The data cannot be plotted because it is incompatible with the size

i m new to matlab ,i m facing problem for step and impulse response of transfer function...

My code is.....

num=25*[0.4 1];
den=conv([0.16 1],[1 6 25]);
G=tf(num,den)
step(G)

step and impuse is not working although plot window appear but blank.

any one can solve this ??

Answer 1

[madhan ravi]

clear tf
F = figure(1);
step(G)
shg