Subscripted assignment dimension mismatch using text value

I have a vector u(1,1) = 6 and a vector delta_hat = [1,2,3,4,5,6]'

I have tried to create a function so that when the value is even it will populate the existing element with 'X_naught' and if odd populate 'Y_naught':

for i = 1:u(1,1)

if mod(delta_hat(i,1),2) == 0

    delta_hat(i,1) = 'X_naught'

%number is even

else

delta_hat(i,1) = 'Y_naught'

%number is odd

end

end

Why am I getting the above error?

Answer 1

[Image Analyst]

You need to use a cell array instead of a regular numerical array because you'll be mixing numbers and strings. Read about cell arrays here:

http://matlab.wikia.com/wiki/FAQ#What_is_a_cell_array.3F

Answer 2

[Star Strider]

Your original ‘delta_hat’ is defined as a (1x6) double vector. You need to define a new array (I called it ‘delta_str’ here), and adding a dimension to ‘delta_str’ to accommodate the length.

With those few modifications, it works:

u(1,1) = 6;
delta_hat = [1,2,3,4,5,6];

for i = 1:u(1,1)

      if mod(delta_hat(i),2) == 0

          delta_str(i,:) = 'X_naught';

      %number is even

      else

          delta_str(i,:) = 'Y_naught';

       %number is odd

      end

end