How to change tick-marks for y-axis in base histogram?

Question

I would like to change my Y axis of these histograms to start at 20 and end at 180 AND making it so there is always 20 between each number (20, 40, 80,...). How should I do it?

I read about yaxis command, but I just dont know how to make it work as I am a total noob in coding (no education in that area).

This is the graph I am working on:

And this is the code I have:

 orientation$head_linear <- ifelse(orientation$head > 180, 360 - orientation$head, orientation$head) orientation$body_linear <- ifelse(orientation$body > 180, 360 - orientation$body, orientation$body) par(mfrow = c(2,1)) hist(orientation$head_linear, main = NULL, ylim=c(20,180), ylab = NULL, xlab = NULL) hist(orientation$body_linear, main = NULL, ylim=c(20, 180), ylab = NULL, xlab = " Odchylka od vletového otvoru ")

I have set the limit of Y axis with ylim code, but it doesnt seem to work (I have succesfully used it before in different work).

Answer 1

Maybe you mean the xaxt= argument whith which you can omit the y-axis. If you use it, you may create a custom axis afterwards. Use a seq(from=0, to=360, by=20) for it's at= argument.

 par(mfrow=c(2, 1)) hist(orientation$head_linear, main=NULL, yaxt='n', ylab=NULL, xlab=NULL) axis(side=2, at=seq(from=0, to=360, by=20)) hist(orientation$body_linear, main=NULL, yaxt='n', ylab=NULL, xlab=" Odchylka od vletového otvoru ") axis(2, seq(0, 360, 20))

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Data:

 n <- 500 orientation <- data.frame( head_linear=sample(360, n, replace=TRUE), body_linear=sample(360, n, replace=TRUE) )