清空筛选条件
清空筛选条件

What is M(I) where M is a real matrix and I is a matrix of indices.

1 次查看（过去 30 天）
David Epstein
David Epstein 2018-7-22
回答： Stephen23 2018-7-22
M is a 67x67 matrix of doubles. I is a 441x2 matrix, with I = [xc,yc]. Each row is a pair i,j of indices of M. I want to apply M to I and get a vector of 441 doubles. However, M(xc,yc) gives a matrix of size 441x441 and M([xc,yc]) gives a matrix of size 441x2. I think both results give only zeros. Does anyone know what is happening, as there is no error message? The only thing I can think of is to convert to linear indices. Is that the only way?

请先登录，再回答此问题。

采纳的回答

Stephen23
Stephen23 2018-7-22
"The only thing I can think of is to convert to linear indices. Is that the only way?"
Yes. Use sub2ind.

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Matrices and Arrays 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by