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 …
Synology NAS: Trying to login after 2-factor authentication results in ...
Oct 6, 2021 · Synology NAS: Trying to login after 2-factor authentication results in "wrong verification code. please try again" Asked 4 years, 3 months ago Modified 14 days ago Viewed 20k times
Convert data.frame column format from character to factor
Dec 6, 2018 · The 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 …
when to use factor () when plotting with ggplot in R?
Feb 25, 2013 · 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 …
What is the significance of load factor in HashMap?
Feb 22, 2018 · A load factor=1 hashmap with number of entries=capacity will statistically have significant amount of collisions (=when multiple keys are producing the same hash). When collision occurs the …
Cleaning up factor levels (collapsing multiple levels/labels)
Apr 13, 2017 · What 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. …
Reorder levels of a factor without changing order of values
Mar 4, 2010 · I 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. numbers <- 1:4 letters <- …
How to force R to use a specified factor level as reference in a ...
You should do the data processing step outside of the model formula/fitting. 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 …
efficient ways of finding the largest prime factor of a number
Jun 11, 2014 · I'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. My solution fails at really large numbers so I was
loops - R check if a variable is a factor - Stack Overflow
Aug 8, 2014 · I am trying to write a loop which can apply to a dataframe. The loop will basically check each variable in the dataframe and tell me which variable is a factor. An example: test1<-c("red","re...