;+
;FUNCTION: dimen1
;INPUT: matrix
;RETURNS: scaler int: size of first dimension (1 if dimension doesn't exist)
;
;CREATED BY: Davin Larson
;LAST MODIFICATION; @(#)dimen1.pro 1.3 95/08/24
;-
function dimen1, matrx
s = size(matrx)
if s[0] lt 1 then return,1 ; scalar
return, s[1]
end