[R] Perspective or Contour Plot of a Matrix

Martin Maechler maechler at stat.math.ethz.ch
Sat Jul 8 14:38:22 CEST 2000

>>>>> "amorgan" == amorgan  <amorgan at mitre.org> writes:

    amorgan> I would like to plot a large (401 x 101) matrix of numbers as
    amorgan> a perspective plot (with the columns and row indices as the y
    amorgan> and x components and the values in the matrix at the z
    amorgan> values).  I try to convert it to a data frame, but it always
    amorgan> errors out with "Figure margins too large".  What does this
    amorgan> mean?  How can I get the plot generated?

Why did you think you needed a data.frame
if your large matrix of numbers is called  Mat
just say
which is equivalent to


which is equivalent to

	persp(x = seq(0, 1, len = nrow(z)), 
	      y = seq(0, 1, len = ncol(z)), 
	      z = Mat)

Do you have suggestions for improving the online help for persp
which does contain this info ?

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