# Searching the minimum element of an array

1 view (last 30 days)
Micaela on 18 Sep 2012
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 on 18 Sep 2012
It's important for me to find also the index of the minimum.

Azzi Abdelmalek on 18 Sep 2012
Edited: Azzi Abdelmalek on 18 Sep 2012
v=rand(150,1)
[a0,idx0]=min(v(end-100:end))
% idx0 corresponding index
Micaela on 18 Sep 2012
ok...thanks!

Thomas on 18 Sep 2012
Edited: Thomas on 18 Sep 2012
Something like this
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 on 18 Sep 2012
Ok...and if I want the index of the minimum, how I can find it?

HSO on 18 Sep 2012
array=rand(20,1)
[L C] =size(a)
lower=min(a((L-10):end))
##### 2 CommentsShowHide 1 older comment
Javier on 18 Sep 2012
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