> On Mar 30, 2016, at 3:56 PM, Norman Pat <normanma...@gmail.com> wrote: > > Hi team > > I am new to R so please help me to do this task. > > Please find the attached data sample.
No. Nothing attached. Please read the Rhelp Info page and the Posting Guide. > But in the original data frame I > have 350 features and 400000 observations. > > I need to carryout these tasks. Who is assigning you this task? Homework? (Read the Posting Guide.) > 1. How to Identify features (names) that have all zeros? That's generally pretty simple if "names" refers to columns in a dataframe. > > 2. How to remove features that have all zeros from the dataset? But maybe you mean to process by rows? > 3. How to identify features (names) that have outliers such as 99999,-1 in > the data frame. > > 4. How to remove outliers? You could start by defining "outliers" in something other than vague examples. If this is data from a real-life data gathering effort, then defining outliers would start with an explanation of the context. > > > Many thanks Please at least do the following "homework". > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. David Winsemius Alameda, CA, USA ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
