by Suf | May 2, 2022 | Programming, R, Tips
In R, if you are missing mathematical operators when performing mathematical operations, you can raise the error: attempt to apply non-function. This error occurs because the R interpreter expects a function whenever you place parentheses () after a variable name. You...
by Suf | May 2, 2022 | Programming, R, Tips
If you try to subset a data frame without using a comma, you will raise the error: undefined columns selected. The syntax for subsetting a data frame is: dataframe[rows_to_subset, columns_to_subset] To solve this error, you need to use a comma after the rows you want...
by Suf | May 2, 2022 | Programming, R, Tips
In R, if the evaluation of a condition in an if or while statement results in NA, you will raise the error: missing value where TRUE/FALSE needed. You can solve this error by using is.na(x) instead of x == NA. This tutorial will go through the error in detail and how...
by Suf | May 2, 2022 | Programming, R, Tips
If you try to refer to an object that has not been defined in an R code block or before it, you will raise the error object not found. The R interpreter could not find the variable mentioned in the error message. You can check if a variable exists using ls or exists,...
by Suf | May 2, 2022 | Programming, R, Tips
This error occurs when you try to read a CSV file into R using read.table() and do not specify the correct separator. You can solve this error by specifying the sep argument for the read.table() function call. For example, df <- read.table(“pizzas.csv”,...
