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 …
r - list all factor levels of a data.frame - Stack Overflow
Dec 28, 2014 · with dplyr::glimpse(data) I get more values, but no infos about number/values of factor-levels. Is there an automatic way to get all level informations of all factor vars in a …
How to force R to use a specified factor level as reference in a ...
When creating the factor from b you can specify the ordering of the levels using factor(b, levels = c(3,1,2,4,5)). Do this in a data processing step outside the lm() call though. My answer below …
when to use factor () when plotting with ggplot in R?
Feb 25, 2013 · 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 …
r - How to convert a factor to integer\numeric without loss of ...
See the Warning section of ?factor: In particular, as.numeric applied to a factor is meaningless, and may happen by implicit coercion. To transform a factor f to approximately its original …
Convert all data frame character columns to factors
Given a (pre-existing) data frame that has columns of various types, what is the simplest way to convert all its character columns to factors, without affecting any columns of other types? …
r - Convert factor to integer - Stack Overflow
Does anyone know of a way to coerce a factor into an integer? Using as.character() will convert it to the correct character, but then I cannot immediately perform an operation on it, and …
How can I customize the tab-to-space conversion factor in VS Code?
Apr 30, 2015 · How do I customize the tab-to-space conversion factor when using Visual Studio Code? For instance, right now in HTML it appears to produce two spaces per press of TAB, …
factor () command in R is for categorical variables with hierarchy ...
Oct 19, 2012 · I'm quite confused on when to use factor (educ) or factor (agegroup) in R. Is it used for categorical ordered data? or can I just use to it a simple categorical data with no hierarchy? …
r - Replace <NA> in a factor column - Stack Overflow
Sep 30, 2017 · In `[<-.factor`(`*tmp*`, iseq, value = c(88, 88)) : invalid factor level, NA generated I think I missed a fundamental R concept about factors. Am I? I can not understand why it …