In the case of my plot, the aspect ratio of width:height is not right. Notice in the plot above that there is too much white space above and below the plot. One is by specifying margins for out plot. On to the pesky white space on either side of the plot. # plot ndvi with legend plot ( ndvi_classified, legend = FALSE, main = "ndvi plot", col = the_colors, axes = FALSE, box = FALSE ) # set xpd to T to allow the legend to plot OUTSIDE of the plot area par ( xpd = TRUE ) legend ( x = ndvi_classified extent xmax, y = ndvi_classified extent ymax, legend = c ( "Healthy vegetation", "Less healthy vegetation", "No vegetation" ), fill = rev ( the_colors )) # use rev to reverse the order of colors for the legend This setting will become a global setting until you clear your plot space! To clear the plot dev space programmatically, use dev.off(). Why? Because if you plot another plot in R, it will use the parameters that you set previously! In the case above you set the axes to white. Reset DevĪny time you modify the parameters, you should consider resetting the dev() space. This is because it’s no longer plotting using a square aspect ratio - you’ve adjusted that! You can experiment with different fig width and height values depending upon the aspect ratio of the plot that you are trying to print to your report. Notice that now my plot has less white space above and below the image. par ( col.axis = "white", col.lab = "white", tck = 0 ) # plot plotRGB ( all_landsat_bands_st, r = 4, b = 3, g = 2, stretch = "hist", main = "title here", axes = TRUE ) # set bounding box to white as well box ( col = "white" ) # turn all of the lines to white As I can't reproduce for now, it is hard to look into it myself and I need your help.# adjust the parameters so the axes colors are white. Is this happening only with ggplot2 graphics ? What happens when saving the file yourself ? like dev = "ragg_png" as knitr option or in the rmarkdown output format. You could try another device to see if this change anything. What does happen in R console if you generate the file and save them to file ? using ggplot2::ggsave() for example.īy the way, what knitr does is using the grDevices::png() device by default to save to file. Could you try with last available daily version ? If I understand correctly, this could be link to RStudio IDE. This issue still happens in RStudio 2021.09.01 Build 372 with R 4.1.2, knitr 1.37, rmarkdown 2.11 on 14'' M1 MacBook pro.
Rmarkdown plot size code#
You mean that this only happens when running code inside RStudio IDE ? If you run rmarkdown::render() in console, you get the same output every time ? Knitr html output figures are not affected. It happens only when figure is generated by running a chunk in Rmd document in RStudio, but not when the code is run from normal document.ĭo you mean it only happen using the green arrow for running a chunk in RStudio IDE source pane ?īy "normal" document you mean R source file ?Ĭan you share the document you are using ? Which format are you using ? Having the files you are generating on your side can help see the difference and investigate. You can set fig.retina = 1 and control size directly using option. This is just about image dimensions and configuration. I don't rmarkdown does anything specific to screen display here. We get the same dimensions but the density is different.
Files will be the same dimension (4 x 4 inches) but file size will be bigger as DPI gets bigger We can see that fig.retina is basically a DPI multiplier.
img <- magick ::image_read( knitr ::fig_chunk( "plot2 ", "png ", 1)) magick ::image_info( img) ``` When chunk has specified figure size e.g. There seems to be one annoying thing when chunk is generating figure in R markdown document. I am not sure if this is the right place to submit this.
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