python - Does pandas reindex `method` kwag not work with columns? -

-

i trying simple operation:

df = pd.dataframe(np.random.rand(5,3)) df.columns = df.columns * 3 print(df.reindex(columns=np.arange(9), method='ffill').head())

and this:

          0   1   2         3   4   5         6   7   8 0  0.593936 nan nan  0.805081 nan nan  0.930780 nan nan 1  0.019330 nan nan  0.095645 nan nan  0.667744 nan nan 2  0.826164 nan nan  0.295915 nan nan  0.259967 nan nan 3  0.495695 nan nan  0.403194 nan nan  0.122684 nan nan 4  0.365294 nan nan  0.648194 nan nan  0.621820 nan nan

but, of course, expect see this:

           0           1           2           3           4           5           6           7           8 0   0.593936    0.593936    0.593936    0.805081    0.805081    0.805081    0.930780    0.930780    0.930780 1   0.019330    0.019330    0.019330    0.095645    0.095645    0.095645    0.667744    0.667744    0.667744 2   0.826164    0.826164    0.826164    0.295915    0.295915    0.295915    0.259967    0.259967    0.259967 3   0.495695    0.495695    0.495695    0.403194    0.403194    0.403194    0.122684    0.122684    0.122684 4   0.365294    0.365294    0.365294    0.648194    0.648194    0.648194    0.621820    0.621820    0.621820

i can achieve goal battery of .fillna , slicing, there more elegant? (note, using pandas 0.18.1)

starting 3 column data frame,

df  #          0           3           6 #0  0.563483    0.404885    0.336098 #1  0.097173    0.141343    0.564055 #2  0.715131    0.185852    0.361714 #3  0.841248    0.028190    0.754315 #4  0.475066    0.592953    0.839101

to expand columns , forward fill along rows, can reindex columns firstly , ffill() axis = 1 specify fill direction along rows:

df.reindex(columns=np.arange(15)).ffill(axis = 1)  #          0           1           2           3           4           5           6           7           8           9          10          11         12           13          14 #0  0.563483    0.563483    0.563483    0.404885    0.404885    0.404885    0.336098    0.336098    0.336098    0.336098    0.336098    0.336098    0.336098    0.336098    0.336098 #1  0.097173    0.097173    0.097173    0.141343    0.141343    0.141343    0.564055    0.564055    0.564055    0.564055    0.564055    0.564055    0.564055    0.564055    0.564055 #2  0.715131    0.715131    0.715131    0.185852    0.185852    0.185852    0.361714    0.361714    0.361714    0.361714    0.361714    0.361714    0.361714    0.361714    0.361714 #3  0.841248    0.841248    0.841248    0.028190    0.028190    0.028190    0.754315    0.754315    0.754315    0.754315    0.754315    0.754315    0.754315    0.754315    0.754315 #4  0.475066    0.475066    0.475066    0.592953    0.592953    0.592953    0.839101    0.839101    0.839101    0.839101    0.839101    0.839101    0.839101    0.839101    0.839101

Comments

Post a Comment

Popular posts from this blog

mysql - Dreamhost PyCharm Django Python 3 Launching a Site -

-
i'm new python/django , created simple django website using pycharm. site works fine running on computer, i'm lost when comes taking site onto host (dreamhost). i'm able upload files correct directories fine, , believe made correct changes database on mysql. i'm not sure go there though. right now, page shows files rather site. direction appreciated. much! you should not run django application using python manage.py runserver on production. how run application on django depends on server (apache, nginx) want use for apache - https://docs.djangoproject.com/en/1.10/howto/deployment/wsgi/modwsgi/ for nginx - https://www.digitalocean.com/community/tutorials/how-to-serve-django-applications-with-uwsgi-and-nginx-on-ubuntu-14-04 the mysql database should, of course, exist , have correct credentials. or, if choose use sqlite, file should accessible, readable , writable www-user (may different depending on linux distributive)
Read more

java - Sending SMS with SMSLib and Web Services -

-
i have made rest web service send smss using hsdpa usb modem. using smslib in java send smss. every time web service invoked, create gateway start service, send message, stop service , remove gateway. takes 20 seconds each message. found starting service takes lot of time. part of code use send smss service.getinstance().addgateway(gateway); service.getinstance().startservice(); outboundmessage msg = new outboundmessage(phonenumber, message); if (service.getinstance().sendmessage(msg)) { result = "message sent successfully!!"; } else { result = "could not send message."; } service.getinstance().stopservice(); service.getinstance().removegateway(gateway);//remove gateway is there way can start service once if not started , use send message when ever web service invoked? why dont group messages , send in 1 go? service.getinstance().sendmessages(messa...
Read more

java - How to resolve The method toString() in the type Object is not applicable for the arguments (InputStream) -

-
i'm trying read json file local machine. @path("/") public class jsonparsing { file f = new file("file.json"); if (f.exists()){ inputstream = new fileinputstream("file.json"); string jsontxt = ioutils.tostring(is); system.out.println(jsontxt); jsonobject json = new jsonobject(jsontxt); string = json.getstring("1000"); system.out.println(a); } } but i'm getting error in tostring() method. possible read .txt file containing json object local machine? if possible, how done? firstly: whenever ask question- add imports well. secondly: yes possible read .txt file containing json object. steps: 1. add maven dependency in pom.xml - <dependency> <groupid>com.googlecode.json-simple</groupid> <artifactid>json-simple</artifactid> <version>1.1.1</version> </dependency> or add jar of dependency. 2.import...
Read more