how to convert logits to probability in binary classification in tensorflow?

Question

logits= tf.matmul(inputs, weight) + bias

After matmul operation, the logits are two values derive from the MLP layer. My target is binary classification, how to convert the two values, logits, into probabilities, which include positive prob and negative prob and the sum of them is 1 ?

Answer 1

I am writing this answer for anyone who needs further clarifications:

If it is a binary classification, it should be:

prediction = tf.round(tf.nn.sigmoid(logit))

If it is a multi-class classification:

prediction = tf.nn.softmax(logit)

then using the argmax function you can get the index of the class that has the highest probability score.

np.argmax(prediction, 0)

Answer 2

predictions = tf.nn.softmax(logits)