This should be the sigmoid function

[zakir8251]

Machine-Learning/Andrew Ng Stanford Coursera/Week 04/ex3/predictOneVsAll.m

Line 35 in 348fa77

h_theta = (X * all_theta');

Hey shouldn't this be the sigmoid fn ... logistic regression vs linear?
[~,p]=max(sigmoid(X*all_theta'),[],2);

[swapnil0070]

g=1./(1+exp(-z))
sigmoid.zip

[SenthilVikram]

In nnCostFunction.m
It's showing an error when I write

y_matrix = eye(num_labels)(y,:);

But not showing an error when I rewrite -

I = eye(num_labels);
y_matrix = I(y,:);

[Vasukapoor07]

It is easy to understand.
m = length(y)
g = ones(m,1) ./ ((ones(m,1) + exp(-z))