Re: [R] decrease amount of ticks on y axis in lattice levelplot

From: Weidong Gu <wgu_at_uab.edu>
Date: Thu, 31 Jan 2008 12:19:13 -0600

levelplot(, scale=list(y=list(tick.number=))) ?xyplot()

Weidong Gu,
Department of Medicine
University of Alabama, Birmingham
1900 University Blvd., Birmingham, Alabama 35294 Email: wgu_at_uab.edu
PH: (205)-975-9053

-----Original Message-----
From: r-help-bounces_at_r-project.org [mailto:r-help-bounces_at_r-project.org] On Behalf Of Bram Kuijper
Sent: Thursday, January 31, 2008 11:53 AM To: r-help_at_stat.math.ethz.ch
Subject: [R] decrease amount of ticks on y axis in lattice levelplot

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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R-help_at_r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Thu 31 Jan 2008 - 18:28:19 GMT