MATLAB:如何将矩阵的对角线作为另一个矩阵的参数传递? [英] MATLAB: how to pass in the diagonal of a matrix as an argument in another matrix?

问题描述

让c为2D数组，x和y为相同长度的1D数组(例如，让我们有x=1:7和y=3:9).

Let c be 2D array, and x and y be 1D arrays of the same length (for instance, let's have x=1:7 and y=3:9).

我需要找到一种方法，以下面将要描述的方式从x和y传递参数.

I need to find a way to pass in arguments from x and y in the way I will describe below.

如果我只是简单地按c(x,y)，它将给出一个7 x 7的矩阵.我不要那个.
相反，我想传递[x y]矩阵的对角线:((x(1), y(1)), (x(2), y(2))...(x(7), y(7)).没有for循环或任何迭代语句，有没有办法做到这一点?

If I put simply c(x,y) it will give a 7 by 7 matrix. I don't want that.
Instead, I want to pass in the diagonal of the [x y] matrix: ((x(1), y(1)), (x(2), y(2))...(x(7), y(7)). Is there a way to do this without a for loop or any iterative statement?

推荐答案

您在寻找

You are looking for sub2ind function

res = c( sub2ind(size(c), x, y ) )

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