Richie Cotton

Richie Cotton has asked 125 questions and find answers to 410 problems.

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About

I'm Head of Content Quality at DataCamp. I wrote a Learning R and Testing R Code.

My github and Bitbucket repos, LinkedIn and twitter accounts.

Richie Cotton questions

How to animate points with gridSVG in a vectorised way?
Transfer data from database to Spark using sparklyr
How do you control the formatting of digits when converting lists of numbers to character?
Making non-ASCII data suitable for CRAN
Generating lognormally distributed random number from mean, coeff of variation
Non-standard subsetting of data.frames
How to store data in a Spark cluster using sparklyr?
How do you retrieve the selected text in MATLAB?
How do you test a custom expectation?
In pandas, how to pivot a dataframe on a categorical series with missing categories?

Richie Cotton answers

Plotting a data.frame in R
Matlab arrays operation
How to get over the semi-advanced, intermediate hump in R?
R time series object with two time dimensions
Histogram with curve in R
How to summarize multiple files into one file based on an assigned rule?
warning messages: replacing previous import by plyr:: when loading my package [duplicate]
What's an efficient (or the most efficient) way to index nested lists/environments?
How to debug methods from Reference Classes?
Convert colors to imitate greyscale printing