null (Matlab function)

null(a)
null(a, 'r')
% No equivalent
% No equivalent

kernel(a)
// No equivalent
kernel(a, tolerance)
kernel(a, tolerance, "qr")

a = [1 3 2; 2 -3 -5];
null(a)
size(null(a),2)

a = [1 3 2; 2 -3 -5];
kernel(a)
size(kernel(a),2) // Nullity of a