I have an R code that reads in weather station data from around the world, and then calculates the trend for each station.

https://github.com/sjhalayka/crutem5_reader_R​​

It finds that the mean trend is 0.163 +/- 0.184 degrees per decade. Because the trend is positive, there is global warming.

If I uncomment the line shown in the next link, the code fails at some point. It's driving me nuts.

https://github.com/sjhalayka/crutem5_reader_R/blob/28898497185fba4cdd0ac1a2f4935a134af7ea53/array.r#L87​

Anyone know why?