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How to derive equation (6.23) from (6.22) ?by Fan Li

I have a question about the sigmoid function as the question.

I wish some help on this problem.

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P(y) = exp(y*z)/SUM[y'=0..1](y'*z) = exp(y*z)/(exp(0*z)+exp(1*z)) = exp(y*z)/(1+exp(z)) 6.22

P(y) = Sigmoid((2*y-1)*z) 6.23

where

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2.

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Chapter 6, Section 6.2.2.3 Page 187by Lalit Kumar

A line in first paragraph says "Defining P(y=1|x)=sigmoid(z) is equivalent to defining P(y=1|x) = softmax(z)1 with two-dimensional z and z1=0."

Could anybody help me understand this line?

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Introduce yourself!by Keshav Dhandhania

A discussion for people to introduce themselves. Share your level of expertise, what you're looking for in this community, how you got started in deep learning, or anything else you'd like!

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Abdulrehman Azam2y

Hello EveryOne !!!

I am Abdulrehman working as Graduate Researcher in a University of Engineering and Technology, Lahore Pakistan. I have bee...

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Introduce yourself!by Keshav Dhandhania

A discussion for people to introduce themselves. Share your level of expertise, what you're looking for in this community, how you got started in deep learning, or anything else you'd like!

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Hidehiro Nagaoka2y

Hi guys! I'm a 30 years old software engineer living in Japan.

Recently, I'm studying machine learning and deep learning for my product and investment for myself.

I'm using text book from Raschka and Udacity deep le...

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5.

discussion

Chapter 2, Section 2.12 Page 47by Abhinaw Raj

After Equation 2.67, the new paragraph says that since we're using the same matrix D to decode all the points, we can no longer consider the points in isolation. Then the author uses the Frobenius norm of the matrix instead of the L2 norm used before. So, why is that?

Also, what are the limits of summation in the norm and how are we defining the transformation on a scalar, ie r(x⁽ⁱ⁾)_j

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NaN.

discussion

Introduce yourself!by Keshav Dhandhania

A discussion for people to introduce themselves. Share your level of expertise, what you're looking for in this community, how you got started in deep learning, or anything else you'd like!

Read more…(31 words)

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Hi,everyone , i am a Chinese student ,not a native English speaker , so you should cost much time to understand my english.

I am a senior student at the jiangsu University, maj...

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