2e:null 2f:["$","title",null,{"children":"Vega-Lite Assignment : | Deanna Gelosi | Observable"}] 34:T546,md`Regarding colors and shape, we want to make them correspond to the colors and shapes of the image below. To do this, we need to find a way to match the order of the colors to the order of the Problem Type attributes. This will require that you define some of variables, as shown in the [Multi-View Tutorial](https://observablehq.com/@uwdata/multi-view-composition?collection=@uwdata/visualization-curriculum) . It's best to do the ordering manually since there isn't an algorithmic way to state the order in the original image. You can eyeball the original colors and match them against the color names [here](https://www.w3schools.com/tags/ref_colornames.asp) Hint: Check out this [resource](https://observablehq.com/@uwdata/data-types-graphical-marks-and-visual-encoding-channels?collection=@uwdata/visualization-curriculum) for changing line properties Hint: for both colors and shapes, use *scale* as shown in the [Multi-View Tutorial](https://observablehq.com/@uwdata/multi-view-composition?collection=@uwdata/visualization-curriculum) Hint: if you use the same variable for the year names across both shapes and colors, the two will combine into one legend as shown in the image. If you have trouble getting the colors and shapes to overlap in the legend, you can alternatively just show the color legend and hide the shape legend.`35:T47a,md` As a final step, let's put together plot you created above with a pedestrian data. Using a layer and concat functionality, modify exercise 3 above to following. - define a constant variable that layers line graph of bike data with the markRule line - you can remove the x axis of this diagram by adding *axis(null)* at *vl.x()* - add title called "Bike Riders" - add tool tip for the lines to display "bikes_14counters", "year", "week", "starting_from" when hover on the line - define another constant variable that layers line graph of pedestrian data with the markRule line - add title called "Pedestrians" - add tool tip for the lines to display "pedestrians_14counters", "year", "week", "starting_from" when hover on the line - return by using **vconcat** to vertically concaternate the two layers created above Hint: tool tip instructions can be found from [Introduction to Vega-Lite](https://observablehq.com/@uwdata/introduction-to-vega-lite?collection=@uwdata/visualization-curriculum) This part could be a challenging! Spend time looking at the resources provided and let me know if you have additional questions :) `36:T848,{ const colors = { domain: ['2019', '2020'], range: ['#faa519', '#7e287f'] }; const shapes = { domain: ['2019', '2020'], range: ['circle', 'triangle'] }; const bikes = vl.data(df) .layer( vl.markLine({opacity: 0.6, point: {size: 60}, strokeWidth: 3, interpolate: 'monotone'}) .encode( vl.x().fieldN("week").title('Week').axis(null), vl.y().average("bikes_14counters").title('Number of Bike Riders'), vl.color().fieldN("year").scale(colors).title('Year'), vl.shape().fieldN("year").scale(shapes).legend({orient: 'top-right'}), vl.tooltip([{field: 'bikes_14counters', title: '# of bikes'}, 'year', 'week']), ), vl.markRule({stroke: 'firebrick', strokeWidth: 3}) .transform(vl.filter('datum.week == 12')) .encode( vl.x().fieldN("week") ) ) .title({ text: 'Bike Riders', anchor: 'middle', fontSize: 15 }) .width(700) .height(200); const ped = vl.data(df) .layer( vl.markLine({opacity: 0.6, point: {size: 60}, strokeWidth: 3, interpolate: 'monotone'}) .encode( vl.x().fieldN("week").title('Week').axis({labelAngle: [0] }), vl.y().average("pedestrians_14counters").title('Number of Pedestrians'), vl.color().fieldN("year").scale(colors).title('Year'), vl.shape().fieldN("year").scale(shapes).legend({orient: 'top-right'}), vl.tooltip([{field: 'pedestrians_14counters', title: '# of peds'}, 'year', 'week']), ), vl.markRule({stroke: 'firebrick', strokeWidth: 3}) .transform(vl.filter('datum.week == 12')) .encode( vl.x().fieldN("week") ) ) .title({ text: 'Pedestrians', anchor: 'middle', fontSize: 15 }) .resolve({legend: {orient: "top-right"}}) .width(700) .height(200); return vl.vconcat(bikes,ped) .title({ text: 'Comparison of Number of Bike Riders/Pedestrians on Trails in 2019/2020', anchor: 'middle', fontSize: 18 }) .render(); }37:T44c,changeBikeRiders= { df2.forEach(function (element) { element.percentages = (((element.bikers_20 - element.bikers_19) / element.bikers_19) * 100); }) return vl.data(df) .layer( vl.markBar() .data(df2) .encode( vl.x().fieldN('week').axis({labelAngle: [0] }).title('Week'), vl.y().fieldQ('percentages').title('Change of Bikers in 2020 from 2019 (%)'), vl.color().fieldQ('percentages').legend(null), vl.tooltip([ {field: 'starting_from', title: 'starting from'}, {field: 'bikers_19', title: 'bikers (2019)'}, {field: 'bikers_20', title: 'bikers (2020)'}, {field: 'percentages', title: 'percentage'} ]) ), vl.markRule({stroke: 'firebrick', strokeWidth: 3}) .transform(vl.filter('datum.week == 12')) .encode( vl.x().fieldN("week") ) ) .title({ text: 'Change in Bike Riders Percentages in 2019/2020', anchor: 'middle', fontSize: 15 }) .width(700) .height(200) .render() 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32:{"id":"ac84bbd6ed568063","slug":"vega-lite-assignment","title":"Vega-Lite Assignment :","thumbnail":"0f3a47f228ea181d95a1b4fa9405e7d540c222c67754afa760e1d314707b1c77","access_level":"public","create_time":"$D2021-02-08T06:12:19.978Z","update_time":"$D2021-04-19T00:08:23.465Z","view_time":null,"first_public_time":"$D2021-02-13T01:53:15.609Z","fork":{"id":"61d24e1b06f8bdf5","slug":"vega-lite-assignment","title":"Vega-Lite Assignment :","owner":{"id":"741ae1fc36a7b823","login":"info247-spring21","name":"InfoViz Spring 2021"}},"stars":0,"starred":false,"owner":{"type":"team","id":"cdba5f1501e53793","login":"deannagelosi","name":"Deanna Gelosi","avatar_url":"https://avatars-next.observableusercontent.com/ef6b346df0ddbbe289b118c33504d00ae27b2f1292eaf0e5925b2e2efa6c5a0a","tier":"starter_2024"},"version":993,"publish_version":993,"role":null,"authored":false,"authors":[{"type":"individual","id":"7380c087fc055292","login":"deannagelosi","name":"Deanna Gelosi","avatar_url":"https://avatars-next.observableusercontent.com/ef6b346df0ddbbe289b118c33504d00ae27b2f1292eaf0e5925b2e2efa6c5a0a","tier":null}],"members":[{"type":"individual","id":"7380c087fc055292","login":"deannagelosi","name":"Deanna Gelosi","avatar_url":"https://avatars-next.observableusercontent.com/ef6b346df0ddbbe289b118c33504d00ae27b2f1292eaf0e5925b2e2efa6c5a0a","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":1,"collection":null,"type":"notebook","body":{"title":"Vega-Lite Assignment :","cells":[{"id":0,"value":"md`# Vega-Lite Assignment : \n## Reproduce a chart`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":10,"value":"md `\nHello everyone! In this assignment you will work on replicating a chart using Vega-Lite. You will definitely want to go through the labs and required readings for Vega-Lite as this assignment assumes that you have already done so.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":14,"value":"md`\nIn this assignment, we'll be using a dataset from Makeover Monday published on week 1 of 2021 called \"The Great Bicycle Boom\". The [BBC article](https://www.bbc.com/future/bespoke/made-on-earth/the-great-bicycle-boom-of-2020.html) discusses about a recent surge in bike sales and usage due to the pandemic. The data provided for the project is a weekly trail count data provided from RTC's Eco-Counter dashboard that shows bicycle and pedestrian counts of trails on a weekly basis.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":18,"value":"md`\nHere are few things to keep in mind for the dataset. \n- Each week was compared across years, from 2019 to 2020, with a focus starting on week 12 or March 16.\n- The week of March 16, 2020 was selected for analysis as beginning of the covid period as this was the timeframe when many organizations in the U.S. began encouraging or mandating telework policies, and states imposed travel restrictions and encouraged social distancing to slow the spread of the pandemic. The analysis was intended to determine how changes in social behavior would affect trail counts nationwide.\n- The data contains results collected from 14 trails.\n- Some weeks are omitted for data cleaning purposes.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":539,"value":"md`\nAt the end of the exercise you will be able to recreate the following three visualizations. \n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":542,"value":"FileAttachment(\"7@1.png\").image()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":544,"value":"FileAttachment(\"2.png\").image()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":546,"value":"FileAttachment(\"last.png\").image()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":32,"value":"md `\n### Import Libraries and data\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":34,"value":"import {vl} from '@vega/vega-lite-api'","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":37,"value":"d3 = require('d3')","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":39,"value":"import {printTable} from '@uwdata/data-utilities'","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":699,"value":"fileContents = FileAttachment(\"infoviz_vega.csv\")","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":700,"value":"df = d3.csvParse(await fileContents.text(), d3.autoType)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":49,"value":"md`\nThis is our dataframe defined as \"df\" which contains aggregated information from the trail dataset. Following are the column names and information of df. \n- **year**: year that the data was recorded \n- **week**: the week number that the data was recorded \n- **starting_from**: the starting day (Sunday) of the week \n- **covid_period**: whether or not the timeframe was within the pandemic period (Y- yes, N- no) \n- **pedestrians_14counters**: the number of pedestrians who visited the selected 14 trails during the defined timeframe\n- **bikes_14counters**: the number of bike riders who visited the selected 14 trains during the defined timeframe\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":45,"value":"printTable(df.slice(0, 15))","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":465,"value":"md`\n# Part 1: Create layered line graphs\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":91,"value":"html`\n\n\n

\n1. Create a basic line graph\n

\n\n\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":65,"value":"md`\nIn this exercise, please create a line graph of bike counters using vega-lite with following specifications. \n- x-axis should be \"week\" column \n- the two years should be lines of different color \n\nYour graph should look something like below. They don't need to match perfectly, feel free to modify as long as you keep the three requirements above met.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":561,"value":"FileAttachment(\"4.png\").image()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":639,"value":"vl.markLine()\n .data(df)\n .encode(\n vl.x().fieldN(\"week\"),\n vl.y().average(\"bikes_14counters\"),\n vl.color().fieldN(\"year\")\n )\n .width(800)\n .height(300)\n .render()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":134,"value":"html`\n\n\n

\n2. Modify the line graph\n

\n\n\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":138,"value":"md`\nNow, let's make the following modifications:\n - give this a width (700) and a height (200) to get a better aspect ratio.\n - make the lines curved\n - make the lines thicker \n - make the points a larger size\n - add some translucency to the lines\n - change color and shape of each line \n - add title to the graph \n - modify x and y axis title names to legible format\n - rotate label angle for the x axis (week) to be horizontal\n - you can change the angle by appending *.axis({labelAngle: **[angle number goes here]** })* to *vl.x()* for x axis and *vl.y()* for y axis\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":570,"value":"$34","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":563,"value":"md`\nYour graph should look something like below. They don't need to match perfectly, feel free to modify as long as you keep the above requirements above met.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":565,"value":"FileAttachment(\"5.png\").image()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":636,"value":"{\n const colors = {\n domain: ['2019', '2020'],\n range: ['#faa519', '#7e287f']\n };\n \n const shapes = {\n domain: ['2019', '2020'],\n range: ['circle', 'triangle']\n };\n\n return vl.markLine({opacity: 0.6, point: {size: 60}, strokeWidth: 3, interpolate: 'monotone'})\n .data(df)\n .encode(\n vl.x().fieldN(\"week\").title('Week').axis({labelAngle: [0] }),\n vl.y().average(\"bikes_14counters\").title('Number of Bike Riders'),\n vl.color().fieldN(\"year\").scale(colors).title('Year'),\n vl.shape().fieldN(\"year\").scale(shapes),\n )\n .title({\n text: 'Bike Rider Count Comparison',\n anchor: 'middle',\n fontSize: 15\n })\n .width(700)\n .height(200)\n .render()\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":256,"value":"html`\n\n\n

\n3. Modify the line graph again\n

\n\n\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":575,"value":"md`\nNow, let's make the following modifications:\n- using layer properties learned in the lab section, layer a line with markRule() that shows a red line at week 12 where covid lockdown has initiated in the United States. \n- change the location of the legend to \"top-right\" of the visualization.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":582,"value":"md`\nYour graph should look something like below. They don't need to match perfectly, feel free to modify as long as you keep the above requirements above met.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":585,"value":"FileAttachment(\"6.png\").image()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":634,"value":"{\n const colors = {\n domain: ['2019', '2020'],\n range: ['#faa519', '#7e287f']\n };\n \n const shapes = {\n domain: ['2019', '2020'],\n range: ['circle', 'triangle']\n };\n\nreturn vl.data(df)\n .layer(\n vl.markLine({opacity: 0.6, point: {size: 60}, strokeWidth: 3, interpolate: 'monotone'})\n .encode(\n vl.x().fieldN(\"week\").title('Week').axis({labelAngle: [0] }),\n vl.y().average(\"bikes_14counters\").title('Number of Bike Riders'),\n vl.color().fieldN(\"year\").scale(colors).title('Year'),\n vl.shape().fieldN(\"year\").scale(shapes).legend({orient: 'top-right'}),\n ),\n vl.markRule({stroke: 'firebrick', strokeWidth: 3})\n .transform(vl.filter('datum.week == 12'))\n .encode( \n vl.x().fieldN(\"week\")\n )\n )\n .title({\n text: 'Bike Rider Count Comparison',\n anchor: 'middle',\n fontSize: 15\n })\n .resolve({legend: {orient: \"top-right\"}})\n .width(700)\n .height(200)\n .render();\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":145,"value":"html`\n\n\n

\n4. Add interaction \n

\n\n\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":590,"value":"$35","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":600,"value":"md`\nYour graph should look something like below. They don't need to match perfectly, feel free to modify as long as you keep the above requirements above met.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":603,"value":"FileAttachment(\"7@1.png\").image()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":632,"value":"$36","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":677,"value":"md`\nWhat kind of insights do you get from the above visualization? \n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":680,"value":"md`\nAfter shelter-in-place began in March 2020, bike riding on average increased for the rest of the year compared to 2019. While the number of pedestrians also increased from 2020 to 2019, there are discrete moments when this was not the case. In particular, approximately Week 21 (May 20-26) saw a significant spike in pedestrians. May 27, 2019 was Memorial Day, so it's likely that more people were out walking on the trail over the three-day weekend. \n`","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":288,"value":"md`\n# Part 2: Create a bar plot\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":290,"value":"md`\nIn this exercise, we would like to find out how the numbers of bikeriders have changed in 2020 compared to 2019.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":296,"value":"fileContents2 = FileAttachment(\"infoviz_vega2.csv\")","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":712,"value":"df2 = d3.csvParse(await fileContents2.text(), d3.autoType)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":359,"value":"printTable(df2.slice(0, 12))","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":460,"value":"html`\n\n\n

\n1. Create a function to calculate values\n

\n\n\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":450,"value":"md`\nRecall forEach function from Lab2 that allows you to add new key to arrays of objects. Here is the snippet of the code from the exercise. Should throw an error. \n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":454,"value":"df.forEach(function (element) {\n element.co2_per_min = element.EcoPassengerCO2 / element.RawTravelTime;\n})","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":319,"value":"md`\nUsing forEach function, create a column called \"percentages\" that calculates percentage difference between 2019 and 2020 bike riders count. For example the value in \"percentages\" for \"week12\" should be 349.66, since the number of bike riders have risen 349.66% from 2019 to 2020. Don't worry about the number of decimal points when you calculate this value.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":822,"value":"df2.forEach(function (element) {\n element.percentages = ((element.bikers_20 - element.bikers_19) / element.bikers_19) * 100;\n})","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":474,"value":"html`\n\n\n

\n2. Create a bar graph with percentages\n

\n\n\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":605,"value":"md`\nUsing the percentages you calculated above, create a barchart that meets following requirements\n- create a markRule line at week 12\n- create a tool tip that displays \"starting_from\", \"bikers_19\", \"bikers_20\", \"percentages\" \n- add title and change axis titles relevant to the data \n- set colors to represent \"percentages\"\n- remove the legend \n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":611,"value":"md`\nYour graph should look something like below. They don't need to match perfectly, feel free to modify as long as you keep the above requirements above met.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":614,"value":"FileAttachment(\"8.png\").image()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":629,"value":"{\n df2.forEach(function (element) {\n element.percentages = (((element.bikers_20 - element.bikers_19) / element.bikers_19) * 100);\n })\n \n return vl.markBar()\n .data(df2)\n .encode(\n vl.x().fieldN('week').axis({labelAngle: [0] }).title('Week'), \n vl.y().fieldQ('percentages').title('Change of Bikers in 2020 from 2019 (%)'),\n vl.color().fieldQ('percentages').legend(null),\n vl.tooltip([\n {field: 'starting_from', title: 'starting from'}, \n {field: 'bikers_19', title: 'bikers (2019)'},\n {field: 'bikers_20', title: 'bikers (2020)'},\n {field: 'percentages', title: 'percentage'}\n ])\n )\n \n .title({\n text: 'Change in Bike Riders Percentages in 2019/2020',\n anchor: 'middle',\n fontSize: 15\n })\n .width(700)\n .height(200)\n .render()\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":988,"value":"$37","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":682,"value":"md`\nWhat kind of insights do you get from the above visualization?\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":687,"value":"md`\nOverall bike ridership is up for most of 2020 after shelter-in-place begain in week 12 and tapers off from there. Week 14 also saw a significant increase in bike riders, but weeks 13 and 15 were notably low weeks. Perhaps a mixture of people staying inside all the time as well as using bicycles to get around instead of public transportation could account for this fluctuation.\n`","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":413,"value":"md`\n# Part 3: Create visualization through faceting\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":497,"value":"md`\nWith the bar graph on part 2, we can see a high spark in bike riders on weeks 10 to 14 when lockdown started to happen through US. What about pedestrians? Let's focus on these five weeks and compare pedestrians numbers on these five weeks in 2020 using \"facet\" properties of vega-lite. \n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":492,"value":"html`\n\n\n

\n1. Filter data\n

\n\n\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":483,"value":"md`\nOn Lab 2, we learned out to filter only the data we're interested in looking at through a function called \"filter\". Create an array of objects called **df3** that filters from **df** (data from Part 1) only on weeks 10-14. \n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":643,"value":"df3 = df.filter(record => record.week <= 14 && record.week >= 10);","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":518,"value":"html`\n\n\n

\n2. Facet data based on week\n

\n\n\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":622,"value":"md`\nUsing the new dataframe you created above, create a barchart that meets following requirements\n- facet the data by row using \"year\" \n- have the opacity of color of the graph match values of \"pedestrians_14counters\"\n- remove the legend \n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":620,"value":"md`\nYour graph should look something like below. They don't need to match perfectly, feel free to modify as long as you keep the above requirements above met.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":616,"value":"FileAttachment(\"last.png\").image()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":627,"value":"vl.markBar()\n .data(df3)\n .encode(\n vl.y().fieldN('week').title('Week'),\n vl.x().fieldQ('pedestrians_14counters').title('Number of Pedestrians'),\n vl.color().fieldQ(\"pedestrians_14counters\").legend(null),\n vl.row().fieldN('year').title('Year')\n )\n .render()\n ","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":691,"value":"md`\nWhat kind of insights do you get from the above visualization?\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":689,"value":"md`\nThese plots provide more nuance as to why weeks 12 and, to a lesser degree, 14 saw spikes in percentage changes between 2019 and 2020. In 2019, week 12 had few riders which largely contrasts with the same week in 2020. It's for this same reason why we don't see a large percentage difference in week 10, since both years have approximately the same ridership.\n`","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":408,"value":"md`\n# Part 4(Optional): Additional visualizations\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":672,"value":"md`\nBe creative! Add any additional visualizations you have created that provides a different insights from the ones above. Please explain briefly what insights your visualization provides. \n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":486,"value":"//Your code here**********************************************************","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":130,"value":"md`\n## References\nhttps://data.world/makeovermonday/2021w1/discuss/2021w1/nkpl7c4a\n`","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W38","stdlib":"1","titling":"auto"}} 33:"$32:body"