Tests if a PV‑WAVE variable is a scalar (not an array).

wvh—The Wave variable handle of the variable.

Returns 1 if the variable is a scalar. Returns 0 if the variable is not a scalar and returns –1 if wvh is not a valid Wave variable handle.

For scalar structures, this function returns 1 (TRUE) while wvh_dimensions does not return 0. This is because internally PV‑WAVE stores structure-type variables in an array even if the variable is a scalar (1 element). So, if you want to know if a structure- type variable is a scalar (1 element) or an array of type structure, use this function rather than wvh_dimensions. If you use wvh_dimensions and it returns 1, you need to look at the dims[] array to determine if it is a scalar variable or an array of type structure.