Hello Marc,
Well, image() requires data values in a regular grid. So you need to
interpolate your data to a regular grid before you do your plot. There
are many interpolation methods, but a good place to start is to do
linear interpolation. You should first use expand.grid() to create the
r
Hello R cracks
The image() function requires strictly increasing x and y values and z as a
matrix.
Actually, I don't have equally spaced variables, but anyway want to plot an
colored image() (with z-information).
An example of my problem is here:
a<-data.frame(rnorm(100), rnorm(100), runif(10
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