[R] Spatstat - Kest, envelope problem

Rolf Turner rolf.turner at xtra.co.nz
Thu Feb 7 23:55:48 CET 2013

P. S.  I just noticed that you referred to the envelopes produced as
"confidence" envelopes.

They are ***NOT*** confidence envelopes!!!  They are "critical" envelopes.
This is a very different concept.  Repeat after me, 50 times:

     critical envelopes, critical envelopes, critical envelopes, .....


         Rolf Turner

On 02/08/2013 02:57 AM, Pavel_K wrote:
> 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?

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