ENH: Index should have diff() method

[jbrockmendel]

[jbrockmendel]

Also round

[jorisvandenbossche]

In addition to numeric indices, this would also be useful for datetimelike indices (and avoid a .to_series() call to just calculate the diff)

[vamsi231297]

Hi @jorisvandenbossche ; can you explain briefly what this issue is about?

[jppcr]

I'm thinking of contributing to this. It would be my first contribution to Pandas :)

Is the correct place to implement this, in pandas/core/base.py inside the IndexOpsMixin class? Should this use the diff function of pandas/core/algorithms.py?

Thanks in advance.

[jbrockmendel]

Is the correct place to implement this, in pandas/core/base.py inside the IndexOpsMixin class?

Probably on Index.

Should this use the diff function of pandas/core/algorithms.py?

Either that or to something like return Index(self.to_series().diff(n))