# cf constants¶

cf.masked

The cf.masked constant allows data array values to be masked by direct assignment. This is consistent with the behaviour of numpy masked arrays.

For example, masking every element of a field’s data array could be done as follows:

>>> f[...] = cf.masked


To mask every element of a field’s data array whose value is less than zero:

>>> g = f.where(cf.lt(0), cf.masked)