How to use parfor to delete the first c elements of each cell of b?

Question

Chaoyang Jiang 2018-5-15

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/400767-how-to-use-parfor-to-delete-the-first-c-elements-of-each-cell-of-b

评论： Image Analyst 2018-5-15

How to use parfor to delete the first c elements of cell b?

Error: The variable b in a parfor cannot be classified.

b=cell(1000,1);
c=randi(2,1000,1);
parfor m=1:1000
    b{m,1}(1:c(m))=[];
end

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2018-5-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/400767-how-to-use-parfor-to-delete-the-first-c-elements-of-each-cell-of-b#answer_320225

在 MATLAB Online 中打开

Try this:

b=cell(1000,1); % Initialize to empty cells.
c = 10; % Whatever.
% Delete the first c cells
b(1:c) = [];
% Check that we have 9990 cells now.
whos b

2 个评论
显示无隐藏无

Chaoyang Jiang 2018-5-15

在 MATLAB Online 中打开

Thank you for your answer. I want to delete the first c elements of each cell of b. E.g,

b{1,1}=[1 3 4];
c(1)=2;
b{1,1}c(1)=[];
then b{1,1}={4}

Image Analyst 2018-5-15

在 MATLAB Online 中打开

Try this then:

% Create some random b
b = cell(10, 1);
for k = 1 : length(b)
  b{k} = randi(99, 1, 5);
end
celldisp(b);
% Define c - it's random for each cell of b.
c = randi(4, length(b), 1)
% Use each c to delete that many elements from 
% the corresponding cell of b
for k = 1 : length(b)
  thisCell = b{k};
  b{k} = thisCell(c(k)+1:end);
end
celldisp(b);
% or use cellfun().