python - pandas dataframe timeseries:linegraph per day -

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first of all: although quite experienced in spss, i'm absolute beginner in python , pandas. i'm trying learn because think it's far more versatile , flexible...

couldn't find python forum dummies ;) hope can help...

my question: i've got dataframe traffic-data per period of 5 minutes:

in[37]: df.head(3) out[37]:                       rws01_monibas_0121hrr0070ra_speed  \ time                                                      2014-09-29 15:00:00                         101.124752    2014-09-29 15:05:00                         100.626442    2014-09-29 15:10:00                         102.247742                          rws01_monibas_0121hrr0070ra_flow  \ time                                                      2014-09-29 15:00:00                              1824    2014-09-29 15:05:00                              2184    2014-09-29 15:10:00                              1908     in[38]: df.tail(3) out[38]:                       rws01_monibas_0121hrr0070ra_speed  \ time                                                      2014-10-03 19:45:00                          99.089214    2014-10-03 19:50:00                         101.561825    2014-10-03 19:55:00                         101.178173                          rws01_monibas_0121hrr0070ra_flow  \ time                                                      2014-10-03 19:45:00                               804    2014-10-03 19:50:00                              1128    2014-10-03 19:55:00                              1284

the dataframe consists of multiple days (in example 4, test-set) , indexed on time. i'm trying split dataframe per date, , create linegraph per date.

when try select part dataframe , create graph df.plot, graph days, whatever do. doing wrong?

part of code:

df['day']=pd.datetimeindex(df['time']).day #select specific day select=pd.series(['23']) df[df.day.isin(select)] df.plot(kind='line',y=2) plt.show()

thanks in advance help, niels

couple of issues:

  1. you plotting original frame instead of filtered one

    df[df.day.isin(select)].plot(kind='line',y=2)

  2. day column integer datatype

    select=pd.series([23])

this best place start http://shop.oreilly.com/product/0636920023784.do


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