Data with different length of rows

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Sara Boznik 2020-8-26

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https://ww2.mathworks.cn/matlabcentral/answers/584975-data-with-different-length-of-rows

评论： Star Strider 2020-8-26

采纳的回答： Star Strider

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Hi

I have following question. I have data like this:

1 2 3 4 5 6 7 8 9

1 2 3 4

1 2

I want to calculate average of each row.

I have following code:

row=load('file.txt')
n=length(row(:,1))
[n,m]=size(row)
for i=1:n
    avg(i)=mean(row(i,:))
end

Unfornatelly does not work, I got the error:

Unable to read file 'filei.txt'. Input must be a MAT-file or an ASCII file containing numeric data with

same number of columns in each row.

I have no idea what to do, do you have any advice?

Any help is aprriciated.

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Answer 1

Star Strider 2020-8-26

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https://ww2.mathworks.cn/matlabcentral/answers/584975-data-with-different-length-of-rows#answer_485456

在 MATLAB Online 中打开

Try this:

fidi = fopen('file.txt','rt');
k = 1;
while ~feof(fidi)
    row = fgetl(fidi);
    avg(k,:) = mean(str2num(row));
    k = k+1;
end
fclose(fidi);

With:

RowMeans = avg

producing:

RowMeans =
0000
5000
5000

.

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Sara Boznik 2020-8-26

Thank you so much, that works.

Star Strider 2020-8-26

As always, my pleasure!

A better option would be str2double rather than str2num. I thought of that later. (The result would not change.)

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Data with different length of rows

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