write data of textfile with different amount of value in cell array

Question

Bruce Rogers 2021-7-1

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https://ww2.mathworks.cn/matlabcentral/answers/870078-write-data-of-textfile-with-different-amount-of-value-in-cell-array

评论： Bruce Rogers 2021-7-1

Hello everyone,

I wanted to ask if there is a possibility to create a matrix/cell array with different amount of rows? I'm trying to get the fourth column of the attached files into one matrix/cell array, but it doesn't work.

here is my attempt:

irl = readtable("min_vel12_halfpi.txt");
z_irl_temp = irl{:,4};
z_irl{:,1} = z_irl_temp;
irl = readtable("min_vel12_1pi.txt");
z_irl_temp = irl{:,4};
z_irl{:,2} = z_irl_temp;
irl = readtable("min_vel12_2pi.txt");
z_irl_temp = irl{:,4};
z_irl{:,3} = z_irl_temp;
irl = readtable("min_vel12_4pi.txt");
z_irl_temp = irl{:,4};
z_irl{:,4} = z_irl_temp;
irl = readtable("min_vel12_8pi.txt");
z_irl_temp = irl{:,4};
z_irl{:,5} = z_irl_temp;

but I keep getting this error code:

Unable to perform assignment because brace indexing is not supported for variables of this type.

How can I solve this problem? Thanks for your ideas and your help!

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Sam 2021-7-1

在 MATLAB Online 中打开

Matrices can't be used for different row sizes. Use cell array to do so.

z_irl = cell(1,5);
irl = readtable("min_vel12_halfpi.txt");
z_irl_temp = irl{:,4};
z_irl{1,1} = z_irl_temp;
%similarly add values for z_irl{1,2}, z_irl{1,3}, z_irl{1,4} and so on

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Answer 1

Sam 2021-7-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/870078-write-data-of-textfile-with-different-amount-of-value-in-cell-array#answer_737928

在 MATLAB Online 中打开

Matrices can't be used for different row sizes. Use cell array to do so.

z_irl = cell(1,5);
irl = readtable("min_vel12_halfpi.txt");
z_irl_temp = irl{:,4};
z_irl{1,1} = z_irl_temp;
%similarly add values for z_irl{1,2}, z_irl{1,3}, z_irl{1,4} and so on