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How to filter a data frame

I have a data frame and tried to select only the observations I\'m interested in by this: data[data[\"Var1\"]>10][详细]

2023-03-29 13:31 分类：问答
Error: could not find function ... in R

This is meant to be a FAQ question, so please be as complete as possible. The answer is a community answer, so feel free to edit if you think something is missing.[详细]

2023-03-27 03:35 分类：问答
How to unload a package without restarting R

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[详细]

2023-03-26 08:59 分类：问答
ggplot's qplot does not execute on sourcing

Let\'s assume I have 2 source files, the first one named example1.r and the second one example2.r (given below).[详细]

2023-03-19 17:19 分类：问答
What does "S3 methods" mean in R?

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[详细]

2023-03-17 22:03 分类：问答
Remove an entire column from a data.frame in R

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:[详细]

2023-03-11 19:37 分类：问答
Read an Excel file directly from a R script

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[详细]

2023-03-08 00:40 分类：问答
Calculate group mean, sum, or other summary stats. and assign column to original data

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\[详细]

2023-03-07 02:45 分类：问答
How to remove all whitespace from a string?

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:[详细]

2023-03-05 22:34 分类：问答
How to make a great R reproducible example

开发者_如何学JAVAThis question's answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions.[详细]

2023-03-04 06:52 分类：问答