by Suf | May 2, 2022 | Programming, R, Tips
If you try to merge two data frames by a column only present in one of the data frames you will raise the error fix.by(by.y, y): ‘by’ must specify a uniquely valid column. You can solve this error by either using a column name present in both data frames...
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”,...
by Suf | May 1, 2022 | Programming, R, Tips
If you try to access a column or row that does not exist, you will raise the error Subscript out of bounds. You can use nrows(matrix) to find the number of rows of a matrix, ncol(matrix) to find the number of columns in a matrix and dim(matrix) to find the number of...
