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This error occurs if you try to convert the elements of a list to numeric without converting the list to a vector using unlist(). You can solve this error by using the unlist() function before calling the numeric() function, for example, num <-...

This error occurs when you attempt to subscript a data frame that contains NA values. You can solve this error by excluding the NA values during the subscript operation, for example: data[data$col1<0 & !is.na(data$col1),]$col2 This tutorial will go through the...

This error occurs you try to set limits on the y-axis using scale_y_continuous() and the y variable is not numeric. This error can happen if you use character or factor type for the y variable in your data. You can solve this error by using numeric values instead of...

This error occurs if you use a numeric variable for the fill, color, and shape aesthetics in ggplot when it expects a factor variable. You can solve this error by using a factor class variable as the grouping variable. You can convert numeric values to factor using...

If you try to aggregate a data frame and do not explicitly define the column to aggregate by, you will raise the error: aggregate.data.frame(as.data.frame(x), ...): arguments must have same length. This error typically occurs if you use quotation marks to specify the...

This error occurs when you try to specify the fill colours when using ggplot2, but the number of colours is not 1 or different from the total number of plots to fill. To solve this error you can either specify one fill colour argument or ensure the total number of...

This error occurs when trying to fit a linear regression model in R using the lm() function but either the predictor or response variables contain Not a Number (NaN) or infinity (Inf) values. You can solve this error by replacing the NaN and Inf values with NA values,...

If you are using the ggplot2 package to visualize data and forget to use a plus sign in the code, you will encounter the error: cannot add ggproto plots together. This tutorial will go through how to solve the error with code examples. Table of...

This error occurs if you put the else statement on a new line after an if statement. R interprets the if statement as complete and does not expect an else. You can solve this error by enclosing the entire if/else statement in braces/curly brackets {} or put the else...

If you try to use the predict() function and the column names in the test data frame do not match those in the data frame used to fit the model, you will raise the error in eval(predvars, data, env): object 'x' not found. The 'x' will be the column name that does not...