transfer function purelin equation based on neural network toolbox
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what is equation of pureline based on neural network toolbox? as i have read before, that purelin transfer function is a = purelin(n) = n. but from simulation in neural network toolbox get different result from the equation. is the equation wrong?
thank you.
3 个评论
Brendan Hamm
2019-4-11
Your equation is correct, but in a neural network, n will be a linear combination of the inputs from the prior nodes multiplied by their weights and added to the bias.
So in effect purelin is just allowing this linear equation to pass to the next layer directly as opposed to applying another transfer function.
Arrya Anandika
2019-4-11
Greg Heath
2019-4-13
How are we supposed to know what you did wrong if you don't demonstrate it???
Greg
回答（1 个）
Greg Heath
2019-4-11
0 个投票
Read the documentation
help purelin
doc purelin
Greg
6 个评论
Arrya Anandika
2019-4-11
Greg Heath
2019-4-11
编辑：Greg Heath
2019-4-11
The weights are used on the transformed variables, not the originals.
Hope this helps.
Greg
Arrya Anandika
2019-4-12
Brendan Hamm
2019-4-12
The input layer will include a mapminmax transformation, which maps the minimum value of each input to -1 and the maximum value to +1.
Arrya Anandika
2019-4-13
Greg Heath
2019-4-13
编辑：Greg Heath
2019-4-13
- Now and in the future,
SHOW EXACTLY WHAT YOU DID IN ADDITION IN YOUR ATTEMPT TO EXPLAIN IT!
2. Have you read the documentation and tried the examples?
Greg
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