ds: r7 octave

ds/25-1/r/7/mlclass-ex2/sigmoid.m

@@ -0,0 +1,16 @@
+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 = 1 ./ (1 + exp(-z));
+
+% =============================================================
+
+end