How to give ranking from highest to lowest

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Mekala balaji
Mekala balaji 2014-12-6
评论： Image Analyst 2024-1-27
Hello, I have number like
Data=[5 6 9 1 5 2]
I want to rank them as: [3 2 1 6 4 5] Can any please help me How can I do this. Thanks in advance.
  1 个评论
amrith sg
amrith sg 2022-3-31
i got a average accuracy 79% at rank 1
from rank 2 to rank 10 , i need to find different average accuracy that should be greater than 79%
please give me the code regarding this problem

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采纳的回答

Roger Stafford
Roger Stafford 2014-12-6
This should give you the rank you are asking for, Mekala:
[~,p] = sort(Data,'descend');
r = 1:length(Data);
r(p) = r;
'r' will be the ranking.
  1 个评论
Image Analyst
Image Analyst 2024-1-27
Ran in:
Data=[5 6 9 1 5 2]
Data = 1×6
5 6 9 1 5 2
% I want to rank them as: [3 2 1 6 4 5]
[~,p] = sort(Data,'descend');
r = 1:length(Data);
r(p) = r
r = 1×6
3 2 1 6 4 5

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更多回答（4 个）

Azzi Abdelmalek
Azzi Abdelmalek 2014-12-6
编辑：Azzi Abdelmalek 2014-12-6
Data=[5 6 9 1 5 2]
[sd,r]=sort(Data,'descend')
sd % sorted data
r % the corresponding indices
  5 个评论
显示 3更早的评论
Azzi Abdelmalek
Azzi Abdelmalek 2014-12-6
We can get the result by sorting the indices resulting from the first sort
Data=[5 6 9 1 5 2]
[~,ii]=sort(Data,'Descend')
[~,r]=sort(ii)

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Sandeep Sai Kiran
编辑：Image Analyst 2024-1-27
Ran in:
Data =[4 8 9 4 7 4]
Data = 1×6
4 8 9 4 7 4
Kal = sort(Data , 'Descend')
Kal = 1×6
9 8 7 4 4 4
Kapil =sort(Kal)
Kapil = 1×6
4 4 4 7 8 9
Zalán Kocsis
Zalán Kocsis 2021-6-2
编辑：Image Analyst 2024-1-27
Ran in:
Here's one that assigns the same rank to same values (ties):
Data=[5 6 9 1 5 2];
[C,~,ic] = unique(Data,'sorted'); % ic are ranks from lowest to highest ; C are unique values
r=(1+max(ic)-ic); % r: rank (highest receives 1; lowest receives length(C); tied values receive same rank)
[Data;r']
ans = 2×6
5 6 9 1 5 2 3 2 1 5 3 4
ASWIN
ASWIN 2024-1-27
编辑：Image Analyst 2024-1-27
Ran in:
A=ones(4);
m=length(A);
r=rank(A)
r = 1
  2 个评论
Dyuman Joshi
Dyuman Joshi 2024-1-27
编辑：Dyuman Joshi 2024-1-27
That rank() is different from what OP is asking about.
Image Analyst
Image Analyst 2024-1-27
By "ranking" he really meant sorting. Your solution does not give the answer of [3 2 1 6 4 5] that he asked for.

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