Maiasaura

San Francisco, CA

I'm research assistant professor at UC Berkeley. I use R extensively in my work and as part of a side project, develop R based tools to facilitate open, reproducible science (see http://ropensci.org).

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Elegant way to check for missing packages and install them?

r packages r-faq asked Nov 3, 2010 at 18:08

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242 votes

How do you delete a column by name in data.table?

r data.table asked Feb 8, 2012 at 22:20

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209 votes

Is there a way to make R beep/play a sound at the end of a script?

r asked Jul 29, 2010 at 18:08

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121 votes

How do I arrange a variable list of plots using grid.arrange?

r ggplot2 asked May 22, 2012 at 17:08

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111 votes

How to name variables on the fly?

r assign r-faq asked Apr 20, 2010 at 22:38

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82 votes

Removing non-ASCII characters from data files

r unicode ascii non-ascii-characters asked Mar 29, 2012 at 23:06

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49 votes

Is there way to track progress on a mclapply?

r progress-bar mclapply asked Jun 11, 2012 at 17:10

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43 votes

Are there best/recommended practices to follow when renaming functions in a new version of a package?

r roxygen asked Apr 11, 2012 at 2:39

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41 votes

Loading many files at once?

r asked Sep 21, 2010 at 20:39

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38 votes

Fastest way to add rows for missing time steps?

r data.frame plyr data.table asked May 3, 2012 at 20:37

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Top Answers

104

R markdown: Accessing variable from code chunk (variable scope)

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100

How to control number of minor grid lines in ggplot2?

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What is the knitr equivalent of `R CMD Sweave myfile.rnw`?

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Export a graph to .eps file with R

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Colouring plot by factor in R

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Can I create an empty ggplot2 plot in R?

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Trying to merge multiple csv files in R

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How to open CSV file in R when R says "no such file or directory"?

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Use image instead of labels in ggplot2 legend

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Combined plot of ggplot2 (Not in a single Plot), using par() or layout() function?

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Reshaping wide to long with multiple values columns

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Loop in R to create and save series of ggplot2 plots with specified names

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Any way to make plot points in scatterplot more transparent in R?

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ggplot2 - bar plot with both stack and dodge

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Downloading JSON data into R

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Plotting a stacked bar plot?

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Embiggening a graph in ggplot2

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multiple ggplots overall title

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unique / sort in data.frame

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R ggplot2 change colours of dodged barchart

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Can dcast be used without an aggregate function?

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converting fahrenheit to celsius

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R ggplot2: Labelling a horizontal line on the y axis with a numeric value

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How to save a histogram from command line in R

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Outputting HTML code from inside R markdown

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Subsetting a vector with a logical condition

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function similar to head() for matrix

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How to pass a list to a function in R?

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Can I suppress the arrow (">") in the R/S output in Sweave?

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R reduce chart size and remove gray background from ggplot

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