How to properly delete cell element ?

687 次查看（过去 30 天）
RuiQi
RuiQi 2016-6-27
评论： Josep Llobet 2022-8-3
I have a 1x12 cell. How do i remove the last element in the cell ? I tried cell{end} = [] but it did not work. It only emptied the last cell. I would like the result to be a 1x11 cell

请先登录，再回答此问题。

采纳的回答

goerk
goerk 2016-6-27
use normal brackets
cell(end) = [];
  1 个评论
Guillaume
Guillaume 2016-6-27
The reason being:
  • curly brackets act on the content of a cell(s). It does not affect the container (the cell array) itself, so c{end} refers to what's in the last cell, and therefore c{end} = [] puts an empty matrix in that last cell.
  • round brackets act on the cell array itself. So c(end) refers to the last cell, and c(end) = [] deletes it.

请先登录，再进行评论。

更多回答（3 个）

Ceethal Kottakali Piyus
You have to use round parentheses instead of curly braces (which act on the inner cell values and not on the cells themselves):
cell(end) = [];
  1 个评论
Tong Zhao
Tong Zhao 2022-6-15
编辑：Tong Zhao 2022-6-15
Ran in:
Hi Ceethal,
What if I want to remove the second row of a 2x2 cell array?
cell_arr = {1,2;3,4}
cell_arr = 2×2 cell array
{[1]} {[2]} {[3]} {[4]}
cell_arr(2,:) = []
cell_arr = 1×2 cell array
{[1]} {[2]}
Edit: I just found the expression myself. But I'd like to keep this thread for anyone who's running into the same problem.

请先登录，再进行评论。

Amir Hosein Asaadi
Amir Hosein Asaadi 2021-9-27
I sove it by creating variable again like this:
cell_var = {'var1','var2'};
cell_var = {'var1'};
I hope this work for you.
Josep Llobet
Josep Llobet 2022-8-2
% Cell you want to copy
branques_pixels_new = {[55178] [55593] [62271] [62686] [66858] [67273 123123 12123]}
% element you want to eliminate
n_elm_borrar = 3;
% New cell with the non- element
branques_pixels_new_2 = {};
% Operation
for n_elm = 1:length(branques_pixels_new)
if n_elm ~= n_elm_borrar
branques_pixels_new_2{end+1} = branques_pixels_new{n_elm};
end
end
% New cell
branques_pixels_new_2
  2 个评论
Stephen23
Stephen23 2022-8-2
The simple and efficient MATLAB approach:
branques_pixels_new_2 = branques_pixels_new;
branques_pixels_new_2(n_elm_borrar) = [];

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Logical 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by