MATLAB: Could anyone help me how to select four maximum values of each row in a matrix size(10,8)

max

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.

Best Answer

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
>>
Related Question