Error in subset.default(df, select = -c(which(colSums(is.na(df)) == nrow(df)))) : argument "subset" is missing, with no default

This error message suggests that the function subset() is being called without the required argument "subset". In addition, the select argument seems to be incorrect as well.

To fix this error, the subset argument should be specified to indicate which rows to keep in the data frame. The select argument can be used to indicate which columns to keep. Here's an example:

# create a sample data frame with missing values
df <- data.frame(a = c(1, 2, NA, 4), b = c(5, NA, 7, 8), c = c(NA, 10, 11, 12))

# remove columns with all missing values
df <- subset(df, select = -which(colSums(is.na(df)) == nrow(df)))

# remove rows with any missing values
df <- subset(df, subset = complete.cases(df))

In this example, we first remove columns with all missing values using the colSums() function and the which() function to identify the indices of the columns to remove. We then use the subset() function to remove any rows with missing values by specifying the subset argument as complete.cases(df).