0 个投票

Hi all,
I want to index C by M matrixs as below but I have problem in convert row index into linear index code, I am Using MATLAB R2013a, can any one help me,Thank you in advance
close all
clear all
clc
F=random('exp',1,3,3,4);
C=F*100
M=bsxfun(@times, C./cumsum(C,3) , reshape(1:4,1,1,[]) )
[vec,idx] = max(M,[],1); % value and row index of max in each column.
S = size(M); % size of input array.
idx = idx + S(1)*(0:S(2)-1); % convert row index into linear index !!!!!!!!!
C(idx) % use linear index to get elements of C.
This are the error message
Error using +
Matrix dimensions must agree.
Error in Untitled6 (line 10)
idx = idx + S(1)*(0:S(2)-1); % convert row index into linear index.

请先登录，再回答此问题。

 采纳的回答

Walter Roberson
Walter Roberson 2019-2-12

0 个投票

Your M is 4 dimensional . The idx output of max along the first dimension is going to be 4 dimensional . You are trying to add a row vector to it.

3 个评论
显示 1更早的评论 隐藏 1更早的评论

Ashraf Sherif
Ashraf Sherif 2019-2-12
Thank you Walter Roberson but I couldn't do it.
Walter Roberson
Walter Roberson 2019-2-14
baseidx = idx + repmat((0:size(M,2)-1) * size(M,1),1,1,size(idx,3)) + repmat(reshape((0:size(M,3)-1) * size(M,1)*size(M,2),1,1,[]),1,size(idx,2),1);
rowidx = baseidx + repmat(reshape((0:size(M,1)-1),[],1),1,size(M,2),size(M,3));
Ashraf Sherif
Ashraf Sherif 2019-2-15
Thank you a lot Walter Roberson

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 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