Removing empty cells from cell array

조회 수: 13 (최근 30일)
Joel Schelander
Joel Schelander 2021년 3월 26일
댓글: Joel Schelander 2021년 3월 26일
G is a cell array:
G={16x16 cell 16x16 cell 16x16 cell 16x16 cell 16x16 cell 16x16 cell}
Each cell look like this: G{1}=[1 [] 3 ; 4 [] 7]; (but 16x16)
I want to remove these empty cells []. I have tried
index = cellfun(@isempty, G) == 0;
Gnew = G(index)
Without success. How can I solve this?
  댓글 수: 2
Stephen23
Stephen23 2021년 3월 26일
Ran in:
"Each cell look like this: G{1}=[1 [] 3 ; 4 [] 7]; "
I doubt that, as numeric arrays must be rectangular and cannot contain "holes":
[1,[],3;4,[],7]
ans = 2×2
1 3 4 7
Please upload some sample data in a mat file by clicking on the paperclip button.
Joel Schelander
Joel Schelander 2021년 3월 26일
It is the output of several for loops, looks like this (see attached mat file)

댓글을 달려면 로그인하십시오.

이 질문에 답변하려면 로그인하십시오.

채택된 답변

Stephen23
Stephen23 2021년 3월 26일
편집: Stephen23 2021년 3월 26일
Ran in:
Most likely converting the nested cell array to numeric arrays is going to make processing your data easier:
S = load('G.mat');
GUD = S.GUD
GUD = 1×6 cell array
{16×16 cell} {16×16 cell} {16×16 cell} {16×16 cell} {16×16 cell} {16×16 cell}
GUD{1}
ans = 16×16 cell array
{0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 4.1165]} {[ 5.8874]} {[ 5.8474]} {0×0 double} {[ 5.8874]} {[ 4.5514]} {[ 6.3844]} {0×0 double} {[ 5.8474]} {[ 6.3844]} {[ 4.4562]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 5.8874]} {[ 6.3844]} {0×0 double} {0×0 double} {[ 6.3844]} {[ 5.8474]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 5.8874]} {0×0 double} {[ 6.3844]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 6.3844]} {0×0 double} {[ 6.3844]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 5.8474]} {[ 6.3844]} {0×0 double} {0×0 double} {[ 6.3844]} {[ 6.3844]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 5.8874]} {[ 6.3844]} {0×0 double} {0×0 double} {[ 6.3844]} {[ 5.8474]} {[ 4.1165]} {0×0 double} {[ 5.8874]} {[ 5.8474]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 5.8874]} {0×0 double} {[ 4.2759]} {[ 5.8416]} {[ 5.8474]} {0×0 double} {[ 5.8416]} {[ 4.3722]} {[ 5.8874]} {0×0 double} {0×0 double} {[ 6.3844]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 6.3844]} {0×0 double} {0×0 double} {[ 5.8416]} {[ 5.8474]} {0×0 double} {[ 6.3844]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 6.3844]} {0×0 double} {[ 5.8416]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 5.8874]} {0×0 double} {[ 6.3844]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 6.3844]} {0×0 double} {[ 6.3844]} {[ 5.8874]} {0×0 double} {0×0 double} {[ 6.3844]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 6.3844]} {0×0 double} {0×0 double} {[ 5.8416]} {[ 4.5514]} {[ 5.8874]} {0×0 double} {[ 6.3844]} {[ 5.8874]} {[ 4.2759]} {0×0 double} {[ 5.8416]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 6.3844]} {[ 5.8416]} {0×0 double} {[ 4.7729]} {[ 6.3844]} {[ 6.3844]} {0×0 double} {0×0 double} {[ 6.3844]} {[ 5.8416]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 5.8474]} {[ 6.3844]} {0×0 double} {0×0 double} {[ 6.3844]} {[ 6.3844]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 5.8474]} {0×0 double} {[ 6.3844]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 6.3844]} {0×0 double} {[ 5.8416]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 6.3844]} {[ 6.3844]} {0×0 double} {0×0 double} {[ 6.3844]} {[ 5.8416]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {[ 4.4562]} {[ 5.8474]} {[ 6.3844]} {0×0 double} {[ 5.8474]} {[ 4.3722]} {[ 5.8416]} {0×0 double} {[ 6.3844]} {[ 5.8416]} {[ 4.7729]} {0×0 double} {0×0 double} {0×0 double} {0×0 double} {0×0 double}
Convert:
for k = 1:numel(GUD)
idx = ~cellfun(@isempty,GUD{k});
tmp = zeros(size(GUD{k})); % or perhaps NAN.
tmp(idx) = [GUD{k}{idx}];
GUD{k} = tmp;
end
Checking:
GUD
GUD = 1×6 cell array
{16×16 double} {16×16 double} {16×16 double} {16×16 double} {16×16 double} {16×16 double}
GUD{1}
ans = 16×16
0 0 0 0 0 4.1165 5.8874 5.8474 0 5.8874 4.5514 6.3844 0 5.8474 6.3844 4.4562 0 0 0 0 0 0 0 0 0 0 5.8874 6.3844 0 0 6.3844 5.8474 0 0 0 0 0 5.8874 0 6.3844 0 0 0 0 0 6.3844 0 6.3844 0 0 0 0 0 5.8474 6.3844 0 0 6.3844 6.3844 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5.8874 6.3844 0 0 6.3844 5.8474 4.1165 0 5.8874 5.8474 0 0 0 0 5.8874 0 4.2759 5.8416 5.8474 0 5.8416 4.3722 5.8874 0 0 6.3844 0 0 0 0 0 0 0 0 6.3844 0 0 5.8416 5.8474 0 6.3844 0 0 0 0 0 6.3844 0 5.8416 0 0 0 0 0 0 0 0 0 0 5.8874 0 6.3844 0 0 0 0 0 6.3844 0 6.3844 5.8874 0 0 6.3844 0 0 0 0 0 0 0 0 6.3844 0 0 5.8416
If you really want to keep the (very inefficient and difficult to work with) nested cell arrays containing scalar numerics, then something like this:
for k = 1:numel(GUD)
idx = ~cellfun(@isempty,GUD{k});
GUD{k}(idx) = {0};
end

추가 답변 (0개)

카테고리

Help Center 및 File Exchange에서 Characters and Strings에 대해 자세히 알아보기

태그

제품


릴리스

R2019a

Community Treasure Hunt

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

Start Hunting!

Translated by