concatenate structs and then plot a specified column

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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

回答(1 个)

Adam Danz
Adam Danz 2019-10-15
编辑:Adam Danz 2019-10-15
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.
  6 个评论
Gaetano Pavone
Gaetano Pavone 2019-10-15
编辑:Gaetano Pavone 2019-10-15
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 2019-10-15
编辑:Adam Danz 2019-10-16
"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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