Re: [R-sig-Geo] Creating listw object from n by n matrix

2011-05-05 Thread Roger Bivand
On Sun, 1 May 2011, Sebastian Brandt wrote: Dear List, I have n datsets that I would like to test for spatial dependence using the lm.LMtests function. I have computed a n by n row-standardised spatial weights matrix that I have imported into R workspace from a csv.-file. Running the

[R-sig-Geo] About SARAR

2011-05-05 Thread Jianhua Huang
Dear All: I am trying to use the gstslshet function to generate the estimate the sarar model. However, there is an error occur as following: Error in solve.default(crossprod(reg)) : system is computationally singular: reciprocal condition number = 4.38039e-25 Is there anyone

[R-sig-Geo] Simulation of multinomial classes covariate

2011-05-05 Thread TM
Hello everyone, I am looking for a R code to simulate an spatial distribution of multinomial classes (like colors classes) in a map. The problem is find a a multivariate distribution of the color classes (covariate: map colors) and a continous variable (like rain or ph) to study different

Re: [R-sig-Geo] spacetime : adding a fourth (spectral) dimension

2011-05-05 Thread Edzer Pebesma
On 05/04/2011 12:30 AM, scizmeli wrote: I am reflecting on a data structure that will allow us to perform all kinds of spectral operations we normally do in remote sensing. Due to lack of an appropriate data structure supporting spatially based spectral data, right now we have to keep our