r - assigning columns using ifelse and within -


why function ifelse , within cannot work together? example illustrate problem, have following code. wanted create 2 columns (petal.dim1 , petal.dim2 petal.width , petal.length) switches whenever sepal.length greater 5. 

data(iris) within(iris, ifelse(sepal.length>5,{                 petal.dim1 <-petal.width                 petal.dim2 <-petal.length             }, {                 petal.dim1<-petal.length                 petal.dim2<-petal.width}))

i can not wrong code, can suggest use transform:

data(iris) dat <- transform(iris,      petal.dim1=ifelse(sepal.length>5, petal.width, petal.length),     petal.dim2=ifelse(sepal.length>5, petal.length, petal.width) ) str(dat)

edit: more robust way (in opinion) store indizes , avoid within or transform:

idx <- iris[,"sepal.length"] > 5 dat <- iris dat[idx, "dim1"] <- petal.width dat[idx, "dim2"] <- petal.length dat[!idx, "dim1"] <- petal.length dat[!idx, "dim2"] <- petal.width

maybe faster, not sure that.


Comments

Post a Comment

Popular posts from this blog

user interface - How to replace the Python logo in a Tkinter-based Python GUI app? -

is there way change default logo, python logo , appears in window's task bar? notice have replaced default tk logo used appear in application window. i using windows 7 , python 2.6 , developing gui of tkinter. you can using winico tk extension package. winico package can used add system tray icons tk programs. the following sample shows 1 way change runtime application icon. note need provide .ico file suitable sizes of icons in on command line , need use pythonw. not change taskbar icon console when running python script. test extracted winico0.6 package python\tcl\winico0.6 folder package require winico work , ran code below using pythonw winico_test.py path\to\some\ico\file.ico . import sys tkinter import * def main(argv): root = tk() root.update() root.tk.call('package','require','winico') id = root.tk.call('winico','createfrom',argv[1]) root.tk.call('winico','setwindow',root,id...
Read more

netbeans - Remove indent guide lines -

Image
netbeans 8 default shows indent guide lines (light gray dotted vertical lines). how can turn feature off? this can turned off in menu: view > show indent guide lines. more configuring indent lines in release notes . release notes the guide lines dotted lines drawn every tab size before character on line. shown default. can turn off feature in menu view-show indent guide lines. change line's color go options-font&colors-highlighting-indent guide lines.
Read more

android - Get AccessToken using signpost OAuth without opening a browser (Two legged Oauth) -

i using signpost oauth access data magento server. have read various tutorials on same , reach point open browser user can enter credentials. however, per requirement have automate part. hence, user should not browser page. have set-up done on server side ( magento ), hit url , returned call page. same through program in android. i have tried below, consumer = new commonshttpoauthconsumer(key, secret); provider = new commonshttpoauthprovider(oauth_init_url,access_token_url, authorize_url); try { provider.retrieverequesttoken(consumer, oauth.out_of_band); log.d("tokens" , consumer.gettoken() + " -- " + consumer.gettokensecret()); } and request tokens. dont know how bypass next step. tried directly accessing accesstoken (stupid of me) provider.retrieveaccesstoken(consumer, "mycallback://callback"); no luck, ends in oauth.signpost.exception.oauthnotauthorizedexception: authorization failed (server replied 401). ...
Read more