Questions tagged [r-faq]

20

votes

4

answers

ERROR: a 'NAMESPACE' file is required

r namespaces r-faq

asked 2013-06-19T16:15:04.953

70

votes

10

answers

Create an ID (row number) column

r dataframe r-faq

asked 2013-05-05T13:19:19.190

241

votes

3

answers

Use of ~ (tilde) in R programming Language

r r-faq r-formula

asked 2013-02-20T09:27:57.883

153

votes

2

answers

Convert UNIX epoch to Date object

r time r-faq

asked 2012-11-19T14:51:52.680

41

votes

1

answers

What are the differences between concatenating strings with cat() and paste()?

r character string-concatenation r-faq

asked 2012-10-08T03:52:58.517

91

votes

8

answers

Round up from .5

r rounding r-faq

asked 2012-10-02T10:33:04.380

19

votes

4

answers

Convert list to data frame while keeping list-element names

r list dataframe r-faq

asked 2012-09-28T11:52:53.193

91

votes

3

answers

Why is `vapply` safer than `sapply`?

r apply r-faq

asked 2012-09-09T13:51:11.273

109

votes

7

answers

Apply several summary functions (sum, mean, etc.) on several variables by group in one call

r aggregate r-faq

asked 2012-08-21T22:55:50.790

97

votes

20

answers

Generate a dummy-variable

r r-faq

asked 2012-08-02T23:07:38.897

32

votes

9

answers

Transpose / reshape dataframe without "timevar" from long to wide format

r reshape transpose r-faq

asked 2012-07-04T05:16:24.290

212

votes

11

answers

Replace all 0 values to NA

r r-faq

asked 2012-06-14T16:03:13.400

72

votes

5

answers

Split data.frame based on levels of a factor into new data.frames

r dataframe r-faq

asked 2012-03-15T02:43:06.470

54

votes

4

answers

Plot multiple columns on the same graph in R

r ggplot2 r-faq

asked 2012-03-02T10:41:34.873

277

votes

7

answers

Find the day of a week

r date r-faq

asked 2012-02-09T17:54:53.597

76

votes

8

answers

duplicate 'row.names' are not allowed error

r csv r-faq

asked 2012-01-13T16:41:46.187

246

votes

8

answers

Remove NA values from a vector

r na r-faq

asked 2011-10-09T22:08:07.370

51

votes

1

answers

One function to detect NaN, NA, Inf, -Inf, etc.?

r nan na r-faq

asked 2011-09-22T16:30:03.003

67

votes

12

answers

Count number of rows per group and add result to original data frame

r count aggregate r-faq

asked 2011-09-16T21:33:04.617

28

votes

4

answers

Index values from a matrix using row, col indices

r indexing matrix r-faq

asked 2011-08-03T00:41:37.993

68

votes

1

answers

ggplot's qplot does not execute on sourcing

r ggplot2 r-faq

asked 2011-07-13T06:46:09.450

67

votes

3

answers

Why do R objects not print in a function or a "for" loop?

r for-loop printing r-faq

asked 2011-01-17T17:49:30.793

80

votes

4

answers

do-while loop in R

r loops repeat do-while r-faq

asked 2010-12-05T07:29:46.217

363

votes

19

answers

ggplot with 2 y axes on each side and different scales

r ggplot2 r-faq

asked 2010-06-23T05:52:19.900

161

votes

10

answers

Using R to download zipped data file, extract, and import data

r connection zip r-faq

asked 2010-06-16T13:52:05.407

31

votes

2

answers

How to perform natural (lexicographic) sorting in R?

r sorting natural-sort r-faq

asked 2010-05-06T02:18:48.387

112

votes

6

answers

How to name variables on the fly?

r assign r-faq

asked 2010-04-20T22:38:26.430

36

votes

1

answers

Generate multiple graphics from within an R function

r ggplot2 r-faq

asked 2010-03-30T17:40:06.680

86

votes

3

answers

Convert a dataframe to a vector (by rows)

r dataframe vector r-faq

asked 2010-03-30T12:48:04.793

160

votes

4

answers

Controlling number of decimal digits in print output in R

r precision digits r-faq output-formatting

asked 2010-02-18T09:48:37.263

503

votes

8

answers

How do I install an R package from source?

r install.packages r-faq

asked 2009-09-24T20:51:30.880

20

votes

5

answers

Storing R Objects in a relational database

database r object r-faq

asked 2009-09-08T17:06:51.417

160

votes

9

answers

Why can't R's ifelse statements return vectors?

r if-statement vectorization r-faq

asked 2009-08-26T16:06:33.240

459

votes

14

answers

Side-by-side plots with ggplot2

r ggplot2 visualization r-faq

asked 2009-08-08T18:16:43.670

127

votes

16

answers

Multiline Comment Workarounds?

r comments r-faq

asked 2009-08-05T04:30:49.603

25

votes

7

answers

Finding All Positions for Multiple Elements in a Vector

r vector r-faq

asked 2009-07-23T03:10:59.123

375

votes

21

answers

How can I remove an element from a list?

r list indexing r-faq

asked 2009-03-16T20:59:36.223

Questions tagged r-faq