How do I get the position of the highest numbers of a vector?

Question

gsourop 2017-4-9

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/334473-how-do-i-get-the-position-of-the-highest-numbers-of-a-vector

评论： gsourop 2017-4-9

采纳的回答： dpb

在 MATLAB Online 中打开

Hi everyone,

Does anyone know how to get the position of 4 highest numbers of a vector? For example,

rng(1)
a = randn(10,1)
a =
   -0.6490
    1.1812
   -0.7585
   -1.1096
   -0.8456
   -0.5727
   -0.5587
    0.1784
   -0.1969
    0.5864

Clearly the four highest numbers are 1.1812 , 0.5864 , 0.1784 and -0.1969. That correspond to element 2,10,8 and 9, respectively. How can I get this sequence in a vector form, ie 4x1?

Thanks a lot.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

dpb 2017-4-9

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/334473-how-do-i-get-the-position-of-the-highest-numbers-of-a-vector#answer_262360

在 MATLAB Online 中打开

>> [mx,ix]=sort(a,'descend');
>> N=4;
>> num2str([ix(1:N) mx(1:N) ],'Posn %2d Value %7.4f')
ans =
Posn  2 Value  1.1812
Posn 10 Value  0.5864
Posn  8 Value  0.1784
Posn  9 Value -0.1969
>>