I have a data frame and tried to select only the observations I\'m interested in by this: data[data[\"Var1\"]>10]
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I\'d like to unload a package without having to restart R (mostly because restarting R as I try out different, conflicting packages is getting frustrating, but conceivably this could be used in a prog
Let\'s assume I have 2 source files, the first one named example1.r and the second one example2.r (given below).
Since I am fairly new to R, I do not know what the S3 methods and objects are. I found that there are S3 and S4 objec开发者_StackOverflow中文版t systems, and some recommend to use S3 over S4 if possib
Does anyone know how to remove an entire column from a data.frame in R? For example if I am given this开发者_如何学Python data.frame:
How can I read an Excel file directly into R? Or should I fir开发者_StackOverflow中文版st export the data to a text- or CSV file and import that file into R?Let me reiterate what @Chase recommended: U
I want to calculate mean (or any other summary statistics of length one, e.g. min, max, length, sum) of a numeric variable (\"value\") within each level of a grouping variable (\"grou开发者_开发技巧p\
So \" xx yy 11 2233 \" will beco开发者_StackOverflow社区me \"xxyy112233\". How can I achieve this?In general, we want a solution that is vectorised, so here\'s a better test example:
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