How to rotate Y axis labels in twoord.plot in R?

Question

Does anyone know how to rotate the Y axis labels in the function twoord.plot in R? Also, how about resizing the font of the Y axis labels?

Answer 1

Under par: I just picked a random plot that comes with twoord.plot package.

 x <- rnorm(100,100,10)

First you need to rotate the Y axis:

 par(las = 1) # rotates the y axis values for every plot you make from now on unless otherwise specified

Next, plot your graph without a Y axis:

 plotH(x,x,yaxt = 'n') # no Y axis

Then, you need to add the Y axis

  axis(2,cex.axis = 0.5) # where 2 specifies the Y axis and 0.5 is half (0.5) of the font size as before.