Chase

Chase has asked 14 questions and find answers to 224 problems.

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Director, Advanced Analytics @ the Chicago Cubs

Chase questions

Identify duplicate data with a threshold
Algorithm to determine proper divisors
mapply recycling arguments
Recreate minitab normal probability plot
Calculate monthly average of ts object
Identify all objects of given class for further processing
Optimization with Constraints
Counts & Percentages in xTable, Sweave, R, cross tabulations
ggplot legend issue w/ geom_point and geom_text
Moving beyond R's optim function

Chase answers

unsplit list, merge factors
How would you do this task using SQL or R library sqldf?
How to reduce a data frame keeping the order for other columns
How to change line and shape colours in ggplot2?
R: t tests on rows of 2 dataframes
ggplot2 change legend title in this particular example [duplicate]
Save a file interactively?
Sets in R DataFrame
pairwise.wilcox.test - reformat output
Efficient way to get highly correlated pairs from large data set in Python or R