MATLAB: Filter a matrix of data

MATLABmatrix filter

I have a data matrix, 2 columns and N rows. Lets call the columns x and y. I want all rows that meet teh following condition (X<25 and Y>30) to be nulled out of the original matrix and stored in a new matrix.

Best Answer

Just use logical indexing:

N=100;data=randi(100,N,2)/2;%generate random data
L=data(:,1)<25 & data(:,2)>30;
newdata=data(L,:);
data(L,:)=[];

Related Solutions

MATLAB: How to put rows of a matrix in another matrix column

data = rand(243938,1); % generate test data
n = 2; % Columns in Y
Y = nan(100,n); % initiate Y
% method 1, using forloop
for i = 1:n
	Y(1:100,i) = data( (1 + 100*(i-1)):(100*i));
	
end
% method 2, using reshape command
Y1 = reshape(data(1:(n*100)),[100,n]);

Here is 2 methods that scales if you want Y to have more than 2 columns

Alternatively, you can just use: Y = [data(1:100), data(101:200)]

MATLAB: Selecting different criteria for logicals

L=data(:,1)==2 & data(:,2)==3;

Best Answer

Related Solutions

MATLAB: How to put rows of a matrix in another matrix column

MATLAB: Selecting different criteria for logicals

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