[R] Changing the Y graph scale Maximum value.

John Fisler john.fisler at latticesemi.com
Tue Oct 19 22:24:19 CEST 2004


I am new to R and have read the documents related to graphics but have 
not come across a description of how to change the maximum scale on a 
graph.  Below is sample code that sets up a plot window with a 0 Minimum 
to 10 Maximum, X and Y coordinate system:

x <- c(1,2,3,4,5,6,7,8,9,10)
y <- c(1,1.5,2,2.5,3,3.5,4,4.5,5,5.5)
plot(0:10, 0:10, type = "n" )# setting up coord. system
points(x, y, col = "red", cex = 1.5)

I now want to change the maximum Y axis scale to 6.  I am using the 
'points' function to plot 'x' and 'y' because my 'real' data is X and Y 
coordinate based.  When I try to change the maximum Y scale to 6 as in 
the following code segment, I get the following error:

plot(0:10, 0:6, type = "n" )# setting up coord. system
Error in xy.coords(x, y, xlabel, ylabel, log) :
         x and y lengths differ

How do I change the maximum Y scale to 6?


John Fisler

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