$ operator is invalid for atomic vectors什么意思
时间: 2024-05-23 19:16:00 浏览: 7
"$" operator is used to extract elements from a list or a data frame in R programming language. The error message "operator is invalid for atomic vectors" means that the "$" operator cannot be used on a non-list or non-data frame object, such as a vector. This error message usually occurs when you try to extract an element using the "$" operator from a vector instead of a list or data frame.