Comments on: in matlab, find the array position of an entry closest to some arbitrary value

By: Paris

Paris — Sat, 21 Jan 2012 00:00:35 +0000

What if I need the closest entry of the array but within limits?

Example to clarify:

I have the array test=[5,6,7,8,9,10] and I want the index of the entry closest to 5 out of the entries that are >=6 (therefore the index of 6 -> 2).

[~,idx]=min(abs(5-test)) returns 1 of course…

At first I though about trying something like

[~,idx]=min(abs(5-test(test>=6)))

but it won’t do since 6 has idx=1 within the test(test>=6) array and therefore the ans is still idx=1.

Any ideas?

By: Brian

Brian — Fri, 09 Dec 2011 01:16:14 +0000

Edit to above; I forgot to type “function”

function [i,j,k] = closest_match(M,a)

By: Brian

Brian — Fri, 09 Dec 2011 01:14:43 +0000

For multidimensional matrices:

[i,j,k] = closest_match(M,a)
% Find the indices of the value closest to a in matrix M
[~, linear_index] = min(abs(T(:)-val)));
[i,j,k] = ind2sub(size(T),linear_index)

By: Michele

Michele — Wed, 30 Nov 2011 16:03:11 +0000

Hi!
I need to find a value in different Array(n,m).
I try to use something like this:
[n,m]=find(A47==9941005309)
and this works well, so i need a loop that for i=1:47 searchs 9941005309 in A1, A2, Ai…
I tried like this:

[n,m]=find(R,num2str(l)==9941005309)

where R=’A’ but it doesn’t work, where I’m wrong?
Thanks for help me!

By: basu

basu — Sat, 03 Sep 2011 16:45:03 +0000

how to find proximity matrix of binary data?

and how to find angle for bounding boxes of binary image using PCA

By: Kostas

Kostas — Wed, 10 Aug 2011 21:32:10 +0000

Worked brilliant, thanks!

By: Kelz

Kelz — Mon, 25 Jul 2011 23:45:52 +0000

Hi, I have a very large matrix, i have the matrix index (x,y,z) but im intrested in the actual value of this index in the original array. How do I go about this? Kelz

By: Kelz

Kelz — Mon, 25 Jul 2011 23:44:58 +0000

Hi, I have a very large matrix, i have the matrix index (x,y,z) but im intrested in the actual value of this index in the original array. How do I go about this?

By: Rabindra Rimal

Rabindra Rimal — Thu, 24 Mar 2011 00:37:40 +0000

great8 (°_°)!
thanks a lot!
i had spend more then 10hrs for it.
thank you soo much.
<3 <3

By: Nipun

Nipun — Mon, 14 Mar 2011 17:32:14 +0000

for finding the exact location of any data in the array (both the row and column)
try this
[I,J] = find(T==max(max(T)))
where T is the array.