Hi, can you help me fix my code? How can I convert this to a matrix using if/while/for statements?

Question

Fortia Alfeche 2023-7-3

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https://ww2.mathworks.cn/matlabcentral/answers/1991223-hi-can-you-help-me-fix-my-code-how-can-i-convert-this-to-a-matrix-using-if-while-for-statements

编辑： dpb 2023-7-3

format long G
MERfgh = [];
i = 1;
%for i=1:11
MERfgh(i,1) = MERfff(i,1);
for j=1:11
    MERfgh(i,2) = MERfff(j,1);
    i = i+1;
end
%end
MERfgh

I WANT IT TO LOOK LIKE THIS:

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Answer 1

DGM 2023-7-3

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Consider the example:

% some data in a column vector
MERfff = (21:31).';
% rearrange it
[xx yy] = meshgrid(MERfff);
MERfgh = [xx(:) yy(:)]
MERfgh = 121×2
    21    21
    21    22
    21    23
    21    24
    21    25
    21    26
    21    27
    21    28
    21    29
    21    30

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James Tursa 2023-7-3

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Also consider this example using element-wise raise-to-power:

10.^(-1:1)
ans = 1×3
    0.1000    1.0000   10.0000

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Answer 2

dpb 2023-7-3

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编辑：dpb 2023-7-3

在 MATLAB Online 中打开

Use the power of MATLAB; it is, after all, MATrixLABoratory...

format short e; format compact
P=2;        % power range -- use small number for demo so can see output...
x=10.^[-P:P].';
M=[kron(x,ones(size(x))) repmat(x,size(x))]
M = 25×2
   1.0000e-02   1.0000e-02
   1.0000e-02   1.0000e-01
   1.0000e-02   1.0000e+00
   1.0000e-02   1.0000e+01
   1.0000e-02   1.0000e+02
   1.0000e-01   1.0000e-02
   1.0000e-01   1.0000e-01
   1.0000e-01   1.0000e+00
   1.0000e-01   1.0000e+01
   1.0000e-01   1.0000e+02