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Can I use a for loop to access different pairs in a matrix?

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darksideofthemoon101
I want to use a matrix as the input of a for loop, and reference different pairs of indices in the matrix as the variable for each iteration.
Say I have a matrix that looks like
1 4
2 5
3 6
I want the loop to choose [1 4],[1 5] then [1 6], then go back to the first column and choose [2 4], [2,5] and so on.
Is this possible?

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采纳的回答

Walter Roberson
Walter Roberson 2011-4-4
for idxpair = [1 1 1 2 2 2; 4:6 4:6]
That is, when "for" is given an array it iterates over the columns.
Normally though, you would use
for i1 = 1:2
for i2 = 4:6
...
end
end

更多回答（1 个）

Sean de Wolski
Sean de Wolski 2011-4-4
for ii = 1:3
for jj = 4:6
do_stuff_with(ii,jj);
end
end
What operation are you doing with the two variables. It's possible you could use BSXFUN to do it all with one shot.
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darksideofthemoon101
darksideofthemoon101 2011-4-4
I have a for loop that I feed a number of variables. I'm wanting to look at a broad range of data from the variables, so I was looking for something slightly more elegant than a series of nested loops.
What does BSXFUN do?

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