how to store array

I have

for x=1:5

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

B=[0;2.55]

Y=A\B

end

How can I store 5 different matrices of 2X1 in excel

Answer 1

[Star Strider]

Try something like this —

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.

.

[Ls]

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

[Star Strider]

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.

.