Cursera: machine learning ex2.

machine_learning/mlclass-ex2-008/mlclass-ex2/sigmoid.m

@@ -0,0 +1,19 @@
+function g = sigmoid(z)
+%SIGMOID Compute sigmoid functoon
+%   J = SIGMOID(z) computes the sigmoid of z.
+
+% You need to return the following variables correctly 
+g = zeros(size(z));
+
+% ====================== YOUR CODE HERE ======================
+% Instructions: Compute the sigmoid of each value of z (z can be a matrix,
+%               vector or scalar).
+
+
+g = ones(size(z)) ./ (ones(size(z)) + exp(-1*z));
+
+
+
+% =============================================================
+
+end