Matrix multiplication error using '.*'

%so this is my simply code 
r = randi(100,66);
t = (0:1/55:1);
e = exp(2*pi*i*13*t);
t = r.*e % this gives me error why is it  and how can fix

[KSSV]

Are you looking for this?

%so this is my simply code 

t = (0:1/55:1);
r = randi(size(t));
e = exp(2*pi*i*13*t);
t = r.*e % this gives me error why is it  and how can fix

[AJ Woodson]

No this does not help because I want to do .* to a continious wave as well so size(t) will not work for all my cases.

[KSSV]

You see r is a matrix and t is a array..this is what you want?

[VBBV]

@woodson then you have to divide t into 66. as

%if true
t = 0:1/65:1;

To get what you want.

Answer 1

[madhan ravi]

 t = linspace(0, 1, 66);

[AJ Woodson]

Thank you for the response ideally r is signl and e is a Doppler shift so matrix size would be 66x66 to explain further it would be like x = [2 4 5 2 3 5 6] x.*5 and output would be a x = [10, 20, 25 etc. ideal e in my case is just a scalar if I'm making myself clear where in the example r = x and e = 5

Answer 2

[Walter Roberson]

randi(100,66) creates a 66 x 66 matrix of values 1 to 100.

0:1/55:1 is length 56.

When you .* a 66x66 matrix and a 1x56 matrix then what size of output are you expecting?

[AJ Woodson]

Thank you for the response ideally r is signl and e is a Doppler shift so matrix size would be 66x66 to explain further it would be like x = [2 4 5 2 3 5 6] x.*5 and output would be a x = [10, 20, 25 etc. ideal e in my case is just a scalar if I'm making myself clear where in the example r = x and e = 5

Answer 3

[Andrei Bobrov]

r = randi(100,66);
t = reshape(0:1/55:1,1,1,[]);
e = exp(2*pi*i*13*t);
t = r.*e;