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Obtaining a Variable Number from Variable Name
Syntax variable = tpvarnum(name)
See Also tpvarname , tpzonename , tpzonenum

Returns the Tecplot variable number for the variable name specified by the character row vector name in the current data set. If the return value variable is less than 1 then the specified variable name does not exist in the current data set.

If you enter
   fName = [OM_INSTALL,"\example\tecplot\rainfall.plt"] 
   tpvarnum("Dallas Rainfall")
Tecplot will open the rainfall sample file from your distribution and print 3 which is the variable number for "Dallas Rainfall"