How to convert a cell array to a compatible matrix?
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
Nandha Kumar
am 16 Jul. 2021
Kommentiert: Nandha Kumar
am 17 Jul. 2021
I have a cell array which is filled with matrices of varying size, could you help me to convert it to matrix with filling zeros at in between columns,
in this case the matrix size is ought ot be 41x 41 of double type.
1 Kommentar
Akzeptierte Antwort
Jan
am 16 Jul. 2021
Bearbeitet: Jan
am 16 Jul. 2021
CC = {rand(9,9), rand(5,4), rand(5,4), rand(6,4), rand(6,4), rand(8,4), rand(8,4), rand(9,4), rand(9, 4); ...
rand(4,5), rand(4,4), [], [], [], [], [], [], []; ...
[], [], rand(4,4), [], [], [], [], [], []; ...
rand(4,6), [], [], rand(4,4), [], [], [], [], []; ...
[], [], [], [], rand(4,4), [], [], [], []; ...
rand(4,6), [], [], [], [], rand(4,4), [], [], []; ...
[], [], [], [], [], [], rand(4,4), [], []; ...
rand(4,6), [], [], [], [], [], [], rand(4,4), []; ...
[], [], [], [], [], [], [], [], rand(4,4)};
C = CC;
S1 = cellfun('size', C, 1);
maxS1 = max(S1, [], 2);
S2 = cellfun('size', C, 2);
maxS2 = max(S2, [], 1);
for i2 = 1:size(C, 2)
for i1 = 1:size(C, 1)
X = C{i1, i2};
if size(X, 1) < maxS1(i1) || size(X, 2) < maxS2(i2)
X(maxS1(i1), maxS2(i2)) = 0;
C{i1, i2} = X;
end
end
end
Result = cell2mat(C);
Cheaper:
C = CC;
S1 = cellfun('size', C, 1);
maxS1 = max(S1, [], 2);
S2 = cellfun('size', C, 2);
maxS2 = max(S2, [], 1);
Result2 = zeros(sum(maxS1), sum(maxS2));
c1 = 1;
for i1 = 1:size(C, 1)
c2 = 1;
for i2 = 1:size(C, 2)
X = C{i1, i2};
Result2(c1:c1 + size(X,1) - 1, c2:c2 + size(X,2) - 1) = X;
c2 = c2 + maxS2(i2);
end
c1 = c1 + maxS1(i1);
end
isequal(Result, Result2)
It took some tome to create some test data as input. Please care for providing some code, which creates your input data, to make answering as easy as possible.
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Matrix Indexing finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!