r-faq

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Filter data.frame rows by a logical condition
user_1014190
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182
9
373835
subset r-faq dataframe r
How to sum a variable by group
user_1775410
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476
17
878596
r-faq dataframe aggregate r
What's the biggest R-gotcha you've run across?
user_1474270
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58
29
6539
r-faq r
How to read data when some numbers contain commas as thousand separator?
user_1441570
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142
11
147353
r-faq csv r
Fitting a density curve to a histogram in R
user_1775410
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101
7
295812
curve-fitting r-faq histogram r
Why can't R's ifelse statements return vectors?
user_844580
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142
9
49163
vectorization r-faq if-statement r
How to join (merge) data frames (inner, outer, left, right)
user_239290
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1477
13
1656170
r-faq r
Sort (order) data frame rows by multiple columns
user_844580
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1454
19
1318181
r-faq dataframe r sorting
Side-by-side plots with ggplot2
user_844580
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423
14
585770
ggplot2 r-faq r visualization
Multiline Comment Workarounds?
user_1446010
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118
11
60911
r-faq comments r
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