Hello,

I am trying to edit a spatial weighting matrix created by the

I have the following code to do so, where spatial_weights is a weighting matrix created with spmatrix create:

What I get as a result is a matrix of indeed same entries for all the previously non-zero entries, but they all take the value of .01065647570978. Any ideas of what am I doing wrong?

I am trying to edit a spatial weighting matrix created by the

*spmatrix create*command in Stata. I would like to replace all the non-zero entries (>0) with 1, but this seems to not be working.I have the following code to do so, where spatial_weights is a weighting matrix created with spmatrix create:

Code:

spmatrix matafromsp W id = spatial_weights mata: for (i=1; i<=rows(W); i++) { for (j=1; j<=cols(W); j++) { if (W[i,j]:>0) W[i,j]=1 } } end spmatrix spfrommata spatial_weights = W id, replace

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