I'm trying to plot to function but keep getting an error saying "Vectors must be the same length." how do I fix this

for w = [2,5,8]'

for t = (0:1:6)'

T = 0.15;

y = 1./(sqrt(1+(w*T).^2));

y1 = -atan(w*T);

plot(t,y,t,y1)

legend('input','output')

end

end

[Torsten]

t has length 7, y and y1 both have length 3.

How do you intend to plot a vector with 3 elements against a vector with 7 elements ?

Before you answer again: How to fix this ?, first tell us what you want to plot against what.

Plotting y and y1 against t with

y = 1./(sqrt(1+(w*t).^2));

y1 = -atan(w*t);

only works if you use only one element of the w-vector, not three at a time.

Answer 1

[David Hill]

Not sure what you are trying to do. There is no t in your questions, only a single variable w. Why the for-loops?

[w,t]=meshgrid([2 5 8],0:6);
y = 1./(sqrt(1+(w.*t).^2));   
y1 = -atan(w.*t);
surf(t,w,y);
figure;
surf(t,w,y1);