Collapse

COLLAPSE - Reduces a scalar field within an arrayed structure to a single output vector

VECT = COLLAPSE(STRUC, FIELDNAME) returns array of the scalar data contained in STRUC.FIELDNAME. Any empty entries in STRUC return NaN

VECT = COLLAPSE(STRUC, FIELDNAME, MISSING) Empty entries in STRUC return MISSING instead of NaN

Example:
struc(1).Data = 3;
struc(2).Data = 4;
vect = collapse(struc, 'Data');