[R] Spatstat - Several density plots using the same scale

[Arthur Weiss]

Hi everyone,

I am using the package "spatstat" for ploting kernel maps of my data.
It is a marked point pattern, the result of mosquito surveillance in a
area in a week.
For each trap, the number of individuals captured is the mark of the point.

> plot(density(X, weights=X$marks))

makes a nice kernel, but the problem is that I've got several weeks and
for each week the density is re-scaled, which makes comparisons useless.
I've been trying to find some way to pass the scale limits to the function
but just couldn't find.

Hope someone can help
Thanks
Arthur