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cntk:sequence-unpack

cntk:sequence-unpack(
   $x as cntk:variable,
   $padding-value as cntk:variable,
   $supress-mask-output as cntk:variable,
   $name as xs:string
) as cntk:function

Summary

Create an instance of the CNTK built-in operator for unpacking the specified sequence operand along the most significant static axis [-1] and padding any gaps with the specified padding value. If supressMaskOutput is false, the returned Function has 2 outputs; viz. the unpacked non-sequence data and a mask denoting the gaps in the unpacked output due to differences across lengths of the sequences in the operand.

Parameters
$x The sequence tensor (or its name) which is unpacked.
$padding-value The value to pad gaps in the unpacked tensor with.
$supress-mask-output Whether the Function has a mask tensor output denoting the gaps in the unpacked output due to differences across lengths of the sequences in the operand.
$name The name of the function instance in the network.

Example

  let $input-variable1 := cntk:input-variable(cntk:shape((2)), "float",
    fn:false(), fn:false(), "feature")
  return cntk:sequence-unpack($input-variable1,0.0,fn:true())
  => cntk:function(Composite UnpackSequenceOp (Input(Name(feature),
  Shape([2]), Dynamic Axes([Sequence Axis(Default Dynamic Axis), Batch Axis
  (Default Batch Axis)]))))

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