apoc.math.sigmoidPrime

Details
Syntax	`apoc.math.sigmoidPrime(value)`
Description	Returns the sigmoid prime [ sigmoid(val) * (1 - sigmoid(val)) ] of the given value.
Arguments	Name	Type	Description
	`value`	`FLOAT`	An angle in radians.
Returns	`FLOAT`

Usage Examples

Both apoc.math.sigmoidPrime() and Cypher’s exp() function can be used to return the sigmoid of a value.

WITH -1 AS x
RETURN apoc.math.sigmoidPrime(x) AS result;

Cypher’s exp() function

WITH -1 AS x
WITH x, 1 / (1 + exp(-x)) AS cypherSigmoid
RETURN cypherSigmoid * (1 - cypherSigmoid) AS result

Results
result
0.19661193324148185