CODEWITHSUNDEEP
pythonpython-3.xpandasdataframe
vasiop
vasiop

Reputation: 89

Pandas reorder rows of dataframe

I stumble upon very peculiar problem in Pandas. I have this dataframe

,time,id,X,Y,theta,Vx,Vy,ANGLE_FR,DANGER_RAD,RISK_RAD,TTC_DAN_LOW,TTC_DAN_UP,TTC_STOP,SIM
0,1600349033921610000,0,23.2643889,-7.140948599999999,0,0.020961,-1.1414197,20,0.5,0.9,-1,7,2.0,3
1,1600349033921620000,1,18.5371406,-14.224917,0,-0.0113912,1.443597,20,0.5,0.9,-1,7,2.0,3
2,1600349033921650000,2,19.808648100000006,-6.778450599999998,0,0.037289,-1.0557937,20,0.5,0.9,-1,7,2.0,3
3,1600349033921670000,3,22.1796988,-5.7078115999999985,0,0.2585675,-1.2431861000000002,20,0.5,0.9,-1,7,2.0,3
4,1600349033921670000,4,20.757325,-16.115366,0,-0.2528627,0.7889673,20,0.5,0.9,-1,7,2.0,3
5,1600349033921690000,5,20.9491012,-17.7806833,0,0.5062633,0.9386511,20,0.5,0.9,-1,7,2.0,3
6,1600349033921690000,6,20.6225258,-5.5344404,0,-0.1192678,-0.7889041,20,0.5,0.9,-1,7,2.0,3
7,1600349033921700000,7,21.8077004,-14.736984,0,-0.0295737,1.3084618,20,0.5,0.9,-1,7,2.0,3
8,1600349033954560000,0,23.206789800000006,-7.5171016,0,-0.1727971,-1.1284589,20,0.5,0.9,-1,7,2.0,3
9,1600349033954570000,1,18.555421300000006,-13.7440508,0,0.0548418,1.4426004,20,0.5,0.9,-1,7,2.0,3
10,1600349033954570000,2,19.8409748,-7.126075500000002,0,0.0969802,-1.0428747,20,0.5,0.9,-1,7,2.0,3
11,1600349033954580000,3,22.3263185,-5.9586202,0,0.4398591,-0.752425,20,0.5,0.9,-1,7,2.0,3
12,1600349033954590000,4,20.7154136,-15.842398800000002,0,-0.12573430000000002,0.8189016,20,0.5,0.9,-1,7,2.0,3
13,1600349033954590000,5,21.038901,-17.4111883,0,0.2693992,1.108485,20,0.5,0.9,-1,7,2.0,3
14,1600349033954600000,6,20.612499,-5.810969,0,-0.030080400000000007,-0.8295869,20,0.5,0.9,-1,7,2.0,3
15,1600349033954600000,7,21.7872537,-14.3011986,0,-0.0613401,1.3073578,20,0.5,0.9,-1,7,2.0,3
16,1600349033921610000,0,23.2643889,-7.140948599999999,0,0.020961,-1.1414197,20,0.5,0.9,-1,7,1.5,2
17,1600349033954560000,0,23.206789800000003,-7.5171016,0,-0.1727971,-1.1284589,20,0.5,0.9,-1,7,1.5,2
18,1600349033988110000,0,23.21602,-7.897527,0,0.027693000000000002,-1.1412761999999999,20,0.5,0.9,-1,7,1.5,2

This is input file Input

Please note that Id always starts at 0 up to 7 and repeat and time column is in sequential step (which implies that previous row should be smaller or equal to current one).

I would like to reorder rows of the dataframe as it is below.

,time,id,X,Y,theta,Vx,Vy,ANGLE_FR,DANGER_RAD,RISK_RAD,TTC_DAN_LOW,TTC_DAN_UP,TTC_STOP,SIM
0,1600349033921610000,0,23.2643889,-7.140948599999999,0,0.020961,-1.1414197,20,0.5,0.9,-1,7,1.0,2
1,1600349033954560000,0,23.206789800000003,-7.5171016,0,-0.1727971,-1.1284589,20,0.5,0.9,-1,7,1.0,2
2,1600349033988110000,0,23.21602,-7.897527,0,0.027693000000000002,-1.1412761999999999,20,0.5,0.9,-1,7,1.0,2
3,1600349033921610000,0,23.2643889,-7.140948599999999,0,0.020961,-1.1414197,20,0.5,0.9,-1,7,1.5,1
4,1600349033954560000,0,23.206789800000003,-7.5171016,0,-0.1727971,-1.1284589,20,0.5,0.9,-1,7,1.5,1
5,1600349033988110000,0,23.21602,-7.897527,0,0.027693000000000002,-1.1412761999999999,20,0.5,0.9,-1,7,1.5,1
6,1600349033921610000,0,23.2643889,-7.140948599999999,0,0.020961,-1.1414197,20,0.5,0.9,-1,7,1.5,2
7,1600349033954560000,0,23.206789800000003,-7.5171016,0,-0.1727971,-1.1284589,20,0.5,0.9,-1,7,1.5,2
8,1600349033988110000,0,23.21602,-7.897527,0,0.027693000000000002,-1.1412761999999999,20,0.5,0.9,-1,7,1.5,2
9,1600349033921610000,0,23.2643889,-7.140948599999999,0,0.020961,-1.1414197,20,0.5,0.9,-1,7,1.5,3
10,1600349033954560000,0,23.206789800000003,-7.5171016,0,-0.1727971,-1.1284589,20,0.5,0.9,-1,7,1.5,3
11,1600349033988110000,0,23.21602,-7.897527,0,0.027693000000000002,-1.1412761999999999,20,0.5,0.9,-1,7,1.5,3

This is the desired result Output

Please note that I need to reorder dataframe rows based on this columns id, time, ANGLE_FR, DANGER_RAD, RISK_RAD, TTC_DAN_LOW, TTC_DAN_UP, TTC_STOP, SIM.

As you see from the desired result we need to reoder dataframe in that way time column from smallest to largest one this holds true for the rest of columns, id, sim, ANGLE_FR, DANGER_RAD, RISK_RAD, TTC_DAN_LOW, TTC_DAN_UP, TTC_STOP.

I tried to sort by several columns without success. Moreover, I tried to use groupby but I failed. Would you like to help to solve the problem? Any suggestions are welcome.

P.S.

I have paste dataframe so they can be read easily with clipboard function in order to be easily reproducible.

I am attaching pic as well.

Upvotes: 0

Views: 342

Answers (2)

Serial Lazer
Serial Lazer

Reputation: 1669

How about this:

groupby_cols = ['ANGLE_FR', 'DANGER_RAD', 'RISK_RAD', 'TTC_DAN_LOW', 'TTC_DAN_UP', 'TTC_STOP, SIM']
df = df.groupby(groupby_cols).reset_index()

Upvotes: 0

maow
maow

Reputation: 2887

What did you try to sort by several columns?

In [10]: df.sort_values(['id', 'time', 'ANGLE_FR', 'DANGER_RAD', 'RISK_RAD', 'TTC_DAN_LOW', 'TTC_DAN_UP', 'TTC_STOP', 'SIM'])                                                                                      
Out[10]: 
    Unnamed: 0                 time  id        X        Y  theta      Vx      Vy  ANGLE_FR  DANGER_RAD  RISK_RAD  TTC_DAN_LOW  TTC_DAN_UP  TTC_STOP  SIM
0            0  1600349033921610000   0  23.2644  -7.1409      0  0.0210 -1.1414        20         0.5       0.9           -1           7         2    3
8            8  1600349033954560000   0  23.2068  -7.5171      0 -0.1728 -1.1285        20         0.5       0.9           -1           7         2    3
1            1  1600349033921620000   1  18.5371 -14.2249      0 -0.0114  1.4436        20         0.5       0.9           -1           7         2    3
9            9  1600349033954570000   1  18.5554 -13.7441      0  0.0548  1.4426        20         0.5       0.9           -1           7         2    3
2            2  1600349033921650000   2  19.8086  -6.7785      0  0.0373 -1.0558        20         0.5       0.9           -1           7         2    3

Upvotes: 1

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