How to assign NaN to an empty cells in array for data arrangement?

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arifahazwani AY 2021-3-4

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https://ww2.mathworks.cn/matlabcentral/answers/762481-how-to-assign-nan-to-an-empty-cells-in-array-for-data-arrangement

评论： KALYAN ACHARJYA 2021-3-5

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Hi,

Currently, I'm trying to arrange my data in .txt. file of certain column in an .xls file.

But I got this error, as the dimension of each selected column of the .txt file are not similar.

Error using horzcat

Dimensions of arrays being concatenated are not consistent.

I plan to assign NaN to the empty cell to obtain similar dimension of each data.

What are the best solution for this problem?

Attached herewith the .txt. file and command I had tried.

S1 = importdata ('s1.txt');
%Read the data
GRFX1 = S1.data(:,2);
GRFY1 = S1.data(:,3);
GRFZ1 = S1.data(:,4);
S2 = importdata ('S2 0.txt');
%Read the data
GRFX2 = S2.data(:,2);
GRFY2 = S2.data(:,3);
GRFZ2 = S2.data(:,4);
S_1 = [GRFX1,GRFY1,GRFZ1];
S_2 = [GRFX2,GRFY2,GRFZ2];
GRFX=[GRFX1, GRFX2];
GRFY=[GRFY1, GRFY2];
GRFZ=[GRFZ1, GRFZ2];
%Arrange the data in one sheet before convert to .xls file
N = [S_1, S_2];
GRF = [GRFX, GRFY, GRFZ];

Thank you in advance!

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Answer 1

KALYAN ACHARJYA 2021-3-4

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/762481-how-to-assign-nan-to-an-empty-cells-in-array-for-data-arrangement#answer_638761

编辑：KALYAN ACHARJYA 2021-3-4

Please try with readtable, it replaces all missing data with NaN.

Note: Text files have unwanted header descriptions, you can delete them so that there is no problem when analyzing both files. However, if both files have different length data (originally), then you have the following options