Finding maximum in a matrix

Suppose I have 1000x1 matrix and my data is from (50,60) and then from (160,170) and so on (i.e randomly distributed), What I want is to find maximum out of this 50 to 60 location and then maximum from 160 to 170 location and so on. How to find this ?

[Walter Roberson]

Are those data ranges or are they index locations ?

If they are index locations, are the locations known ahead of time?

[Rohan Mehta]

index locations

[Rohan Mehta]

yes these locations are stored in another matrix

Answer 1

[KALYAN ACHARJYA]

Suppose mat is 1000x1 matrix

%this will give the maximum value within the matrix uptp 50 rows and 60 colm
mat1=mat(1:50,1:60);
max1=max(mat1(:));

You can do the same form other also

mat2=mat(1:160,1:170);
max2=max(mat2(:));

Is this you are looking for?

[Rohan Mehta]

Hi Thanks for help

But what I want is that my data locations are stored in another matrix named K which has 5 variables (Say 50,250,550,750,950) that contain location of my data in matrix A, So I want to find maximum out of the 40 to 60 locations and then from 240,260 and then from 540 to 560 and so on...

[KALYAN ACHARJYA]

to read the index of maximum elements do the following

max1=max(a(:));
[r1,c1]=find(a==max1)

As your comment is confusing, though the question seems easy, thats why I have provided the how to find maimum from a matrix and read the index of maximum elements. Rest you can store the indeces as you want.

[Rohan Mehta]

Hello Sir this piece of code almost solved my problem As I have found all the maximums but one doubt is how to assign the location's of these maximum to another matrix ?

[KALYAN ACHARJYA]

how to assign the location's of these maximum to another matrix?

The second part of comment is not clear for me.

Are you looking for this one?

mat_other(r1,c1)
%..........^ index values from first matrix having maximum value