Erorr in my code

Hello everyone,

I am using Matlab 2015a. The code I wrote gives an error. How can I fix the error?

this is my code:

newM = birincifaz.*(1:size(birincifaz,1))';

newM(:,1)=[];

for k=1:size(newM,2)

r=unique(newM(:,k));

r=r(r~=0);

B(:,k)=r(randi(length(r),50,1));

end

----------

Error using .*

Matrix dimensions must agree.

Error in sonhal3 (line 2)

newM = birincifaz.*(1:size(birincifaz,1));

Answer 1

[Image Analyst]

You're trying to multiply a 2-D matrix by a 1-D column vector that goes from 1 to the number of rows. This will not work in R2015a but will work in later versions where implicit expansion of the column vector to a 2-D matrix will occur. Please upgrade or else use a for loop to do the multiplication

% First way using implicit expansion
birincifaz = randi(9, 3, 5)

birincifaz = 3×5

8 1 1 2 3 8 8 9 3 5 1 1 9 1 3

newM = birincifaz.*(1:size(birincifaz,1))'

newM = 3×5

8 1 1 2 3 16 16 18 6 10 3 3 27 3 9

% Alternate way using a for loop
[rows, columns] = size(birincifaz)

rows = 3

columns = 5

newM = zeros(rows, columns);
for col = 1 : columns
    for row = 1 : rows
        newM(row, col) = birincifaz(row, col) * row;
    end
end
newM

newM = 3×5

8 1 1 2 3 16 16 18 6 10 3 3 27 3 9

[Esra Demirbilek]

thank you so much