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Filter data.frame rows by a logical condition

看风景的人·2018-12-31 02:55·8 回答·问答

Is R's apply family more than syntactic sugar?

伤终究还是伤i·2018-12-31 02:57·5 回答·问答

Adding Regression Line Equation and R2 on graph

不流泪的眼·2018-12-31 02:51·5 回答·问答

Subset by group with data.table

情到深处是孤独·2018-12-31 03:18·1 回答·问答

What are the differences between “=” and “<-” i

路过你的时光·2018-12-31 02:43·7 回答·问答

Count number of rows within each group

皆成旧梦·2018-12-31 02:40·12 回答·问答

Aggregating by unique identifier and concatenating

人间绝色·2018-12-31 02:55·4 回答·问答

Plotting two variables as lines using ggplot2 on t

路过你的时光·2018-12-31 03:00·4 回答·问答

How do I deal with special characters like \^$.?*|

人间绝色·2018-12-31 02:35·2 回答·问答

Finding ALL duplicate rows, including “elements wi

步步皆殇っ·2018-12-31 02:13·3 回答·问答

Understanding exactly when a data.table is a refer

余生无你·2018-12-31 02:06·2 回答·问答

Calculate the mean by group

查无此人·2018-12-31 02:28·3 回答·问答

Replicate each row of data.frame and specify the n

明月照影归·2018-12-31 01:55·5 回答·问答

How to add leading zeros?

美炸的是我·2018-12-31 01:46·8 回答·问答

Remove rows with all or some NAs (missing values)

浮光初槿花落·2018-12-31 01:24·15 回答·问答

Converting year and month (“yyyy-mm” format) to a

看风景的人·2018-12-31 01:34·7 回答·问答

Faster ways to calculate frequencies and cast from

听够珍惜·2018-12-31 01:41·3 回答·问答

Why is `[` better than `subset`?

初与友歌·2018-12-31 01:50·2 回答·问答

Reshape three column data frame to matrix (“long”

宁负流年不负卿·2018-12-31 01:31·4 回答·问答

Numbering rows within groups in a data frame

几人难应·2018-12-31 01:21·5 回答·问答

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