[R] How to specify only minimum ylim parameter for boxplot

[e-letter]

Readers,

For a command:

x<-a data matrix
y<-another data matrix
z<-and another data matrix
boxplot(c(x,y,z),las=1,xaxt="n",ylab="text",xlab="text",ylim=c(0,..?))

is it possible to specify only that the boxplot graph starts with
value 0 at the bottom of the ordinate (y axis) and the maximum value
is determined by data in x,y and z?

Yours,

rhelp at conference.jabber.org
r251
mandriva2008