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StrVarOrDefault

StrVarOrDefault (pathStr, defStrVal)​

The StrVarOrDefault function checks to see if the pathStr points to a string variable. If the string variable exists, StrVarOrDefault returns its value. If the string variable does not exist, returns defStrVal instead.

Details​

Used to initialize input values of macros so they can remember their state without needing global variables to be defined first. Numeric variables use the corresponding numeric function, NumVarOrDefault.

Examples​

Macro foo(nval,sval)

	Variable nval=NumVarOrDefault("root:Packages:mypack:nvalSav",2)

	String sval=StrVarOrDefault("root:Packages:mypack:svalSav","Hi")



	DFREF dfSav= GetDataFolderDFR()

	NewDataFolder/O/S root:Packages

	NewDataFolder/O/S mypack

	Variable/G nvalSav= nval

	String/G svalSav= sval

	SetDataFolder dfSav

End