[R] Spatstat - Kest, envelope problem

[Pavel_K]

Hello,
I am writing cause I have a problem when try to create confidence envelopes
in spatstat.
I have a point data representing firms in my study area.

When I try to create confidence envelopes the error message turns up:

[> p <- envelope(point, fun=Kest, nsim=99)
Error in marks.ppp(Y, dfok = FALSE) : 
  Sorry, not implemented when the marks are a data frame]

Could you write me how can I solve this problem please?

Thank you
Pavel 



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