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mindspore.nn.F1
=====================
.. py:class:: mindspore.nn.F1
计算F1 score。F1是Fbeta的特殊情况，即beta为1。
有关更多详细信息，请参阅类:class:`mindspore.nn.Fbeta`。
.. math::
F_1=\frac{2\cdot true\_positive}{2\cdot true\_positive + false\_negative + false\_positive}