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-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 Eight, Spet. 1, 2020Day 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 Twenty Nine, 2020-09-22
md`# Day Twenty Nine, 2020-09-22`
md`
## Understanding, finally:
svg.selectAll("placeholder-for-rects") // This will select all placeholder elements and hand them off to the next step
.data(dataset) // This will bind data to the selected placeholder elements, and then return references to all elements to which data was just bound. References to these elements are called "update selection".
.enter() // Select elements that do not yet exist and hand them off to the next step.
.append("rect") // Create a rect element within each element returned by \`enter()\`, and then return reference to this newly created element.
`
md`
- 9-1-4.
- \`<p>Click Here</p>\`. No need to use ""
- \`alert("phrase here")\`
- 9-1-5. Even if you used \`svg.selectAll("placeholder-for-rects")\` to create and select placeholder elements to be used later, you still need to use \`svg.selectAll("rect")\` in \`.on()\` when you updating the data.
`
md` ## Task 9-2
- 9-2-5. Within \`.on("start", ...)\`, you need to use \`d3.select(this)\`, rather than \`svg.select(this)\`.
- 9-2-7. You can add many transitions you want. However, you cannot add a transition within in \`.on("start", ...)\`, which is designed for immediate transformations, not interpolated ones.
For example,
\`svg.selectAll("circle")
.data(dataset)
.transtion()
.duration(1000)
.transition()
.duration(1000)
.
.
.
\` is okay.
- 9-2-9.
- \`bars.enter().append("rect")...\` will return references to newly created element. Therefore, all the codes that follow will be used for this newly created bar, until you use \`merge()\`.
`
md`
Go to [Day 30](https://observablehq.com/@hongtaoh/day-thirty-2020-09-22).
`
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.