how to store array

xv=1:5;
for k = 1:numel(xv)
    x = xv(k);
    A=[5*x 0;2*x^2 1];
    B=[0;2.55];
    Y(:,x)=A\B;
end
Y 
Y = 2×5
         0         0         0         0         0
    2.5500    2.5500    2.5500    2.5500    2.5500
writematrix(Y,'YourFileName.xlsx')

Experiment to get the result you want.

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Ls 2021-9-11

It does not work when xv =0:0.1:3!! What should we change in case of that???

Star Strider 2021-9-11

在 MATLAB Online 中打开

After I created ‘xv’ I forgot to update the subscript in ‘Y’ (corrected here). My apologies.

xv=0:0.1:3;

for k = 1:numel(xv)

x = xv(k);

A=[5*x 0;2*x^2 1];

B=[0;2.55];

Y(:,k)=A\B;

end

Warning: Matrix is singular to working precision.

Y

Y = 2×31

NaN 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 NaN 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500 2.5500

figure

plot(xv, Y, '.-')

grid

Beyond that, it works, however with any element of ‘xv’ being 0, there is going to be a NaN result, because the‘Y’ calculation results in a 0/0 operation, that result (or in a few similar situations) will be NaN.

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