The right way to round pandas.DataFrame?

Question

I want round pandas.DataFrame.

Here is what i have tried so far:

import pandas as pd
data = pd.DataFrame([1.4,2.5,3.8,4.4,5.6],[6.2,7.6,8.8,9.1,0])
print(round(data))

But when i run this code, i get the following error:

Traceback (most recent call last):
  File "C:\Users\*****\Documents\*****\******\****.py", line 3, in <module>
    print(round(data))
TypeError: type DataFrame doesn't define __round__ method

What is the right way to round pandas.DataFrame ?

Dup of http://stackoverflow.com/q/19100540/564538 – Phillip Cloud Dec 08 '13 at 21:11 — Phillip Cloud, Dec 08 '13 at 21:11

behzad.nouri · Accepted Answer · 2015-03-24T11:35:14.043

14

first, you may want to change the definition of your data frame, something like:

data = pd.DataFrame([[1.4,2.5,3.8,4.4,5.6],[6.2,7.6,8.8,9.1,0]]).T

which results this:

     0    1
0  1.4  6.2
1  2.5  7.6
2  3.8  8.8
3  4.4  9.1
4  5.6  0.0

or:

data = pd.DataFrame({'A':[1.4,2.5,3.8,4.4,5.6],'B':[6.2,7.6,8.8,9.1,0]})

so that you get two columns, otherwise the other list is picked up as index; then:

data.apply(pd.Series.round)

or

import numpy as np
data.apply(np.round)

edited Mar 24 '15 at 11:35

answered Dec 08 '13 at 15:41

behzad.nouri

74,723
18
126
124

this rounds only first column – Michael Dec 08 '13 at 15:44
2

the way you are making the dataframe, the other column is index, pandas apply the functions to columns not the index – behzad.nouri Dec 08 '13 at 15:45
what about series, how can i round them? – Michael Dec 08 '13 at 15:46
1

series have method `round`, so just `ts.round` – behzad.nouri Dec 08 '13 at 15:46
9

Here is the best solution: `np.round(data, decimals=0)` – Michael Dec 08 '13 at 16:01

Vincent Claes · Answer 2 · 2018-05-02T12:15:57.273

6

Since pandas 0.17.0 you can use

DataFrame.round(decimals=0, *args, **kwargs)

If you want to round your data to 2 decimals do:

data.round(2)

more info here: http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.round.html

edited May 02 '18 at 12:15

answered Oct 13 '16 at 19:29

Vincent Claes

3,960
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Muhammad Yasirroni · Answer 3 · 2023-01-16T10:15:28.713

0

For those that come here but did not actually want to round the values, just when diplaying, use printoption as I explained in my other answer here

pd.set_option('display.precision', 3)

# or

from IPython.display import display

with pd.option_context('display.precision', 3):
    display(pd.DataFrame(data={'x':[1,2,3],
                               'y':[4,5,6]}))

edited Jan 16 '23 at 10:15

answered Nov 07 '22 at 01:43

Muhammad Yasirroni

1,512
12
22

The right way to round pandas.DataFrame?

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