Azzera filtri
Azzera filtri

Store all matrices of "for" loop to a file

1 visualizzazione (ultimi 30 giorni)
Dear all,
I have problem of output data "T" (5x4 matrix) of "for loop" to a file, e.g., cvs format. I know that "csvwrite('Data.csv',T)" in the following code is only output the final value of T. I would like to store all "T" matrices in one file. Hope to receive your guilding. Thanks a lot!
A =[ 0 2 6 4 5 2 1
2 0 0 0 0 0 1
0 0 2 1 0 0 1
0 0 0 0 1 1 0];
b = [5.8; 2.4; 1.6; 0.2];
% select 4 columns from 7 columns
colsets = nchoosek(1:7,4);
nCombinations = size(colsets,1) % number of combinations
for i = 1:nCombinations
a = A(:,colsets(i,:));
if rank(a) >= 4
x = a \ b;
if (x(:,:)>=0) & (x(:,:)~=Inf)
T = [a;x'] % 5x4 matrix
csvwrite('Data.csv',T);
end
end
end

Risposta accettata

Ameer Hamza
Ameer Hamza il 4 Giu 2020
Modificato: Ameer Hamza il 4 Giu 2020
Try this
A =[ 0 2 6 4 5 2 1
2 0 0 0 0 0 1
0 0 2 1 0 0 1
0 0 0 0 1 1 0];
b = [5.8; 2.4; 1.6; 0.2];
% select 4 columns from 7 columns
colsets = nchoosek(1:7,4);
nCombinations = size(colsets,1) % number of combinations
T = [];
for i = 1:nCombinations
a = A(:,colsets(i,:));
if rank(a) >= 4
x = a \ b;
if (x(:,:)>=0) & (x(:,:)~=Inf)
T = [T;a;x'] % 5x4 matrix
end
end
end
csvwrite('Data.csv',T);
Alternatively, if you have R2019a or later
A =[ 0 2 6 4 5 2 1
2 0 0 0 0 0 1
0 0 2 1 0 0 1
0 0 0 0 1 1 0];
b = [5.8; 2.4; 1.6; 0.2];
% select 4 columns from 7 columns
colsets = nchoosek(1:7,4);
nCombinations = size(colsets,1) % number of combinations
for i = 1:nCombinations
a = A(:,colsets(i,:));
if rank(a) >= 4
x = a \ b;
if (x(:,:)>=0) & (x(:,:)~=Inf)
T = [a;x'] % 5x4 matrix
writematrix(T, 'Data.csv', 'WriteMode', 'append');
end
end
end
  2 Commenti
Thuy Tran
Thuy Tran il 4 Giu 2020
Thanks a lot! It really helpful to me. When I have R2019a or later, I will try the second way.
Ameer Hamza
Ameer Hamza il 5 Giu 2020
I am glad to be of help!

Accedi per commentare.

Più risposte (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by