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Created WebGL heatmap doc for R API #998
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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| --- | ||
| title: WebGL Heatmaps in R | Examples | Plotly | ||
| name: WebGL Heatmaps | ||
| permalink: r/heatmap-webgl/ | ||
| description: How to make webGL based heatmaps in R with Plotly. | ||
| layout: base | ||
| thumbnail: thumbnail/heatmap-webgl.jpg | ||
| language: r | ||
| page_type: example_index | ||
| has_thumbnail: true | ||
| display_as: scientific | ||
| order: 20 | ||
| output: | ||
| html_document: | ||
| keep_md: true | ||
| --- | ||
| | ||
| ```{r, echo = FALSE, message=FALSE} | ||
| knitr::opts_chunk$set(message = FALSE, warning=FALSE) | ||
| Sys.setenv("plotly_username"="RPlotBot") | ||
| Sys.setenv("plotly_api_key"="q0lz6r5efr") | ||
| ``` | ||
| | ||
| ### New to Plotly? | ||
| | ||
| Plotly's R library is free and open source!<br> | ||
| [Get started](https://plot.ly/r/getting-started/) by downloading the client and [reading the primer](https://plot.ly/r/getting-started/).<br> | ||
| You can set up Plotly to work in [online](https://plot.ly/r/getting-started/#hosting-graphs-in-your-online-plotly-account) or [offline](https://plot.ly/r/offline/) mode.<br> | ||
| We also have a quick-reference [cheatsheet](https://images.plot.ly/plotly-documentation/images/r_cheat_sheet.pdf) (new!) to help you get started! | ||
| | ||
| ### Version Check | ||
| | ||
| Version 4 of Plotly's R package is now [available](https://plot.ly/r/getting-started/#installation)!<br> | ||
| Check out [this post](http://moderndata.plot.ly/upgrading-to-plotly-4-0-and-above/) for more information on breaking changes and new features available in this version. | ||
| | ||
| ```{r} | ||
| library(plotly) | ||
| packageVersion('plotly') | ||
| ``` | ||
| | ||
| #### WebGL Heatmap from an Image | ||
| | ||
| ```{r, results = 'hide'} | ||
| library("jpeg") | ||
| library("plotly") | ||
| | ||
| # Image processing | ||
| url <- "https://images.plot.ly/plotly-documentation/images/heatmap-galaxy.jpg" | ||
| tmpf <- tempfile() | ||
| download.file(url,tmpf,mode="wb") | ||
| data <- readJPEG(tmpf) | ||
| file.remove(tmpf) # remove the downloaded temp file | ||
| | ||
| zdata = rowSums(data*255, dims = 2) | ||
| | ||
| p <- plot_ly( | ||
| z = zdata, | ||
| colorscale = list(c(0,1),c("rgb(155,112,184)","rgb(128,100,64)")), | ||
| type = "heatmapgl" | ||
| ) | ||
| | ||
| # Create a shareable link to your chart | ||
| # Set up API credentials: https://plot.ly/r/getting-started | ||
| chart_link = api_create(p, filename="heatmap-webgl") | ||
| chart_link | ||
| ``` | ||
| | ||
| ``` {r, echo=FALSE} | ||
| chart_link | ||
| ``` | ||
| | ||
| #### Reference | ||
| | ||
| See [https://plot.ly/r/reference/#heatmapgl](https://plot.ly/r/reference/#heatmapgl) for more information and options! | ||
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| --- | ||
| title: WebGL Heatmaps in R | Examples | Plotly | ||
| name: WebGL Heatmaps | ||
| permalink: r/heatmap-webgl/ | ||
| description: How to make webGL based heatmaps in R with Plotly. | ||
| layout: base | ||
| thumbnail: thumbnail/heatmap-webgl.jpg | ||
| language: r | ||
| page_type: example_index | ||
| has_thumbnail: true | ||
| display_as: scientific | ||
| order: 20 | ||
| output: | ||
| html_document: | ||
| keep_md: true | ||
| --- | ||
| | ||
| | ||
| | ||
| ### New to Plotly? | ||
| | ||
| Plotly's R library is free and open source!<br> | ||
| [Get started](https://plot.ly/r/getting-started/) by downloading the client and [reading the primer](https://plot.ly/r/getting-started/).<br> | ||
| You can set up Plotly to work in [online](https://plot.ly/r/getting-started/#hosting-graphs-in-your-online-plotly-account) or [offline](https://plot.ly/r/offline/) mode.<br> | ||
| We also have a quick-reference [cheatsheet](https://images.plot.ly/plotly-documentation/images/r_cheat_sheet.pdf) (new!) to help you get started! | ||
| | ||
| ### Version Check | ||
| | ||
| Version 4 of Plotly's R package is now [available](https://plot.ly/r/getting-started/#installation)!<br> | ||
| Check out [this post](http://moderndata.plot.ly/upgrading-to-plotly-4-0-and-above/) for more information on breaking changes and new features available in this version. | ||
| | ||
| | ||
| ```r | ||
| library(plotly) | ||
| packageVersion('plotly') | ||
| ``` | ||
| | ||
| ``` | ||
| ## [1] '4.7.1' | ||
| ``` | ||
| | ||
| #### WebGL Heatmap from an Image | ||
| | ||
| | ||
| ```r | ||
| library("jpeg") | ||
| library("plotly") | ||
| | ||
| # Image processing | ||
| url <- "https://images.plot.ly/plotly-documentation/images/heatmap-galaxy.jpg" | ||
| tmpf <- tempfile() | ||
| download.file(url,tmpf,mode="wb") | ||
| data <- readJPEG(tmpf) | ||
| file.remove(tmpf) # remove the downloaded temp file | ||
| | ||
| zdata = rowSums(data*255, dims = 2) | ||
| | ||
| p <- plot_ly( | ||
| z = zdata, | ||
| colorscale = list(c(0,1),c("rgb(155,112,184)","rgb(128,100,64)")), | ||
| type = "heatmapgl" | ||
| ) | ||
| | ||
| # Create a shareable link to your chart | ||
| # Set up API credentials: https://plot.ly/r/getting-started | ||
| chart_link = api_create(p, filename="heatmap-webgl") | ||
| chart_link | ||
| ``` | ||
| | ||
| <iframe src="https://plot.ly/~RPlotBot/5461.embed" width="800" height="600" id="igraph" scrolling="no" seamless="seamless" frameBorder="0"> </iframe> | ||
| | ||
| #### Reference | ||
| | ||
| See [https://plot.ly/r/reference/#heatmapgl](https://plot.ly/r/reference/#heatmapgl) for more information and options! |
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I'd probably make the colors pop a little more, something like you have but
colorscale = list(c(0,0.5,1),c("blue", "white", "red"))There was a problem hiding this comment.
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Thanks! @bcdunbar I have changed them to the suggested colorscale.