How to specify the actual x axis values to plot as x axis ticks in R

Question

I am creating a plot in R and I dont like the x axis values being plotted by R   For example   x  lt - seq 10 200 10  y  lt - runif x   plot x y    This plots a graph with the following values on the X axis   50  100  150  200  However  I want to plot the 20 values 10 20  30     200 stored in variable x  as the X axis values  I have scoured through countless blogs and the terse manual - after hours of searching  the closest I ve come to finding anything useful is the following  summarized  instructions    call plot   or par    specifying argument xaxt  n  call axis   e g  axis side   1  at   seq 0  10  by   0 1   labels   FALSE  tcl   -0 2    I tried it and the resulting plot had no x axis values at all  Is it possible that someone out there knows how to do this  I can t believe that no one has ever tried to do this before

User · Answer

In case of plotting time series  the command ts plot requires a different argument than xaxt  n   require graphics  ts plot ldeaths  mdeaths  xlab  year   ylab  deaths   lty c 1 2   gpars list xaxt  n    axis 1  at   seq 1974  1980  by   2

User · Answer

You ll find the answer to your question in the help page for  axis   Here is one of the help page examples  modified with your data   Option 1  use xaxp to define the axis labels  plot x y  xaxt  n   axis 1  xaxp c 10  200  19   las 2    Option 2  Use at and seq   to define the labels   plot x y  xaxt  n   axis 1  at   seq 10  200  by   10   las 2    Both these options yield the same graphic       PS  Since you have a large number of labels  you ll have to use additional arguments to get the text to fit in the plot   I use las to rotate the labels

User · Answer

Take a closer look at the  axis documentation  If you look at the description of the labels argument  you ll see that it is    a logical value specifying whether  numerical  annotations are  to be made at the tickmarks     So  just change it to true  and you ll get your tick labels   x  lt - seq 10 200 10  y  lt - runif x  plot x y xaxt  n   axis side   1  at   x labels   T    Since TRUE is the default for labels  you can just use axis side 1 at x    Be careful that if you don t stretch your window width  then R might not be able to write all your labels in  Play with the window width and you ll see what I mean     It s too bad that you had such trouble finding documentation  What were your search terms  Try typing r axis into Google  and the first link you will get is that Quick R page that I mentioned earlier  Scroll down to  Axes   and you ll get a very nice little guide on how to do it  You should probably check there first for any plotting questions  it will be faster than waiting for a SO reply

User · Answer

Hope this coding will helps you     plot x y xaxt    n    axis side 1 at c 1 20 30 50  labels c  1975   1980   1985   1990

[r] How to specify the actual x axis values to plot as x axis ticks in R

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