Checks if a Scilab module is installed
r = with_module(module_name)
a boolean
a string, for example : 'core'
'core'
Returns %t if a Scilab module module_name is installed or %f if not.
%t
module_name
%f
withXML = with_module("xml"); if withXML == %t then disp("XML module enabled"); else disp("XML module disabled"); end