8000 Minor image fix by HammadTheOne · Pull Request #71 · plotly/plotly.r-docs · GitHub
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Minor image fix #71

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Merged
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Aug 18, 2021
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Minor image fix #71

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Update 2021-08-03-horizontal-vertical-shapes.Rmd
HammadTheOne Aug 17, 2021
09a93a8
Removing Python reference
HammadTheOne Aug 17, 2021
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16 changes: 8 additions & 8 deletions r/2020-02-25-images.Rmd
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@@ -1,5 +1,5 @@
---
description: How to display image data in Python with R.
description: How to display image data with R.
display_as: scientific
language: r
layout: base
Expand Down Expand Up @@ -40,7 +40,7 @@ library(EBImage)

img = readImage('https://upload.wikimedia.org/wikipedia/commons/thumb/0/00/Crab_Nebula.jpg/240px-Crab_Nebula.jpg')

fig <- plot_ly(type="image", z=img*255)
fig <- plot_ly(type="image", z=img*255)
fig
```
### Define the data range covered by the color range with zmin and zmax
Expand All @@ -54,11 +54,11 @@ library(EBImage)

img = readImage('https://upload.wikimedia.org/wikipedia/commons/thumb/0/00/Crab_Nebula.jpg/240px-Crab_Nebula.jpg')
# Stretch the contrast of the red channel only, resulting in a more red image
fig <- plot_ly(type="image", z=img*250,
fig <- plot_ly(type="image", z=img*250,
zmin=c(10, 0, 0), zmax=c(200, 250, 250))
fig
```
### Set Ticks and Margins
### Set Ticks and Margins

```{r}
library(plotly)
Expand All @@ -74,11 +74,11 @@ fig

### Drawing Shapes on Images

You can create layout shapes programatically, but you can also draw shapes manually by setting the `dragmode` to one of the shape-drawing modes: `drawline`,`drawopenpath`, `drawclosedpath`, `drawcircle`, or `drawrect`. If you need to switch between different shape-drawing or other dragmodes (panning, selecting, etc.), modebar buttons can be added in the `config` of your figure to select the dragmode.
You can create layout shapes programatically, but you can also draw shapes manually by setting the `dragmode` to one of the shape-drawing modes: `drawline`,`drawopenpath`, `drawclosedpath`, `drawcircle`, or `drawrect`. If you need to switch between different shape-drawing or other dragmodes (panning, selecting, etc.), modebar buttons can be added in the `config` of your figure to select the dragmode.

If you switch to a different dragmode such as pan or zoom, you will need to select the drawing tool in the modebar to go back to shape drawing.

This shape-drawing feature is particularly interesting for annotating graphs, in particular [image traces](https://plotly.com/r/displaying-images/).
This shape-drawing feature is particularly interesting for annotating graphs, in particular [image traces](https://plotly.com/r/displaying-images/).

Once you have drawn shapes, you can select and modify an existing shape by clicking on its boundary (note the arrow pointer). Its fillcolor turns to pink to highlight the activated shape and then you can

Expand All @@ -98,7 +98,7 @@ library(EBImage)

img = readImage('https://upload.wikimedia.org/wikipedia/commons/thumb/0/00/Crab_Nebula.jpg/240px-Crab_Nebula.jpg')

fig <- plot_ly(type="image", z=img*255)
fig <- plot_ly(type="image", z=img*255)

fig <- layout(fig, dragmode="drawrect", xaxis = list(title = 'Click and drag inside the figure to draw a rectangle or select another shape in the modebar'))

Expand All @@ -110,4 +110,4 @@ fig
```

### Reference
See [https://plotly.com/r/reference/#image](https://plotly.com/r/reference/#area) for more information and chart attribute options!
See [https://plotly.com/r/reference/#image](https://plotly.com/r/reference/#area) for more information and chart attribute options!
1 change: 0 additions & 1 deletion r/2021-07-27-ml-pca.Rmd
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Expand Up @@ -15,7 +15,6 @@ thumbnail: thumbnail/ml-pca.png
```{r, echo = FALSE, message=FALSE}
knitr::opts_chunk$set(message = FALSE, warning = FALSE)
```
## PCA Visualization in Python
Visualize Principle Component Analysis (PCA) of your high-dimensional data in R with Plotly.

This page first shows how to visualize higher dimension data using various Plotly figures combined with dimensionality reduction (aka projection). Then, we dive into the specific details of our projection algorithm.
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2 changes: 1 addition & 1 deletion r/2021-08-03-horizontal-vertical-shapes.Rmd
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Expand Up @@ -9,7 +9,7 @@ output:
html_document:
keep_md: true
permalink: r/horizontal-vertical-shapes/
thumbnail: thumbnail/shape.png
thumbnail: thumbnail/shape.jpg
---

```{r, echo = FALSE, message=FALSE}
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