MATLAB: How to select a range of data in matrix

range of data in matrix

I have a column matrix (10608×1) with a minimum value of 38.8 and maximum value of 192.8. I want to retain the matrix with the range of minimum values to a certain number say 44.1. Please I need a help to achieve this. Thanks

Best Answer

Let A be your column matrix.

idx = A <= 44.1 ;  % get indices using logical indexing 
iwant = A(idx) ; % Extract those elements

Read about logical indexing of arrays in MATLAB.

Related Solutions

MATLAB: Finding index of min value in a matrix

So, you know what elements of the matrix you want to check?

If that is so, then let's say the row and column of those three elements are defined as:

rowIdx=[r1,r2,r3];
colIdx=[c1,c2,c3];
mat3Elements=myMatrix(sub2ind(size(myMatrix),rowIdx,colIdx);
[minValue,minIdx]=min(mat3Elements);
disp(['Min values is: ' num2str(minValue)])
disp('column: ')
disp(colIdx(minIdx))

if you want the min value of the entire matrix that is easier

[minValue,minIdx]=min(myMatrix(:));
disp(['Min values is: ' num2str(minValue)])
disp('column: ')
[~,col]=ind2sub(size(myMatrix),minIdx);
disp(col)

MATLAB: Create a subset of data matrix randomly

A = rand(116,17) ;  % your data 
N = 896 ;
iwant = NaN(size(A)) ;
idx = randperm(numel(A),N) ;
iwant(idx) = A(idx) ;

Best Answer

Related Solutions

MATLAB: Finding index of min value in a matrix

MATLAB: Create a subset of data matrix randomly

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