problem indexing a matrix from arrays

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Tristan
Tristan 2013-10-31
回答： Azzi Abdelmalek 2013-10-31
I want matlab to return all the elements of p2 at rows r columns c, I tried p2(r,c), but that doesn't give me the right answer.
p2 =
0.1500 0.1500
0.4804 0.4804
0.5098 0.5098
0.0498 0.0498
1.1008 1.1008
1.0920 1.0920
2.0219 2.0219
1.1342 1.1342
2.9643 2.9643
3.8808 3.8808
3.8487 3.8487
4.9765 4.9765
8.3789 8.3789
7.7730 7.7730
r =
3
6
7
9
10
12
3
6
7
9
10
12
c =
1
1
1
1
1
1
2
2
2
2
2
2
>> p2(r,c)
ans =
Columns 1 through 5
0.5098 0.5098 0.5098 0.5098 0.5098
1.0920 1.0920 1.0920 1.0920 1.0920
2.0219 2.0219 2.0219 2.0219 2.0219
2.9643 2.9643 2.9643 2.9643 2.9643
3.8808 3.8808 3.8808 3.8808 3.8808
4.9765 4.9765 4.9765 4.9765 4.9765
0.5098 0.5098 0.5098 0.5098 0.5098
1.0920 1.0920 1.0920 1.0920 1.0920
2.0219 2.0219 2.0219 2.0219 2.0219
2.9643 2.9643 2.9643 2.9643 2.9643
3.8808 3.8808 3.8808 3.8808 3.8808
4.9765 4.9765 4.9765 4.9765 4.9765
Columns 6 through 10
0.5098 0.5098 0.5098 0.5098 0.5098
1.0920 1.0920 1.0920 1.0920 1.0920
2.0219 2.0219 2.0219 2.0219 2.0219
2.9643 2.9643 2.9643 2.9643 2.9643
3.8808 3.8808 3.8808 3.8808 3.8808
4.9765 4.9765 4.9765 4.9765 4.9765
0.5098 0.5098 0.5098 0.5098 0.5098
1.0920 1.0920 1.0920 1.0920 1.0920
2.0219 2.0219 2.0219 2.0219 2.0219
2.9643 2.9643 2.9643 2.9643 2.9643
3.8808 3.8808 3.8808 3.8808 3.8808
4.9765 4.9765 4.9765 4.9765 4.9765
Columns 11 through 12
0.5098 0.5098
1.0920 1.0920
2.0219 2.0219
2.9643 2.9643
3.8808 3.8808
4.9765 4.9765
0.5098 0.5098
1.0920 1.0920
2.0219 2.0219
2.9643 2.9643
3.8808 3.8808
4.9765 4.9765
I should be getting this:
0.5098
1.092
2.0219
2.9643
3.8808
4.9765
0.5098
1.092
2.0219
2.9643
3.8808
4.9765

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2013-10-31
p2(sub2ind(size(p2),r,c))

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