Top network posts

• 375 Why are these numbers not equal?
• 290 grep using a character vector with multiple patterns
• 223 Add legend to ggplot2 line plot
• 210 Error in if/while (condition) {: missing Value where TRUE/FALSE needed
• 198 adding x and y axis labels in ggplot2
• 128 set only lower bound of a limit for ggplot
• 105 How to delete multiple values from a vector?
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