Dear Researcher,

 

I have a shapefile with two columns "a" and "b" and I wish to subtract a-b
to obtain a new column of difference.  I tried in SAGA + R with the module
"Table calculator for shapes". This worked without an error, but it didn't
save the results either. I suspect that this is a bug in the SAGA module. 

 

Is there an another code or packages (without GRASS+R) to do operation with
shapefile?

 

Thanks

 

Ale


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