I have hourly weather data from 42 stations for 2 months. The data set is an irregular series (See the HR/hour column). I want to add the missing rows to make it a regular series.
I am new to R, so I don't have much knowledge to complete the task.
The error indicates that your RAM has been exhausted.
The first thing to try is to run from a clean session and only to load the objects you require. Memory can get clogged up if you have been running many things in the same session.
You could also close any other applications which are consuming large amounts of RAM.