Well spotted, Hao Ye. That's a lesson for me to pay more attention to what I'm reading!
This list strives to be beginner friendly. However, we still ask that you PLEASE do read the posting guide http://www.R-project.org/
Trying to extract dates from a variable in a data frame and then make a new column with these dates. I’m using regular expression along str_extract command from package stringr.
I’m getting the error “Error in geno_time$time : $ operator is invalid for atomic vectors” when I used this command below on my dataframe.
I’m attaching example of my data and what I want to accomplish.
I appreciate your input and have a great weekend.
posting-guide.htmland provide commented, minimal, self-contained, reproducible code.