Searching in cell arrays.
조회 수: 1 (최근 30일)
이전 댓글 표시
hi i have 2 cell arrays:
array1={6x6 double;6x6 double} & its elements are:
array1{1,1}=[0,0,0,0,0,0;0,0,0,0,0,0;0,2,0,0,0,0;1,2,3,4,0,0;0,0,0,0,0,0;0,0,0,0,0,0]
array1{2,1}=[0,0,3,4,0,0;1,0,3,4,0,0;0,2,0,0,0,0;1,2,3,4,0,0;0,0,0,0,0,0;0,0,0,0,0,0]
second cell array is:
array2={{[3;4]};[1;2;3;4]}
i want to search all elements of array2 (one by one) in corresponding cell of array1 and if found replace it with its row index.
Thanks in advance.
댓글 수: 2
Rik
2017년 4월 5일
I don't understand what exactly it is that you want to do. One part of that is that code is not readable. Use the {}Code button.
What do you expect the outcome to be?
채택된 답변
Guillaume
2017년 4월 5일
편집: Guillaume
2017년 4월 5일
I'm not entirely sure of the output you want. Maybe:
function rows = findrow(matrix, value)
%find the rows of matrix where value is found
[rows, ~] = find(matrix == value);
rows = unique(rows);
end
Used with your cell arrays:
array1 = {[0,0,0,0,0,0;0,0,0,0,0,0;0,2,0,0,0,0;1,2,3,4,0,0;0,0,0,0,0,0;0,0,0,0,0,0];
[0,0,3,4,0,0;1,0,3,4,0,0;0,2,0,0,0,0;1,2,3,4,0,0;0,0,0,0,0,0;0,0,0,0,0,0]};
array2 = {[3;4]; [1;2;3;4]}; %I assume the cell array within cell array was a typo
out = cellfun(@(m, v) arrayfun(@(v) findrow(m, v), v, 'UniformOutput', false), ...
array1, ...
array2, ...
'UniformOutput', false)
댓글 수: 3
추가 답변 (1개)
Andrei Bobrov
2017년 4월 6일
another variant
m - file:
function out = findrows(a,b)
[~,ii] = ismember(a,b);
[i1,~] = find(ii);
out = accumarray(ii(ii > 0),i1,[],@(x){unique(x)});
end
using:
out = cellfun(@(x,y)findrows(x,y),array1,array2,'un',0);
참고 항목
카테고리
Help Center 및 File Exchange에서 Matrix Indexing에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!