Change background color of R plot

Question

All right  let s say I have the following plot   df   data frame date c rep 2008 2013  by 1                    value c 303 407 538 696 881 1094    barplot df value  main  TITLE   col  gray   ylab  People   xlab  Years     How can I change the background to navy blue   I know this is possible with ggplot2  but not sure if I can do this with base graphics

User · Answer

I use abline   with extremely wide vertical lines to fill the plot space   abline v   xpoints  col    grey90   lwd   80   You have to create the frame  then the ablines  and then plot the points so they are visible on top  You can even use a second abline   statement to put thin white or black lines over the grey  if desired   Example   xpoints   1 20 y   rnorm 20  plot NULL ylim c -3 3  xlim xpoints  abline v xpoints col  gray90  lwd 80  abline v xpoints col  white   abline h   0  lty   2   points xpoints  y  pch   16  cex   1 2  col    red

User · Answer

After combining the information in this thread with the R-help  rect  I came up with this nice graph for circadian rhythm data  24h plot   The script for the background rectangles is this   root script    gt rect xleft  ybottom  xright  ytop  col   NA  border   NULL    My script    gt i  lt - 24  0 8   gt rect 8 i  1  24 i  130  col    lightgrey   border NA   gt rect 8 i  -10  24 i  0 1  col    black   border NA    The idea is to represent days of 24 hours with 8 h light and 16 h dark   Cheers   Rom  rio

User · Answer

adjustcolor  blanchedalmond  alpha f   0 3    The above function provides a color code which corresponds to a transparent version of the input color  In this case the input color is  blanchedalmond       Input alpha values range on a scale of 0 to 1  0 being completely transparent and 1 being completely opaque   In this case  the code for the translucent shad of  blanchedalmond  given an alpha of  3 is   FFEBCD4D   Be sure to include the hashtag symbol   You can make the new translucent color into the background color by using this function provided by joran earlier in this thread   rect par  usr   1  par  usr   3  par  usr   2  par  usr   4  col    blanchedalmond     By using a translucent color  you can be sure that the graph s data can still be seen underneath after the background color is applied  Hope this helps

User · Answer

One Google search later we ve learned that you can set the entire plotting device background color as Owen indicates  If you just want the plotting region altered  you have to do something like what is outlined in that R-Help thread   plot df  rect par  usr   1  par  usr   3  par  usr   2  par  usr   4  col    gray   points df    The barplot function has an add parameter that you ll likely need to use

User · Answer

Old question but I have a much better way of doing this  Rather than using rect   use polygon  This allows you to keep everything in plot without using points  Also you don t have to mess with par at all  If you want to keep things automated make the coordinates of polygon a function of your data    plot new   polygon c -min df  1   2 -min df  1   2 max df  1   2 max df  1   2  c -min df  2   2 max df  2   2 max df  2   2 -min df  2   2   col  grey   par new T  plot df

User · Answer

Like  par bg    blue     Now do plot

[r] Change background color of R plot

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