ve {desc} of {name1} or {name2}.

See Also
--------
core.window.expanding.Expanding.{accum_func_name} : Similar functionality
    but ignores ``NaN`` values.
{name2}.{accum_func_name} : Return the {desc} over
    {name2} axis.
{name2}.cummax : Return cumulative maximum over {name2} axis.
{name2}.cummin : Return cumulative minimum over {name2} axis.
{name2}.cumsum : Return cumulative sum over {name2} axis.
{name2}.cumprod : Return cumulative product over {name2} axis.

{examples}a½