finding the max values

if i have an array and a number k how can I find the biggest k number in the array . but the number should be according there positing in the array : arr= [ 1 9 4 7 38 8] k= 4 the ans must be = [ 9 7 38 8]

Answer 1

[ANKUR KUMAR]

   arr= [ 1 9 4 7 38 8] 
   k= 4;
   [arr1 b]=sort(arr,'descend');
   b1=b(1:k)
   arr(sort(b1,'ascend'))

[hanan abu elhejaa]

thank you so much :)

Answer 2

[Star Strider]

See if this does what you want:

k = 4;
arr = [ 1 9 4 7 38 8];

Result = arr(arr > k)

Result =
     9     7    38     8

[Walter Roberson]

The question appears to want k to be the number of values to return.

Answer 3

[Walter Roberson]

With R2017b or later use maxk https://www.mathworks.com/help/matlab/ref/maxk.html

To get the elements in vector order use the two output form and ignore the first output and index the original vector at sort() of the second output