by Suf | Sep 18, 2024 | Programming, R, Tips

Introduction When working with R, you may encounter the error message:Error: invalid (NULL) left side of assignment. This error typically occurs when you mistakenly assign a value to a NULL object or when trying to modify a NULL object inappropriately. In this post,...
by Suf | Sep 17, 2024 | Programming, R, Tips

When working with the ggplot2 package in R, a common error you might encounter is: Error: ggplot2 doesn’t know how to deal with data of class matrix This error typically arises when you attempt to pass a matrix as the data input to ggplot2, which expects a data...
by Suf | Sep 17, 2024 | Programming, R, Tips

When working with R, the colMeans function is commonly used to calculate the mean of each column in a dataset. However, you might encounter the error: Error in colMeans(x, na.rm = TRUE) : ‘x’ must be numeric This error occurs when non-numeric data is...
by Suf | Sep 17, 2024 | Programming, R, Tips

When working with the randomForest package in R, you might encounter the error: Error in randomForest.default : NA not permitted in predictors This error occurs when the dataset being passed to the randomForest function contains NA, NaN, or Inf values, which are not...
by Suf | Sep 17, 2024 | Programming, R, Tips

When working with mixed-effects models in R, particularly with functions like lmer() from the lme4 package, you may encounter the following error: Error: number of levels of each grouping factor must be < number of observations (problems: group) This error occurs...
by Suf | Sep 16, 2024 | Programming, R, Tips

Introduction When working with Generalized Linear Models (GLM) in R, you may encounter the warning message: Warning: glm.fit: algorithm did not converge This warning typically arises when the model-fitting process fails to find optimal parameters after the maximum...