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r - How do you specifically order ggplot2 x axis instead of . . . A factor is a vector of integers, each of which is associated with a character 'label' When you create a factor by reading a column of character values in a text file (e g csv), R assigns the integer values in alphabetical order rather than in the order they appear in the file
when to use factor () when plotting with ggplot in R? ggplot(mtcars) + geom_point(aes(x=mpg, y=drat, colour=factor(gear))) Is the general rule to use factor when the variable being used to determine the shape size colour is discrete, and not continuous? Or is there another use of factor in this context? It seems like the first command can be made like the second with the right legend, even without factor thanks edit: I get this when I use the
r - Why use as. factor () instead of just factor () - Stack Overflow ‘factor(x, exclude = NULL)’ applied to a factor without ‘NA’s is a no-operation unless there are unused levels: in that case, a factor with the reduced level set is returned ‘as factor’ coerces its argument to a factor It is an abbreviated (sometimes faster) form of ‘factor’ Performance: as factor > factor when input is a factor The word "no-operation" is a bit ambiguous
r - ggplot2: Reorder items in a legend - Stack Overflow (2) I cannot find a question about ordering (of axis or legend elements) in ggplot2 that is not completely resolved by the use of factor( , levels=) When you define the factor and specify the ordering of said factors using levels=, then ggplot2 tends to honor that specification
What is the most efficient way of finding all the factors of a number . . . The issue with this solution is that it checks many numbers that can't possibly be factors -- and it checks the higher of each factor-pair separately when you already know it is a factor after finding the smaller of the factor-pair