29:null 2a:["$","title",null,{"children":"Final Problem 1 Practice (11 AM Section) | Charles Redmond | Observable"}] 2f:[] 2d:{"id":"d8e854aeedaf23f8","slug":"final-problem-1-practice-11-am-section","title":"Final Problem 1 Practice (11 AM Section)","thumbnail":"8788243237cd180b4499a7aa27cac9d4f5432a21bd91ee79e72da94eb0178419","access_level":"public","create_time":"$D2020-11-18T16:12:58.348Z","update_time":"$D2020-11-19T16:06:33.826Z","view_time":null,"first_public_time":"$D2020-11-18T16:28:09.431Z","has_unpublished_edits":null,"fork":{"id":"9a85e91e02aa231c","slug":"final-problem-1-template","title":"Final Problem 1 Template","owner":{"id":"66151b62b45d9fca","login":"credmond","name":"Charles Redmond"}},"stars":0,"starred":false,"owner":{"type":"team","id":"66151b62b45d9fca","login":"credmond","name":"Charles Redmond","avatar_url":"https://avatars-next.observableusercontent.com/50425ed9f407a7b47d1c471a09963f335e0652ab9acc237869e2d7949fb04a77","tier":"starter_2024"},"version":316,"publish_version":316,"role":null,"authored":false,"authors":[{"type":"individual","id":"37a987477e8b6db3","login":"credmond","name":"Charles Redmond","avatar_url":"https://avatars-next.observableusercontent.com/50425ed9f407a7b47d1c471a09963f335e0652ab9acc237869e2d7949fb04a77","tier":null}],"members":[{"type":"individual","id":"37a987477e8b6db3","login":"credmond","name":"Charles Redmond","avatar_url":"https://avatars-next.observableusercontent.com/50425ed9f407a7b47d1c471a09963f335e0652ab9acc237869e2d7949fb04a77","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":10,"collection":{"id":"83911aebcace17a1","slug":"fall20ds","title":"Fall20DS","owner":{"id":"66151b62b45d9fca","login":"credmond","name":"Charles Redmond"}},"type":"notebook","body":{"title":"Final Problem 1 Practice (11 AM Section)","cells":[{"id":0,"value":"md`# Final Problem 1 Practice (11 AM Section)`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":306,"value":"rmse = {\n const a = []\n for(let i = 30; i < 61; i = i + 1){\n const x = points[i].x\n const y = points[i].y\n const yhat = slope*x + intercept\n const diff = y - yhat\n const sqDiff = diff*diff\n a.push(sqDiff)\n }\n \n for(let i = 0; i < 30; i = i + 1){\n const x = points[i].x\n const y = points[i].y\n const yhat = -slope*x + intercept\n const diff = y - yhat\n const sqDiff = diff*diff\n a.push(sqDiff)\n }\n return Math.sqrt(d3.mean(a))\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":40,"value":"svg = {\n const svg = html``\n const container = d3.select(svg)\n const xScale = makeXAxis(container,[-30,30],[30,570],150)\n const yScale = makeYAxis(container,[-30,30],[270,30],300)\n \n for(let i = 0; i < 61; i = i + 1){\n container.append(\"circle\")\n .attr(\"r\",5)\n .attr(\"cx\",xScale(points[i].x))\n .attr(\"cy\",yScale(points[i].y))\n }\n \n container.append(\"line\")\n .attr(\"stroke\",\"tomato\")\n .attr(\"stroke-width\",5)\n .attr(\"x1\",xScale(0))\n .attr(\"y1\",yScale(slope*0 + intercept))\n .attr(\"x2\",xScale(30))\n .attr(\"y2\",yScale(slope*30 + intercept))\n \n container.append(\"line\")\n .attr(\"stroke\",\"tomato\")\n .attr(\"stroke-width\",5)\n .attr(\"x1\",xScale(0))\n .attr(\"y1\",yScale(-slope*0 + intercept))\n .attr(\"x2\",xScale(-30))\n .attr(\"y2\",yScale(-slope*-30 + intercept))\n \n return svg\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":295,"value":"viewof intercept = slider({min:-30,max:30})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":300,"value":"viewof slope = slider({max:3})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":177,"value":"points = {\n const points = []\n let slope\n for(let i = -30; i <= 30; i = i + 1){\n if(i < 0){\n slope = -1\n }else{\n slope = 1\n }\n points.push({x:i,y:slope*i + normal(0,3)})\n }\n \n return points\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":38,"value":"html`\n

CSS

\n \n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":35,"value":"html`

Libraries

`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":2,"value":"d3 = require(\"d3@5\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":52,"value":"import {slider,button,select,text,radio,checkbox,number} from \"@jashkenas/inputs\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":168,"value":"ss = require(\"https://unpkg.com/simple-statistics@6.1.0/dist/simple-statistics.min.js\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":170,"value":"stdlib = require( \"https://unpkg.com/@stdlib/stdlib@0.0.32/dist/stdlib-flat.min.js\" )","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":172,"value":"normal = stdlib.base.random.normal","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":273,"value":"makeXAxis = function(container,domain,range,y){\n const xScale = d3.scaleLinear().domain(domain).range(range)\n const xAxis = container.append(\"g\").attr(\"transform\",`translate(0,${y})`)\n d3.axisBottom(xScale)(xAxis)\n return xScale\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":274,"value":"makeYAxis = function(container,domain,range,x){\n const yScale = d3.scaleLinear().domain(domain).range(range)\n const yAxis = container.append(\"g\").attr(\"transform\",`translate(${x},0)`)\n d3.axisLeft(yScale)(yAxis)\n return yScale\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":310,"value":"math = require('mathjs@6.2.1/dist/math.js')","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W2f","stdlib":"1","titling":"auto"}} 2e:"$2d:body"