How to find a series of 'next max' and their indices in an array of numbers?

Hi,

Suppose I have an array of numbers.

I want to find all the numbers, and their indices, which are largest then all previous ones.

For example, for the array:

X = [ 1 2 5 3 4 7 2 3 10 3]

I will get:

Largest: [1 2 5 7 10]

Indices: [1 2 3 6 9]

Sure I can solve it with a 'for' loop.

What will be the fastest way to do it in Matlab?

[Fabio Freschi]

Note that it should be

Largest = [1 2 5 7 10]

[Alon Rozen]

Thanks :)

Corrected.

Answer 1

[Fabio Freschi]

use cummax to find the cumulative maximum, then play with the solution using unique

>> Y = cummax(X)

Y =

     1     2     5     5     5     7     7     7    10    10

>> [largest,index] = unique(Y)

largest =

     1     2     5     7    10


index =

     1
     2
     3
     6
     9

[Alon Rozen]

Great :)

Thanks!