Error: Dist not found

[Rogerio Santos]

Hello, I'm trying to calculate the Silhouette coefficient after applying a cluster analysis, I'm using the following code:

egen idvar = seq(), from(1) to(`=_N') block(1)
gen dist = .
replace dist = sqrt((age - age[_N])^2 + (monthly_expenses - monthly_expenses[_N])^2)
gen silhouette_var = .
silhouette silhouette_var, idvar(idvar) distmat(dist) cluster(Groups)

As you can see the "dist" variable is created, but when calculating the coefficient, the program says it can't find it. Does anyone have any idea what the error is?

[Andrew Musau]

This command is unknown to me. Please refer to FAQ Advice #12 regarding the requirement to state the provenance of community-contributed commands. My guess is that

distmat(dist)

refers to a matrix and not a variable. Look at the documentation and if this does not help, contact the authors.

[George Ford]

I think you need to create a matrix of dist.

mkmat

https://www.stata.com/meeting/france17/slides/France17_Halpin.pdf