Day 40, 2020-10-03Day 37&38&39, 2020-09-30 & 2020-10-01 & 2020-10-02Day 35 & Day 36, 2020-09-28 & 2020-09-29Day 34, 2020-09-27Day 33, 2020-09-26Day 32 (Task 10), 2020-09-25Day 31 (9-2-10), 2020-09-24Day Thirty (A puzzle to be solved), 2020-09-22Day Twenty Nine, 2020-09-22Day Twenty-Eight (Task 9-2-9), 2020-09-21Day Twenty-Seven, 2020-09-20Day Twenty Six, 2020-09-19Day Twenty Five, 2020-09-18Day Twenty Four, 2020-09-17Day Twenty Three (Task 9-2), 2020-09-16Day Twenty Two (Task 9-1 continued), 2020-09-15Day Twenty-One (Task 9-1 continued), 2020-09-14Day Twenty (Task 8 Continued + Task 9-1), 2020-09-13Day Nineteen (Task 8), Spet. 12, 2020Day Eighteen (Task 7-1-10, 11, Sept. 11, 2020Day Fourteen, Fifteen, Sixteen & Seventeen, Spet. 07 ~ 10, 2020Day Thirteen (Task 7-1), 2020-09-06Day Twelve, Sept. 5, 2020: ScalesDay Eleven, Sept.4th, 2020Day Ten (Task 6-6), Sept. 3rd, 2020Day Nine, 2020-09-02Day Six, 30 Aug 2020Day Five, 29 Aug 2020Day Four, 28 Aug 2020Day Three, 27 Aug 2020Day 1 & Day 2, 25 Aug. & 26 Aug., 2020, Basic Commands
Day Eight, Spet. 1, 2020
md`# Day Eight, Spet. 1, 2020
I didn't study D3.js yesterday so there was not Day Sever. Won't do this again and will keep learning D3.js every single day`
d3 = require("d3@6")
md` ## Chapter 6, Drawing with Data
### Tasks 6-1:
- 6-1-1, Make a bar chart, in which the height of each bar correspondes to its data value.
- dataset = [5,10,15,20,25];
- Attributions of the CSS, \`div.bar\`: inline-block, set the width to be 20px, the height 75px, background color is teal;
- 6-1-2, Make the bar five times taller, and add some space (2px) between bars;
- 6-1-3, Change the dataset to be made up of 25 random numbers that range from 0 to 30 (using \`for\` loop, \`Math.random()\`, and \`.push()\`);
- Make all the random numbers whole numbers (using \`Math.round()\`)
`
md` ### Task 6-2: Drawing SVGs:
- 6-2-1, dataset = [5, 10, 15, 20, 25]
- 6-2-2, Create a SVG within \`<body></body>\`; Set the width of the SVG to be 500, and the height to be 50;
- 6-2-3, \`var svg = d3.select("body").append("svg")\`, what does this line of code do?
- 6-2-4, Draw five circles, the x-pistion value of each circle's center is (index * 50) + 25, the y-position is half of the pre-defined height, and the value of the radius is the data value itself;
- 6-2-5, Fill the five circles with "yellow", the stroke being "orange", and the stroke width is half of the corresponding data values;
- 6-2-6, Delete all the above codes except for the \`div.bar{}\` CSS styling, and then set the dataset to be \`[ 5, 10, 13, 19, 21, 25, 22, 18, 15, 13,11, 12, 15, 20, 18, 17, 16, 18, 23, 25 ]\`, generate \`n\` number of divs before the enclosing tag of \`<body>\`(n = the length of the above dataset; and yes, you still need the CSS between \`<head> and </head>\`), give it a class named as "bar". The height of each bar is five timees the corresponding data values. Attributions of the CSS, \`div.bar\`: inline-block, set the width to be 20px, the height 75px, background color is teal, and create a 2px margin between bars;
`
md `### Task 6-3: Draw a new SVG chart
- Still use the above dataset with 20 data values;
- Insert a new \`SVG\` between \`<body>\` and \`</body>\`. Set the width of the SVG to be 500 and the height 100 pixels;
- Now, instead of creating \`divs\`, we'll be creating \`rect\` s. Create 20 \`rect\` s, each with x =0, y=0, width = 20, height = 100;
- Set the \`x\` to be dynamic, such that the ith rect has a x of \`i*21\`;
- Set the \`x\` to be flexible, such that each x = i * (w / dataset.length); Set the \`width\` of each rect to be flexible as well, each \`width = w / dataset.length - 1\`;
- Try to set the height of each rect to be the corresponding data value;
- Set the top of each bar to be \`h-d\` and the height of each bar to be the corresponding data value;
- Change \`d\` to be \`d * 4\`;
- Chage the bar color to \`teal\`;
- p. 131
`
svg = d3.create("svg")
.attr("width", 500)
.attr("height", 100);
dataset = [ 5, 10, 13, 19, 21, 25, 22, 18,
15, 13,11, 12, 15, 20, 18, 17, 16, 18, 23, 25 ]
rectangles = svg.selectAll("rect")
.data(dataset)
.enter()
.append("rect")
.attr("x", 50)
.attr("y", 0)
.attr("width", 20)
.attr("height",50);
svg.node() //This will render the svg
md`
Go to [Day Nine](https://observablehq.com/@hongtaoh/day-nine-spet-2-2020)
`
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