by Suf | Jul 26, 2022 | Programming, R, Tips
This error occurs when you try to use a list to subset a data frame. You can solve this error by using the c function to subset the data frame based on a vector. For example, df_subset <- df[c(“x”, “z”)] df_subset This tutorial will go...
by Suf | Jul 25, 2022 | Programming, R, Tips
This error occurs if you try to create a variable with a name beginning with a number. You can solve this error by ensuring the variable starts with a letter or a dot. You can see the documentation for syntactically valid names by typing the following command:...
by Suf | Jul 24, 2022 | Programming, R, Tips
You can find the column name with the largest value across all rows using the colnames() function together with the apply function. For example, df$largest_col <-colnames(df)[apply(df, 1, which.max)] This tutorial will go through how to perform this task with code...
by Suf | Jul 21, 2022 | Programming, R, Tips
This error occurs if you try to perform a mathematic operation on a character vector. You can solve this error by converting the characters to numeric values using the as.numeric() function. For example, x <- c(“2”, “3”, “4”,...
by Suf | Jul 20, 2022 | Programming, R, Tips
This error occurs when you try to fit a regression model and one or more of the predictor variables are either factor or character and have only one unique value. You can solve this error by using the lapply() function to display each of the unique values for each...
by Suf | Jul 20, 2022 | Programming, R, Tips
This error occurs when you try to convert a number to a date without providing an origin date. You can solve this error by providing a date as an origin argument to the as.Date function. For example, as.Date(34291, origin = “1900-01-01″) This tutorial will...
