Matrix A to B

I have Matrix called A and I want to check the value of this Matrix. if the value is between 1 to 100 I want insert the cordinate of the value to Matrix B.

example: 
A:
0 -1 5 12 6
0 -1 123 1 3

B:
1 1 1 2 2
3 4 5 4 5

How can I do this?

Answer 1

[dpb]

>> [i j]=ind2sub(size(A),find(iswithin(A,1,100)));
>> [i j]
ans =
   1     3
   1     4
   2     4
   1     5
   2     5
>>

iswithin is my utility helper function...

function flg=iswithin(x,lo,hi)
% returns T for values within range of input
% SYNTAX:
%  [log] = iswithin(x,lo,hi)
%      returns T for x between lo and hi values, inclusive

% dpbozarth

    flg= (x>=lo) & (x<=hi);