concatenate structs and then plot a specified column

조회 수: 1 (최근 30일)
Gaetano Pavone
Gaetano Pavone 2019년 10월 15일
다시 열림: Adam Danz 2021년 8월 22일
I have the following folder, named Dati_Finali:
folder.JPG
Each mat file contains a single variable named dati_finali, see the following figure, with different number of rows but equal number of columns:
cell.JPG
I would like to concatenate all the dati_finali cells vertically and then plot a specified column.
How can I do this? Thanks

답변 (1개)

Adam Danz
Adam Danz 2019년 10월 15일
편집: Adam Danz 2019년 10월 15일
Use dir() to list all files in the directory.
Loop through each file and load in the variable using load(filename,variables)
From within your loop you can vertically concatenate like so
C = [];
for i = 1:numberOfFiles
vars = load('filename','dati_finali')
C = [C;vars.dati_finali];
% ^ vertical concatenation
end
Then plot colun number 'n' by
plot(C(:,n))
If you have trouble putting any of this together, feel free to comment below and include the code.
  댓글 수: 6
Gaetano Pavone
Gaetano Pavone 2019년 10월 15일
편집: Gaetano Pavone 2019년 10월 15일
I want to delete the first row of the uploaded matrices, except for the first one. If i use your code all first rows will be eliminated.
Moreover, plot of the 16th column is:
heights=C(:,16);
plot(cell2mat(heights(:,1)))
Adam Danz
Adam Danz 2019년 10월 15일
편집: Adam Danz 2019년 10월 16일
"I want to delete the first row of the uploaded matrices, except for the first one. "
That's what conditional statements are for.
for i=3:4
vars = load(file(i).name,'dati_finali')
if i==3 % <--3 because your i-loop starts with 3
Cnew = vars.dati_finali;
else
Cnew = vars.dati_finali(2:end,:);
end
C = [C; Cnew];
end
About your cell array, what's stored in that array? Are they all numbers or is there a mix of numbers and strings/characters or other stuff? The solution for plotting the n_th column will depend on what's in those arrays.

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