Combine multiple columns into one column

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Ali Osman Gökcan
Ali Osman Gökcan le 12 Déc 2022
Hi. There is a table with the content in the image. I used the following code to convert the data in the 2nd column to integers:
matrix = PersontrainingData{:,:};
second_column = cell2mat(matrix(:, 2));
second_column = round (second_column);
Now I want to put together the first column in the picture (imagefilename) and the 4 columns I got after rounding, but I can't. I made various experiments and got results, but I do not share it so as not to prolong the topic. Thank you for your interest and have a nice day...

Réponse acceptée

Voss le 13 Déc 2022
If you want to replace the original (unrounded) second column with a rounded version, try this:
% a table similar to yours:
PersontrainingData = table({'file1.png';'file2.png'},{[630 195 30 38];[626.9255 194.9444 29.7777 37.7592]}, ...
'VariableNames',{'imageFilename' 'person'})
PersontrainingData = 2×2 table
imageFilename person _____________ _____________________________________ {'file1.png'} {[ 630 195 30 38]} {'file2.png'} {[626.9255 194.9444 29.7777 37.7592]}
% replace of the existing "person" variable with its rounded values:
PersontrainingData.person = cellfun(@round,PersontrainingData.person,'UniformOutput',false)
PersontrainingData = 2×2 table
imageFilename person _____________ _________________ {'file1.png'} {[630 195 30 38]} {'file2.png'} {[627 195 30 38]}
  2 commentaires
Voss le 13 Déc 2022
You're welcome! Have a nice day.

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Plus de réponses (1)

Jiri Hajek
Jiri Hajek le 12 Déc 2022
Hi, I believe you are almost there... To make the discussion simple, let's consider just one of the filenames. You need to make sure you have a variable (e.g. "fileName") containing the vector of characters (char array). Then you can separate parts of the filename using the fileparts function like this:
[filepath,name,ext] = fileparts(fileName)
Now you will be able to e.g. append your integer (myInteger) to the filename, for which you must turn it into char using num2str function like this:
newFileName = [name,num2str(myInteger)]
Hope this answers your question.
  3 commentaires
Ali Osman Gökcan
Ali Osman Gökcan le 13 Déc 2022
I will take into account what you said. Thank you for being with me in my journey of program development with Matlab.

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