필터 지우기
필터 지우기

Generating A(i,j) = [i; j]

조회 수: 23 (최근 30일)
Jeong Ho
Jeong Ho 2012년 12월 4일
Hi, is there a clean way to generate a matrix A(i,j) = [i; j], especially without resorting to loops? Thank you so much!
  댓글 수: 1
Jonathan Epperl
Jonathan Epperl 2012년 12월 4일
No, that would not be a matrix, since you're assigning a vector to the element at (i,j). Do you want to create a 3-dim array, or a cell array, or a blockmatrix? Please modify your question accordingly.

댓글을 달려면 로그인하십시오.

채택된 답변

Matt Fig
Matt Fig 2012년 12월 4일
편집: Matt Fig 2012년 12월 4일
You want each element of your matrix to be a two element vector?
That is not a matrix, but it does sound like a cell array.
C = num2cell(cumsum(ones(5),2));
C = cellfun(@(x,y) [x;y],C,C.','Un',0)

추가 답변 (1개)

Walter Roberson
Walter Roberson 2012년 12월 4일
편집: Walter Roberson 2012년 12월 4일
No. Numeric matrices cannot store multiple items per location.
Cell arrays can store vectors in each location, but then A(i,j) would not be the vector [i;j] and would instead be the 1 x 1 cell array that contained within it the vector [i;j]
Perhaps you would like a 3D array instead.
[P, Q] = ndgrid(1:5, 1:7); %sample bounds
A = cat(3, P, Q);
You could convert to a cell array:
mat2cell(A, ones(1,size(A,1)), ones(1,size(A,2)), 2)

카테고리

Help CenterFile Exchange에서 Shifting and Sorting Matrices에 대해 자세히 알아보기

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by