### Navigation

- index
- modules |
- next |
- previous |
- pandas 0.13.1 documentation »
- API Reference »
- pandas.Panel »

# pandas.Panel.mask

`Panel.``mask`(cond)

  Returns copy whose values are replaced with nan if the inverted condition is True

  Parameters : | cond : boolean NDFrame or array
  Returns : | wh: same as input

### Navigation

- index
- modules |
- next |
- previous |
- pandas 0.13.1 documentation »
- API Reference »
- pandas.Panel »