sigmoid(x[,a[,b]])
Returns the sigmoid of x, where a controls the slope and defaults to 1, and b controls the location and defaults to 0. The result is centered around b; it will be about 0 at b-6a and about 1 at b+6a..
![](/content/dam/dita/en/factorytalk-data-explorer/4-05-00/user-guide/transform-reference/transform-sigmoid.png/_jcr_content/renditions/original)
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