MATLAB: I am trying to find the index for the maximum y. someone help?

Question

I have the following

y = 
 Columns 1 through 9
    0.0101    0.0105    0.0101    0.0096    0.0257    0.0105    0.0103    0.0097    0.0097
  Column 10
    0.0103

and

index =
  Columns 1 through 7
       14148       14369       14580       14772        6257       14970       15281
  Columns 8 through 10
       15414       15058       15806

I know is 6257 but whats the code. I tried but keep getting 166252??I don't know why?

Answer 1

[max_y,idx_to_max_y] = max(y);
indexAtMax = index(idx_to_max_y);