MATLAB: Matrix sorting re-size problem

matrixmatrix arraymatrix manipulationsorting

Hi everyone, Lets say i have a matrix a=[1 2 3; 1 0 3; 2 3 5; 1 0 5] like that i have 1000 rows. Now i want to remove the rows whose second column element is 0. i.e. if(a(i,2)==0) then remove it. Pls help me out of this. Thanks

Best Answer

a(a(:,2) ==0,:) = []

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MATLAB: How to eliminate column of the matrix

A(:,all(A==0)) = []

MATLAB: Re-sizing vectors

If you want to change the range of the y-values, you can do it by first normalizing and then denormalizing to your required range

x = [1xn signal]
xNormalized = (x-min(x))/(max(x)-min(x))
newMin = 0;
newMax = 90;  % new minimum and maximum value of the signal you want
xNew = xNormalized*(newMax - newMin) + newMin;

xNew will have same shape of x but varies from newMin to newMax.

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MATLAB: How to eliminate column of the matrix

MATLAB: Re-sizing vectors

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