How to change the font size and color of x-axis and y-axis label in a scatterplot with plot function in R

Question

I used the following code to draw a scatterplot  How to increase the font size and change colour of x-axis and y-axis label    data read csv  data csv    plot data column1 data column2 xlab  x axis   ylab  y axis    pch 19

User · Accepted Answer

To track down the correct parameters you need to go first to  plot default  which refers you to  par and  axis   plot 1  1  xlab  x axis   ylab  y axis    pch 19             col lab  red   cex lab 1 5        for the xlab and ylab            col  green                        for the points

User · Answer

Look at  par for the various graphics parameters  In general cex controls size  col controls colour  If you want to control the colour of a label  the par is col lab  the colour of the axis annotations col axis  the colour of the main text  col main etc  The names are quite intuitive  once you know where to begin  For example x  lt - 1 10 y  lt - 1 10  plot x   y xlab  quot x axis quot   ylab  quot y axis quot    pch 19  col axis    blue   col lab    red   cex axis   1 5  cex lab   2    If you need to change the colour   style of the surrounding box and axis lines  then look at  axis or  box  and you will find that you will be using the same parameter names within calls to box  and axis  You have a lot of control to make things however you wish  eg plot x   y xlab  quot x axis quot   ylab  quot y axis quot    pch 19   cex lab   2  axes   F col lab    red   box col    lightblue   axis 1  col    blue   col axis    purple   col ticks    darkred   cex axis   1 5  font   2  family    serif   axis 2  col    maroon   col axis    pink   col ticks    limegreen   cex axis   0 9  font  3  family    mono     Which is seriously ugly  but shows part of what you can control

User · Answer

Taking DWins example   What I often do  particularly when I use many  many different plots with the same colours or size information  is I store them in variables I otherwise never use  This helps me keep my code a little cleaner AND I can change it  globally    E g   clab   1 5 cmain   2 caxis   1 2  plot 1  1  xlab  x axis   ylab  y axis    pch 19             col lab  red   cex lab clab                 col  green   main    Testing scatterplots   cex main  cmain  cex axis caxis     You can also write a function  doing something similar  But for a quick shot this is ideal  You can also store that kind of information in an extra script  so you don t have a messy plot script   which you then call with setwd     source  plotcolours r    in a file say called plotcolours r you then store all the e g  colour or size variables  clab   1 5 cmain   2 caxis   1 2    for colours could use   darkred lt -rgb 113 28 47 maxColorValue 255    as your variable  darkred  now has the colour information stored  you can access it in your actual plotting script     plot 1 1 col darkred

[r] How to change the font size and color of x-axis and y-axis label in a scatterplot with plot function in R?

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