# cntk:softplus

cntk:softplus(
$x as cntk:variable,$name as xs:string
) as cntk:function

### Summary

Softplus operation. Computes the element-wise softplus of x: $$\mathrm{softplus}(x) = {\log(1+\exp(x))}$$ The optional steepness allows to make the knee sharper (steepness>1) or softer, by computing softplus(x * steepness) / steepness. (For very large steepness, this approaches a linear rectifier). The output tensor has the same shape as x.

Parameters
$x Any Function that outputs a tensor.$name The name of the function instance in the network.

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