problem with an if statement
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
Dear all,
I have A =[
1 2 0 2 11 0;
2 3 0 30 11 -2;
3 4 0 28 12 -6;
4 5 0 25 1 -9;
5 6 0 22 2 -6;
6 7 0 22 3 -12;
7 8 0 19 4 -13;
8 9 0 17 5 -17;
9 10 0 14 6 -18;
10 11 0 12 7 -22;
11 12 0 9 8 -25;
12 13 0 6 9 -26;
13 14 0 4 10 -30;
14 15 0 1 11 -1;
15 16 0 29 11 -3;
16 17 0 27 12 0;
17 18 0 31 1 -3;
18 19 0 28 2 0;
19 20 0 28 3 -6;
20 21 0 25 4 -7;
21 22 0 23 5 -11;
22 23 0 20 6 -12;
23 24 0 18 7 -16;
24 25 0 15 8 -19;
25 26 0 12 9 -20;
26 27 0 10 10 -24;
27 28 0 7 11 -25;
28 29 0 5 12 -29;
29 30 0 2 1 -1;
30 31 0 30 1 -4;
31 32 0 27 2 -1;
32 33 0 27 3 -7;
33 34 0 24 4 -8;
34 35 0 22 5 -12;
35 36 0 19 6 -13;
36 37 0 17 7 -17;
37 38 0 14 8 -20;
38 39 0 11 9 -21;
39 39 0 9 10 -2]
I want to apply the following if statement: if the fourth column is 1 or 2 AND the fifth column contains identical successive numbers AND the element in the laste column in not zero then replace every other corresponding element in the third column with the corresponding element (in absolute value) from the last column
The if statement should select the following elements
B=[
14 15 0 1 11 -1;
15 16 0 29 11 -3;
29 30 0 2 1 -1;
30 31 0 30 1 -4;]
and then the action is to obtain
B=[
14 15 1 1 11 -1;
15 16 0 29 11 -3;
29 30 1 2 1 -1;
30 31 0 30 1 -4;]
So the new A should be
Anew =[
1 2 0 2 11 0;
2 3 0 30 11 -2;
3 4 0 28 12 -6;
4 5 0 25 1 -9;
5 6 0 22 2 -6;
6 7 0 22 3 -12;
7 8 0 19 4 -13;
8 9 0 17 5 -17;
9 10 0 14 6 -18;
10 11 0 12 7 -22;
11 12 0 9 8 -25;
12 13 0 6 9 -26;
13 14 0 4 10 -30;
14 15 1 1 11 -1;
15 16 0 29 11 -3;
16 17 0 27 12 0;
17 18 0 31 1 -3;
18 19 0 28 2 0;
19 20 0 28 3 -6;
20 21 0 25 4 -7;
21 22 0 23 5 -11;
22 23 0 20 6 -12;
23 24 0 18 7 -16;
24 25 0 15 8 -19;
25 26 0 12 9 -20;
26 27 0 10 10 -24;
27 28 0 7 11 -25;
28 29 0 5 12 -29;
29 30 1 2 1 -1;
30 31 0 30 1 -4;
31 32 0 27 2 -1;
32 33 0 27 3 -7;
33 34 0 24 4 -8;
34 35 0 22 5 -12;
35 36 0 19 6 -13;
36 37 0 17 7 -17;
37 38 0 14 8 -20;
38 39 0 11 9 -21;
39 39 0 9 10 -2]
Is there a clever coding for this?
1 Commento
Conrad
il 1 Ago 2012
If you look at your B matrix
B=[
14 15 0 1 11 -1;
15 16 0 29 11 -3;
29 30 0 2 1 -1;
30 31 0 30 1 -4;]
the rows
[15 16 0 29 11 -3]
and
[30 31 0 30 1 -4]
do not have a 1 or 2 in the fourth column, so how where they selected? According to the logic given, it does not make sense.
Risposta accettata
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Logical in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!