d86331af3c
Use `last_modified_at` rather than `last_updated`. So that the jekyll-sitemap plugin automatically looks for the standard `last_modified_at` front matter field to generate the `<lastmod>` tag in your `sitemap.xml`. It fixes [#2598](https://github.com/alshedivat/al-folio/issues/2598) Also, it preserves backward compatibility, as the updated metadata logic prioritizes the `page.last_modified_at`, and defaults to `page.last_updated`.
106 lines
2.7 KiB
Markdown
106 lines
2.7 KiB
Markdown
---
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layout: post
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title: a post with vega lite
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date: 2024-01-27 00:20:00
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last_modified_at: 2024-04-14 04:30:00
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description: this is what included vega lite code could look like
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tags: formatting charts
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categories: sample-posts
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chart:
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vega_lite: true
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---
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This is an example post with some [vega lite](https://vega.github.io/vega-lite/) code.
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````markdown
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```vega_lite
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{
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"$schema": "https://vega.github.io/schema/vega-lite/v5.json",
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"description": "A dot plot showing each movie in the database, and the difference from the average movie rating. The display is sorted by year to visualize everything in sequential order. The graph is for all Movies before 2019.",
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"data": {
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"url": "https://raw.githubusercontent.com/vega/vega/main/docs/data/movies.json"
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},
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"transform": [
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{"filter": "datum['IMDB Rating'] != null"},
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{"filter": {"timeUnit": "year", "field": "Release Date", "range": [null, 2019]}},
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{
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"joinaggregate": [{
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"op": "mean",
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"field": "IMDB Rating",
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"as": "AverageRating"
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}]
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},
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{
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"calculate": "datum['IMDB Rating'] - datum.AverageRating",
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"as": "RatingDelta"
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}
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],
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"mark": "point",
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"encoding": {
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"x": {
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"field": "Release Date",
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"type": "temporal"
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},
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"y": {
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"field": "RatingDelta",
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"type": "quantitative",
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"title": "Rating Delta"
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},
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"color": {
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"field": "RatingDelta",
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"type": "quantitative",
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"scale": {"domainMid": 0},
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"title": "Rating Delta"
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}
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}
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}
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```
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````
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Which generates:
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```vega_lite
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{
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"$schema": "https://vega.github.io/schema/vega-lite/v5.json",
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"description": "A dot plot showing each movie in the database, and the difference from the average movie rating. The display is sorted by year to visualize everything in sequential order. The graph is for all Movies before 2019.",
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"data": {
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"url": "https://raw.githubusercontent.com/vega/vega/main/docs/data/movies.json"
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},
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"transform": [
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{"filter": "datum['IMDB Rating'] != null"},
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{"filter": {"timeUnit": "year", "field": "Release Date", "range": [null, 2019]}},
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{
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"joinaggregate": [{
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"op": "mean",
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"field": "IMDB Rating",
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"as": "AverageRating"
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}]
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},
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{
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"calculate": "datum['IMDB Rating'] - datum.AverageRating",
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"as": "RatingDelta"
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}
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],
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"mark": "point",
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"encoding": {
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"x": {
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"field": "Release Date",
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"type": "temporal"
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},
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"y": {
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"field": "RatingDelta",
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"type": "quantitative",
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"title": "Rating Delta"
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},
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"color": {
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"field": "RatingDelta",
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"type": "quantitative",
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"scale": {"domainMid": 0},
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"title": "Rating Delta"
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}
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}
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}
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```
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This plot supports both light and dark themes.
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