Matlab quad help - urgent! I'm trying to use the quad function to evaluate the integral of the magnitude of y'(x) where y(x)= (-3cos(t), -2sin(t), t) from 0 to 2pi. Code so far: v = [-3*sin(t), -2*cos(t), 1]; j=norm(v) F = @(t)norm(v) ANS1 = quad(F,0,2*pi) Error: ??? Index exceeds matrix dimensions. Error in ==> quad at 85 if ~isfinite(y(7)) Thanks so much for any help!!!!