MATLAB: How to delete rows from matrix in matlab

Hello there, I have a linear programming problem as you Know with two matrices left hand side and right hand side. I want to delete the rows from two matrices which are associated with the value zero (0) in the right hand side. Regards, Ghazwan

Best Answer

Let's say you want to delete the r-th row from matrix A. This should work:

A=A([1:r-1 r+1:end],:)

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MATLAB: How to generate a spiral matrix which starts from first element

You will have to write your own code for this.

A = zeros(3,6);%You can change this mxn to whatever dims you like, be it square(m=n) or rectangular matrix.
[m,n] = size(A);
%m = no of rows
%n = no of columns
%A = matrix to be filled with spiral values
 %This code works fine. I commented an eg also below
top = 1;
bottom = m;
left = 1;
right = n; %To keep track of the four directions
value = 1;%Let us strat from 1
while true
    %Top Row First
    if left>right
        break;
    end
    for i = left:right
        A(top,i) = value;
        value = value + 1;
    end
    top = top + 1;
    %Then The RightMost Column
    if top>bottom
        break;
    end
    for i = top:bottom
        A(i,right) = value;
        value = value + 1;
    end
    right = right - 1;
    %Then Bottom Row
    if left>right
        break;
    end
    for i = right:-1:left
        A(bottom,i) = value;
        value = value + 1;
    end
    bottom = bottom - 1;
    %Then The Left Column
    if top>bottom
        break;
    end
    for i = bottom:-1:top
        A(i,left) = value;
        value = value + 1;
    end
    left = left + 1;
end
A

MATLAB: How to delete a row from a Financial Time Series

tsobjkt = tsobjkt([1 3:end]); % Just overwrite it with second obs removed

http://www.mathworks.com/help/finance/using-ftstool-for-supported-tasks.html

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MATLAB: How to generate a spiral matrix which starts from first element

MATLAB: How to delete a row from a Financial Time Series

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