From 2c8cbb8c3fd779a9993afd623e4ee53ed047a4ec Mon Sep 17 00:00:00 2001 From: zchen0211 Date: Wed, 13 Sep 2017 15:39:29 -0700 Subject: [PATCH] if_else_op.md --- doc/design/if_else_op.md | 22 ++-------------------- 1 file changed, 2 insertions(+), 20 deletions(-) diff --git a/doc/design/if_else_op.md b/doc/design/if_else_op.md index 7370c2a24fa..954a19c0733 100644 --- a/doc/design/if_else_op.md +++ b/doc/design/if_else_op.md @@ -1,22 +1,4 @@ -IfOp should have only one branch. An IfOp operator takes a `cond` variable whose value must be a vector of N boolean elements. Its return value has M (M<=N) instances, each corresponds to a true element in `cond`. - -```python -import paddle as pd - -x = var() -y = var() -cond = var() - -b = pd.create_ifop(inputs=[x], output_num=1) -with b.true_block(): - x = b.inputs(0) - z = operator.add(x, y) - b.set_output(0, operator.softmax(z)) - -out = b(cond) -``` - -If we want the output still has N instances, we can use IfElseOp with a default value, whose minibatch size must be N: +IfOp should have only one branch. An IfOp operator takes a `cond` variable whose value must be a vector of N boolean elements. Its return value has N instances. If cond[i] == True, input instance input[i] will go through true_block() and generate output[i]; otherwise it will produce output from false_bloack(). ```python import paddle as pd @@ -39,7 +21,7 @@ with b.false_block(): out = b(cond) ``` -If only true_block is set in an IfElseOp, we can have a default value for false as: +If only true_block is set in an IfElseOp, a special case is that we can have a default value for false as: ```python import paddle as pd -- GitLab