How do I implement the sigmoid function in Octave?

so given that the sigmoid function is defined as hθ(x) = g(θ^(T)x), how can I implement this funcion in Octave given that g = zeros(size(z)) ?

Topic regression logistic-regression octave

Category Data Science

1
answered at

This will compute the sigmoid of a scalar, vector or matrix.

function g = sigmoid(z)
%   SIGMOID Compute sigmoid function
%   g = SIGMOID(z) computes the sigmoid of z.


% Compute the sigmoid of each value of z (z can be a matrix,
% vector or scalar).

SIGMOID = @(z) 1./(1 + exp(-z));

g = SIGMOID(z);

end

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