Factor The Expression: $x^2-3 X$

‘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.

Trying to login after 2-factor authentication results in "wrong verification code. Dec 6, 2018the complete conversion of every character variable to factor usually happens when reading in data, e.g., with stringsasfactors = true, but this is useful when say, you've read data in. Feb 25, 2013is 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? Mar 29, 2021change your line where you are making the factor to make it an ordered factor, and specify the exact level names. Apr 13, 2017what is the most effective (ie efficient / appropriate) way to clean up a factor containing multiple levels that need to be collapsed?

That is, how to combine two or more factor levels into one.. Mar 4, 2010i have data frame with some numerical variables and some categorical factor variables. The order of levels for those factors is not the way i want them to be.

May 5, 2015filter factor levels in r using dplyr asked 10 years, 8 months ago modified 10 years, 8 months ago viewed 67k times Jun 11, 2014i'm doing this problem on a site that i found (project euler), and there is a question that involves finding the largest prime factor of a number. The loop will basically check each variable in the dataframe and tell me which variable is a factor.