how we find a particular number from the matrix in matlab????
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A=[2 3 4;5 4 6;7 8 4] suppose we want to select '4' of 1st row of 3rd column,2nd row of 2nd column and 3rd row of 3rd column.how did we find this number?????
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Accepted Answer
Stephen23
on 4 Oct 2015
Edited: Stephen23
on 4 Oct 2015
It is not clear what numbers you want: when you write that you want "this number", are you referring to the indices of the fours in that matrix, or the fours themselves, or perhaps some other numbers? If you don't tell us exactly what you want, or what you need to do with these numbers, then it is difficult for us to provide you with a clear answer.
It seems that you want the indices of the fours, in which case here are some possible ways to get indices of values in a matrix:
>> A=[2 3 4;5 4 6;7 8 4] % data matrix
A =
2 3 4
5 4 6
7 8 4
>> [R,C] = find(A==4) % row and column indices
R =
2
1
3
C =
2
3
3
>> L = find(A==4) % linear indices
L =
5
7
9
>> X = A==4 % logical indices
X =
0 0 1
0 1 0
0 0 1
And of course you can use any of these to extract those value from the matrix:
>> A(X)
ans =
4
4
4
You can read more about indexing in the documentation:
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