Top Questions

1. Using R, for each year, I need to sum the sales in different years between same two dates
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2. Need R code with GREP to extract numbers from string containing special characters
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3. Need to extract individual characters from a string column using R
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   2 answers
4. Cannot group data by a column in R
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5. In ggplot2 bar chart legend elements in wrong order and one player's bar colors are off
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