Home/ Questions/Q 7999175
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-04T15:25:41+00:00

I want to plot two graphs on one plot. I read this post ,

  • 0

I want to plot two graphs on one plot. I read this post, but function lines does not work, nothing happens. I don’t know what can be the problem. Any ideas?

Edit. reproducible example:

> tr_error
[1] 0.2314984 0.2314990 0.2314981 0.2314955 0.2314955 0.2314943 0.2314912
[8] 0.2314924
> tst_error
[1] 0.001461264 0.001461767 0.001461001 0.001459936 0.001459626 0.001458594
[7] 0.001457719 0.001458288
> plot(tst_error, type='l')
> lines(tr_error, type='l', col='red')

maybe there is second plot but it is higher?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    It “doesn’t work” because the y-limits do not include the range of the second vector.

     plot(tst_error, type='l', ylim=range( c(tst_error, tr_error) ) )
 lines(tr_error, type='l', col='red')

    It’s not going to be a particularly interesting plot since the scale of the two vectors are so different. The red line’s going to look like a completely flat line.

    • 0