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How to do the following nested for loop?

3 Ansichten (letzte 30 Tage)
M
M am 23 Jul. 2023
Kommentiert: Voss am 15 Aug. 2023
How to do the following nested for loop?
if there is a vector P = [1 1 1 1 1 1]
and I want to change P in each loop as the following:
first outer loop
inner loop:
first it:
P = [0.1 1 1 1 1 1]
2nd it:
P = [0.2 1 1 1 1 1]
3rd
P = [0.3 1 1 1 1 1]
and so on until reach 0.9
2nd outer loop
P = [1 0.1 1 1 1 1]
2nd it:
P = [1 0.2 1 1 1 1]
3rd
P = [1 0.3 1 1 1 1]
and so on until reach 0.9
3nd outer loop
change the 3rd index as the above.. until reach the 6th outer loop

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Akzeptierte Antwort

Voss
Voss am 23 Jul. 2023
Ran in:
format shortg
P = [1 1 1 1 1 1];
P_orig = P;
for ii = 1:numel(P)
fprintf('outer loop iteration %d\n',ii);
P = P_orig;
for jj = 1:9
fprintf('inner loop iteration %d\n',jj);
P(ii) = jj/10;
disp(P)
end
end
outer loop iteration 1
inner loop iteration 1
0.1 1 1 1 1 1
inner loop iteration 2
0.2 1 1 1 1 1
inner loop iteration 3
0.3 1 1 1 1 1
inner loop iteration 4
0.4 1 1 1 1 1
inner loop iteration 5
0.5 1 1 1 1 1
inner loop iteration 6
0.6 1 1 1 1 1
inner loop iteration 7
0.7 1 1 1 1 1
inner loop iteration 8
0.8 1 1 1 1 1
inner loop iteration 9
0.9 1 1 1 1 1
outer loop iteration 2
inner loop iteration 1
1 0.1 1 1 1 1
inner loop iteration 2
1 0.2 1 1 1 1
inner loop iteration 3
1 0.3 1 1 1 1
inner loop iteration 4
1 0.4 1 1 1 1
inner loop iteration 5
1 0.5 1 1 1 1
inner loop iteration 6
1 0.6 1 1 1 1
inner loop iteration 7
1 0.7 1 1 1 1
inner loop iteration 8
1 0.8 1 1 1 1
inner loop iteration 9
1 0.9 1 1 1 1
outer loop iteration 3
inner loop iteration 1
1 1 0.1 1 1 1
inner loop iteration 2
1 1 0.2 1 1 1
inner loop iteration 3
1 1 0.3 1 1 1
inner loop iteration 4
1 1 0.4 1 1 1
inner loop iteration 5
1 1 0.5 1 1 1
inner loop iteration 6
1 1 0.6 1 1 1
inner loop iteration 7
1 1 0.7 1 1 1
inner loop iteration 8
1 1 0.8 1 1 1
inner loop iteration 9
1 1 0.9 1 1 1
outer loop iteration 4
inner loop iteration 1
1 1 1 0.1 1 1
inner loop iteration 2
1 1 1 0.2 1 1
inner loop iteration 3
1 1 1 0.3 1 1
inner loop iteration 4
1 1 1 0.4 1 1
inner loop iteration 5
1 1 1 0.5 1 1
inner loop iteration 6
1 1 1 0.6 1 1
inner loop iteration 7
1 1 1 0.7 1 1
inner loop iteration 8
1 1 1 0.8 1 1
inner loop iteration 9
1 1 1 0.9 1 1
outer loop iteration 5
inner loop iteration 1
1 1 1 1 0.1 1
inner loop iteration 2
1 1 1 1 0.2 1
inner loop iteration 3
1 1 1 1 0.3 1
inner loop iteration 4
1 1 1 1 0.4 1
inner loop iteration 5
1 1 1 1 0.5 1
inner loop iteration 6
1 1 1 1 0.6 1
inner loop iteration 7
1 1 1 1 0.7 1
inner loop iteration 8
1 1 1 1 0.8 1
inner loop iteration 9
1 1 1 1 0.9 1
outer loop iteration 6
inner loop iteration 1
1 1 1 1 1 0.1
inner loop iteration 2
1 1 1 1 1 0.2
inner loop iteration 3
1 1 1 1 1 0.3
inner loop iteration 4
1 1 1 1 1 0.4
inner loop iteration 5
1 1 1 1 1 0.5
inner loop iteration 6
1 1 1 1 1 0.6
inner loop iteration 7
1 1 1 1 1 0.7
inner loop iteration 8
1 1 1 1 1 0.8
inner loop iteration 9
1 1 1 1 1 0.9

Weitere Antworten (1)

Davide Masiello
Davide Masiello am 23 Jul. 2023
Verschoben: Star Strider am 23 Jul. 2023
Ran in:
Must you do this with a nested loop?
Example
P0 = [(0.1:0.1:0.9)',ones(9,5)];
P1 = P0;
for i = 1:5
P1 = [P1;circshift(P0,i,2)];
end
disp(P1)
0.1000 1.0000 1.0000 1.0000 1.0000 1.0000 0.2000 1.0000 1.0000 1.0000 1.0000 1.0000 0.3000 1.0000 1.0000 1.0000 1.0000 1.0000 0.4000 1.0000 1.0000 1.0000 1.0000 1.0000 0.5000 1.0000 1.0000 1.0000 1.0000 1.0000 0.6000 1.0000 1.0000 1.0000 1.0000 1.0000 0.7000 1.0000 1.0000 1.0000 1.0000 1.0000 0.8000 1.0000 1.0000 1.0000 1.0000 1.0000 0.9000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 0.1000 1.0000 1.0000 1.0000 1.0000 1.0000 0.2000 1.0000 1.0000 1.0000 1.0000 1.0000 0.3000 1.0000 1.0000 1.0000 1.0000 1.0000 0.4000 1.0000 1.0000 1.0000 1.0000 1.0000 0.5000 1.0000 1.0000 1.0000 1.0000 1.0000 0.6000 1.0000 1.0000 1.0000 1.0000 1.0000 0.7000 1.0000 1.0000 1.0000 1.0000 1.0000 0.8000 1.0000 1.0000 1.0000 1.0000 1.0000 0.9000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 0.1000 1.0000 1.0000 1.0000 1.0000 1.0000 0.2000 1.0000 1.0000 1.0000 1.0000 1.0000 0.3000 1.0000 1.0000 1.0000 1.0000 1.0000 0.4000 1.0000 1.0000 1.0000 1.0000 1.0000 0.5000 1.0000 1.0000 1.0000 1.0000 1.0000 0.6000 1.0000 1.0000 1.0000 1.0000 1.0000 0.7000 1.0000 1.0000 1.0000 1.0000 1.0000 0.8000 1.0000 1.0000 1.0000 1.0000 1.0000 0.9000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 0.1000 1.0000 1.0000 1.0000 1.0000 1.0000 0.2000 1.0000 1.0000 1.0000 1.0000 1.0000 0.3000 1.0000 1.0000 1.0000 1.0000 1.0000 0.4000 1.0000 1.0000 1.0000 1.0000 1.0000 0.5000 1.0000 1.0000 1.0000 1.0000 1.0000 0.6000 1.0000 1.0000 1.0000 1.0000 1.0000 0.7000 1.0000 1.0000 1.0000 1.0000 1.0000 0.8000 1.0000 1.0000 1.0000 1.0000 1.0000 0.9000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 0.1000 1.0000 1.0000 1.0000 1.0000 1.0000 0.2000 1.0000 1.0000 1.0000 1.0000 1.0000 0.3000 1.0000 1.0000 1.0000 1.0000 1.0000 0.4000 1.0000 1.0000 1.0000 1.0000 1.0000 0.5000 1.0000 1.0000 1.0000 1.0000 1.0000 0.6000 1.0000 1.0000 1.0000 1.0000 1.0000 0.7000 1.0000 1.0000 1.0000 1.0000 1.0000 0.8000 1.0000 1.0000 1.0000 1.0000 1.0000 0.9000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 0.1000 1.0000 1.0000 1.0000 1.0000 1.0000 0.2000 1.0000 1.0000 1.0000 1.0000 1.0000 0.3000 1.0000 1.0000 1.0000 1.0000 1.0000 0.4000 1.0000 1.0000 1.0000 1.0000 1.0000 0.5000 1.0000 1.0000 1.0000 1.0000 1.0000 0.6000 1.0000 1.0000 1.0000 1.0000 1.0000 0.7000 1.0000 1.0000 1.0000 1.0000 1.0000 0.8000 1.0000 1.0000 1.0000 1.0000 1.0000 0.9000
After you produced P1, at each iteration of your code you can just call the next row of the array P1

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