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...
by Suf | Jul 17, 2022 | Programming, R, Tips
This error occurs when you attempt to fit a model and two or more predictor variables are perfectly correlated. You can solve this error by using the cor() function to identify the variables with a perfect correlation and drop one of the variables from the model. This...
by Suf | Jul 16, 2022 | Programming, R, Tips
This error occurs if you try to perform a logical comparison in an if-statement with a zero-length variable. This error can happen if you define a variable with zero length or if you attempt to access a column of a data frame that does not exist. You can solve the...
