R barplot Y-axis scale too short

Question

I m trying to generate a barplot  but the y-axis scale is too short  Here s my code   barplot as matrix dat   log  y   ylim c 10000 100000000   beside TRUE          ylab    Number of reads   col   c  gray   black   white        It leaves the room for the axis  as per ylim   but doesn t fill in the actual axis  I ve been through  barplot and tried a few things  from googling around I thought xpd   F  yaxs   c 10000 10000000 5  should work  but it didn t    I know it s a minor thing  but it s exactly the kind of problem I get stuck on for ages  instead of actually working  so any help would be much appreciated   Edit  Cheers for the input guys   I did initially plot without ylim  but it ends up with an even more bizarre axis  with the same problem   I actually picked my ylim values to give it a nicer spaced axis    Here s the data   dat  lt - read table text  D2 D3n D3m D4n D4m 21234722 34262282 31920464 25486357 20712943 35343 64403 22537 39934 46547 126646 312286 101105 81537 76944   header TRUE  sep        Edit 2    DWin had it right - I updated my R  and now it plots fine - thanks everyone

User · Answer

barplot data      barplot data  yaxp c 0  max data   5       yaxp c minY-axis  maxY-axis  Interval

User · Answer

I see you try to set ylim but you give bad values  This will change the scale of the plot  like a zoom   For example see this   par mfrow c 2 1   tN  lt - table Ni  lt - stats  rpois 100  lambda   5   r  lt - barplot tN  col   rainbow 20  ylim c 0 50  main  long y-axis   r  lt - barplot tN  col   rainbow 20  main  short y axis      Another option is to plot without axes and set them manually using axis and usr   require grDevices    for colours par mfrow c 1 1   r  lt - barplot tN  col   rainbow 20  main  short y axis  ann FALSE axes FALSE  usr  lt - par  usr   par usr c usr 1 2   0  20   axis 2 at seq 0 20 5

User · Answer

Simplest solution seems to be specifying the ylim range  Here is some code to do this automatically  left default  right - adjusted      default y-axis barplot dat  beside TRUE     automatically adjusted y-axis barplot dat  beside TRUE  ylim range pretty c 0  dat         The trick is to use pretty   which returns a list of interval breaks covering all values of the provided data  It guarantees that the maximum returned value is 1  a round number 2  greater than maximum value in the data   In the example 0 was also added pretty c 0  dat   which makes sure that axis starts from 0

[r] R barplot Y-axis scale too short

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