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Roland

I am a soil ecologist and R user.

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Top Questions
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123
Add a common Legend for combined ggplots
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115
Extract a column from a data.table as a vector, by position
stackoverflow.com

98
Can I make an exam question for graduate & undergraduate students to find an idea in making a breakthrough in my research?
academia.stackexchange.com

90
Converting two columns of a data frame to a named vector
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82
Make Frequency Histogram for Factor Variables
stackoverflow.com

76
Who deserves to be first and second author? PhD student who collected data, research associate who wrote the paper or supervisor?
academia.stackexchange.com

74
calculating number of days between 2 columns of dates in data frame
stackoverflow.com

74
Convert all data frame character columns to factors
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69
Converting date to a day of week in R
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66
How can I make the people at my company understand that learning a spoken and written language takes time?
workplace.stackexchange.com

66
Unreasonable requests to a TA from a student
academia.stackexchange.com

61
Do ants or other insects sleep, and if so why?
biology.stackexchange.com

58
Convert a row of a data frame to vector
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58
Should I mention a mistake made by a third person?
academia.stackexchange.com

58
Populating a data frame in R in a loop
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57
Do people intentionally make papers shorter in order to avoid grammar or reference errors?
academia.stackexchange.com

52
What are the differences between vector, matrix and array data types?
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51
Add legend to geom_vline
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50
Why is Germany still opposed to nuclear power despite the energy crisis?
politics.stackexchange.com

49
ggplot geom_point() with colors based on specific, discrete values
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47
Represent numeric value with typical dollar amount format
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47
How to write a "reader-friendly" sessionInfo() to text file
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46
Add new row to dataframe, at specific row-index, not appended?
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44
Stacked bar chart
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43
Data used for analysis is not free. What should I do as a reviewer?
academia.stackexchange.com

42
How to convert character to numeric within data.table for specific columns?
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41
Finding the index inside a vector satisfying a condition
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39
Is it appropriate if my former advisor is editor of a journal I submit to?
academia.stackexchange.com

35
How to sum array along 3rd dimension
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35
merging multiple csv files in R using do.call
stackoverflow.com

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