plot (t,y) ,dimension failure

clear all; close all; clc;
delt=1/100;
t=0:delt:10;
  y=exp(-t/2)*cos(t)
plot(t,y)

when I operate this code matlab program repeat me demension failure

y=exp(-t/2)*cos(t)

Answer 1

[the cyclist]

The answer is right there in the error message. Use elementwise multiplication instead of matrix multiplication.

clear all; close all; clc;
delt=1/100;
t=0:delt:10;
  y=exp(-t/2).*cos(t);
plot(t,y)