Searching the minimum element of an array

Hi..I have a question: if I have the result of a wavread, an array of samples, and I want to search the minimum element only between the last hundred elements and its index, how I can do this? I have some problems with the indices.

[Micaela]

It's important for me to find also the index of the minimum.

Answer 1

[Azzi Abdelmalek]

v=rand(150,1)
[a0,idx0]=min(v(end-100:end))

 % a0 your min
 % idx0 corresponding index

[Micaela]

ok...thanks!

Answer 2

[Thomas]

Something like this

a=rand(10,1)   % your array
a =
          0.81
          0.91
          0.13
          0.91
          0.63
          0.10
          0.28
          0.55
          0.96
          0.96

 indx = 7;  % index at 7th element
 min_a=min(a(indx:end));  minimum of between index and end
 ans =
          0.28

[Micaela]

Ok...and if I want the index of the minimum, how I can find it?

Answer 3

[HSO]

array=rand(20,1)

[L C] =size(a)

lower=min(a((L-10):end))

[Micaela]

Ok...and if I want the index of the minimum, how I can find it?

[Javier]

Hello Micaela

Step 1 Data

Data=randn(100,1);

Step 2 Find the min in Data

Index = 10; %Search in the last 10 data

x=min(Data((length(Data)-Index):end,:));

Step 3

Description row, column, index of min data

[r,c,v]= find(Data==x);

In this case, r=row vector; c=column vector; v=index value

Hope it helps.

Javier