could anyone help me how to select four maximum values of each row in a matrix size(10,8)
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jaah navi
el 29 de Mayo de 2019
Comentada: Walter Roberson
el 29 de Mayo de 2019
I am having a matrix of size(10,8) (% 10 rows and 8 columns)
I want to select 4 maximum values from each row by having the result of matrix size(4,8)(%4 rows and 8 columns)
Could anyone please help me on this.
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Walter Roberson
el 29 de Mayo de 2019
This question does not describe what to do in the case of ties.
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KALYAN ACHARJYA
el 29 de Mayo de 2019
Editada: KALYAN ACHARJYA
el 29 de Mayo de 2019
You can do it in multiple ways, let’s consider, the mat1 is matrix having size 10x8
sort_mat=sort(mat1);
result=sort_mat(7:end,:);
Another way as per @madhan ravi comment
sort_mat=sort(mat1,'descend');
result=sort_mat(1:4,:)
See example
>> mat1=rand(10,8)
mat1 =
0.2599 0.5499 0.1839 0.3692 0.5752 0.6477 0.7802 0.8176
0.8001 0.1450 0.2400 0.1112 0.0598 0.4509 0.0811 0.7948
0.4314 0.8530 0.4173 0.7803 0.2348 0.5470 0.9294 0.6443
0.9106 0.6221 0.0497 0.3897 0.3532 0.2963 0.7757 0.3786
0.1818 0.3510 0.9027 0.2417 0.8212 0.7447 0.4868 0.8116
0.2638 0.5132 0.9448 0.4039 0.0154 0.1890 0.4359 0.5328
0.1455 0.4018 0.4909 0.0965 0.0430 0.6868 0.4468 0.3507
0.1361 0.0760 0.4893 0.1320 0.1690 0.1835 0.3063 0.9390
0.8693 0.2399 0.3377 0.9421 0.6491 0.3685 0.5085 0.8759
0.5797 0.1233 0.9001 0.9561 0.7317 0.6256 0.5108 0.5502
>> sort_mat=sort(mat1)
sort_mat =
0.1361 0.0760 0.0497 0.0965 0.0154 0.1835 0.0811 0.3507
0.1455 0.1233 0.1839 0.1112 0.0430 0.1890 0.3063 0.3786
0.1818 0.1450 0.2400 0.1320 0.0598 0.2963 0.4359 0.5328
0.2599 0.2399 0.3377 0.2417 0.1690 0.3685 0.4468 0.5502
0.2638 0.3510 0.4173 0.3692 0.2348 0.4509 0.4868 0.6443
0.4314 0.4018 0.4893 0.3897 0.3532 0.5470 0.5085 0.7948
0.5797 0.5132 0.4909 0.4039 0.5752 0.6256 0.5108 0.8116
0.8001 0.5499 0.9001 0.7803 0.6491 0.6477 0.7757 0.8176
0.8693 0.6221 0.9027 0.9421 0.7317 0.6868 0.7802 0.8759
0.9106 0.8530 0.9448 0.9561 0.8212 0.7447 0.9294 0.9390
>> resul1=sort_mat(7:10,:)
resul1 =
0.5797 0.5132 0.4909 0.4039 0.5752 0.6256 0.5108 0.8116
0.8001 0.5499 0.9001 0.7803 0.6491 0.6477 0.7757 0.8176
0.8693 0.6221 0.9027 0.9421 0.7317 0.6868 0.7802 0.8759
0.9106 0.8530 0.9448 0.9561 0.8212 0.7447 0.9294 0.9390
>>
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