将所有NaN替换为零而不遍历整个矩阵?
问题描述：
我有一个想法，可以通过遍历每个NaN并使用isnan来替换矩阵中的所有NaN.但是，我怀疑这会使我的代码运行得比应该的慢.有人可以提供更好的建议吗?
I had an idea to replace all the NaNs in my matrix by looping through each one and using isnan. However, I suspect this will make my code run more slowly than it should. Can someone provide a better suggestion?
答
假设您的矩阵是:
A =
NaN 1 6
3 5 NaN
4 NaN 2
您可以找到NaN元素，并使用 isnan 将它们替换为零.像这样:
You can find the NaN elements and replace them with zero using isnan like this :
A(isnan(A)) = 0;
那么您的输出将是:
A =
0 1 6
3 5 0
4 0 2