[R] decrease amount of ticks on y axis in lattice levelplot
Bram Kuijper
a.l.w.kuijper at rug.nl
Thu Jan 31 18:52:53 CET 2008
Hi all,
How can I decrease the number of ticks on the y-axis in a lattice
levelplot()? I have as many ticks displayed on the y-axis as I have
columns of data (1000 columns), how can I decrease this amount of ticks,
while still properly displaying all the data?
Note that I get my data from a matrix object, in which the z-values of
the levelplot are the actual values in the matrix, whereas the row and
column names are the x and y ticks (and thus character data). I guess
that is character data is the root of the problem, but I don't know how
to solve it.
I tried to change the amount of ticks using yscale.components, but this
doesn't work:
yscale.components.myY <- function(...) {
Y <- yscale.components.default(...)
Y$left$ticks$at <- pretty(1,n=10)
Y$left$labels$at <- pretty(1,n=10)
return(Y)
}
print(levelplot(my_matrix),cuts=100,yscale.components=yscale.components.myY)
My full code can be found on pastebin:
http://pastebin.com/m16b267f9
thanks in advance for any help on this,
Bram Kuijper
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