在 MATLAB 中向量化函数求值 [英] Vectorize function evaluation in MATLAB

问题描述

我有以下功能，

function Vectorize()
a = randn(1,5)
b = randn(1,5)
c = zeros(1,5)
for i=1:5
c(i) = (a(i) - b(i))/(1+a(i)/2+b(i)/3)
end

我想对上述函数求值进行向量化并替换 for 循环.

I want to vectorize the above function evaluation and replace the for loop.

我可以做 c = a -b，找到两个行向量之间的差异.我不知道如何处理除法 a/2 和 b/2.

I could do c = a -b, that finds the difference between two row vectors.I am not sure how to handle the division a/2 and b/2.

有人可以帮忙吗?

推荐答案

您需要元素明智的除法操作 ./

You need the element wise division operation ./

c = (a - b)./(1+a/2+b/3)

如果将向量除以标量，这不是必需的，但是在将数组除以数组的情况下，您必须使用 ./ .有关其他元素，请参阅此处明智的运营商.

If you divide a vector by a scalar, this is not required, but where you divide an array by an array you will have to use ./ in your case. See here for the other element wise operators.

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