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I have the following data frame:
name1 name2
A B
B D
C C
D A
the columns "name1" and "name2" are treated as factors and therefore A, B, C, and D are treated as levels. However I want to somehow convert this data frame so that it become
name1 name2
"A" "B"
"B" "D"
"C" "C"
"D" "A"
In other words, convert it in a way that A, B, C, and D are treated as string.
how can i do that?
842
To convert factor levels into character then we can use as. character function by accessing the column of the data frame that contain factor values. For example, if we have a data frame df which contains a factor column named as Gender then this column can be converted into character column as as. character(df$Gender).
To convert all columns of the data frame into the character we use apply() function with as. character parameter. The lapply() function applies the given function to the provided data frame.
There are two steps for converting factor to numeric: Step 1: Convert the data vector into a factor. The factor() command is used to create and modify factors in R. Step 2: The factor is converted into a numeric vector using as. numeric().
Similarly the label for a factor lets you store text to represent a group. For a factor label you can enter any text up to a maximum of 60 characters. If the cells within the labels column are empty then this means that no labels are currently representing the groups for the factor.
This Example explains how to convert a single variable of a data frame from factor to character. First, we have to create some example data: We can use the sapply and the class functions to check the classes of all variables of our data frame: The first and third columns are factors; the second column is an integer.
Now, we can use the as.factor function to convert this character string to the factor class: Our updated vector is stored in the data object vec_updated. Again, we can use the class function to check the class of our updated vector: It’s a factor! We can also convert character variables (i.e. columns) of data frames to the factor type.
Example 3: Convert an Entire DataFrame to Strings Lastly, we can convert every column in a DataFrame to strings by using the following syntax: #convert every column to strings df = df.astype (str) #check data type of each column df.dtypes player object points object assists object dtype: object
you're looking for as.character, which you need to apply to each column of the data.frame
Assuming X is your data.frame
If fctr.cols are the names of your factor columns, then you can use:
X[, fctr.cols] <- sapply(X[, fctr.cols], as.character)
You can collect your factor columns using is.factor:
fctr.cols <- sapply(X, is.factor)
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