how to add the first row all the odd columns by step of 2 odd columns

조회 수: 1 (최근 30일)
I want to add 1 and 3 the 2 and 1. Then moving to second row I want to add 1 and 1 then 4 and 5. Similarly I want to, in general, using using loop for an image
a = [...
1 2 3 1
1 4 1 5
5 8 5 9
1 9 2 1]
  댓글 수: 2
madhan ravi
madhan ravi 2018년 9월 1일
What’s your required output ? Can you give an example?
juveria fatima
juveria fatima 2018년 9월 1일
i want to add first column with third ,then fifth column to be added with seventh in short (i want to add all the odd columns) then even columns to added

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madhan ravi
madhan ravi 2018년 9월 1일
편집: madhan ravi 2018년 9월 1일
Try this:
a1=a(:,1:2:end) %for odd columns
a2=a(:,2:2:end) %for even columns
oddcolumns=sum(a1,2)
evencolumns=sum(a2,2)
a
  댓글 수: 15
juveria fatima
juveria fatima 2018년 9월 1일
consider this as encoding code where a is encoded as odd columns and even columns
a=[1 2 3 1;1 4 1 5;5 8 5 9;1 9 2 1]
a1=a(:,1:2:end) %for odd columns
a2=a(:,2:2:end) %for even columns
oddcolumns=sum(a1,2)
evencolumns=sum(a2,2)
now i want its inverse i.e decoding back to a ( output should be a )

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