Matrix calculation, sum of two rows in each column

I have a matrix d and I want to calculate for every column the sum of each to numbers. The Result should be the result matrix

    d=  2  3  7                            
        6  7  8
        9  1  5
        4  3  5
        6  7  8
        2  3  6

result=  8  10  15 
        13   4  10
         8  10  14

      result=[];
  [x,y]=size(d);
      for y=1:length(d(:,y))
          for x=1:2:length(d(x,:))
         [x,y]=size(d);
           res=d(x)+d(x+1);
           result=[result res];
          end
      end

I just get a vector consisting of 5. What should I change in the code? Thank you!

[Jos (10584)]

I suggest you debug your code, tracing each step. the variables x and y may not behave as you expect.

Answer 1

[Andrei Bobrov]

    d= [ 2  3  7                            
        6  7  8
        9  1  5
        4  3  5
        6  7  8
        2  3  6];
    result = squeeze(sum(reshape(d',size(d,2),2,[]),2))';

[monmatlab]

Wow.Thank you!

[monmatlab]

how should the function be adjusted if I would like to add (before ) to the sum a multiplication with a constant number (3) i.e.: 2+6 *3=20

[monmatlab]

d1=d2:2:end,:).*3;
d(2:2:end,:)=d1
result = squeeze(sum(reshape(d',size(d,2),2,[]),2))';

I have managed to do it this way

[Andrei Bobrov]

for 2016b

result = squeeze(sum(reshape(d',size(d,2),2,[]).*[1,3],2))'