MATLAB中矩阵的傅里叶变换

Question

我在'z'中得到了一个矩阵，我想对该矩阵进行傅里叶变换，但在答案中它给出了一个像'z'一样的矩阵。为什么我的数据傅里叶变换错误？

%formula I(Q, t) = A exp[(-t/tau_beta)^beta]
% beta
clear;
beta = [0.4 0.6 0.8 1];

tau_beta = [1 10 100 1000];

t = [0:1:1e4];

% Division of (t/tbeta)

for m = 1:1:4
    y(m, :) = t/tau_beta(m);
end
A = 1;

for k = 1:4
    for j = 1:1:10001
        for i = 1:1:4
            %z(i, :) = y(j, :).^beta(i)

            z(i+(k-1)*(4), j) = A*exp(-y(i, j).^beta(k));

            zet(i+(k-1)*(4), j) = y(i, j).^beta(k);

            %I_temp(i, :) = z(i, :);

            %I(i, j, :) = I_temp(i, :);
            % Fourier Transform

            FT(i+(k-1)*(4), j) = abs(fft(z(i+(k-1)*(4), j)));
        end
    end
end