r-factor
counting unique factors in r
I would like to know the number of unique dams which gave birth on each of the birth dates recorded. My data frame is similar to this one:[详细]
2023-03-02 18:18 分类：问答Confusion between factor levels and factor labels
There seems to be a difference between levels and labels of a factor in R. Up to now, I always thought that levels were the \'real\' name of factor levels, and labels were the names used for output (s[详细]
2023-03-02 17:48 分类：问答Factors in R: more than an annoyance?
One of the basic data types in R is factors. In my experience factors are basically a pain and I never use them. I always convert to characters. I feel oddly like I开发者_StackOverflow\'m missing some[详细]
2023-01-11 01:27 分类：问答Why does as.factor return a character when used inside apply?
I want to convert variables into factors using apply(): a <- data.frame(x1 = rnorm(100), x2 = sample(c(\"a\",\"b\"), 100, replace = T),[详细]
2022-12-22 15:15 分类：问答Unseen factor levels when appending new records with unseen string values to a dataframe, cause Warning and result in NA
I have a dataframe (14.5开发者_StackOverflow中文版K rows by 15 columns) containing billing data from 2001 to 2007.[详细]
2022-12-10 02:25 分类：问答
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