Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
Elementwise selecting of one of two inputs given a condition.
BS.Boolean.If (condition, thenValue, elseValue)
Parameters
condition: condition according to which element values are selectedthenValue: element value selected ifconditionelement is not 0elseValue: element value selected ifconditionelement is 0
Sparse values are currently not supported.
Return Value
A tensor of the dimension of the inputs. If any of the inputs have dimensions of 1, broadcasting is applied; in that case, the output dimension becomes the maximum over the corresponding three arguments' dimensions.
Description
If() selects elements from two inputs based on a condition, in an elementwise fashion.
For every input element where condition is non-0, the corresponding element from thenValue
is chosen; and where condition is 0, the corresponding elseValue element is chosen.
This function supports broadcasting. For example, it is possible that the condition is a scalar, or one of the inputs is a constant tensor without time dimension.
Example
The elementwise maximum of two inputs can be computed as a combination of Greater() and If():
MyElementwiseMax (a, b) = BS.Boolean.If (Greater (a, b), a, b)
This also works with broadcasting. For example, the linear rectifier can be written with this using a scalar constant as the second input:
MyReLU (x) = MyElementwiseMax (x, Constant(0))