hi, i want to caculate PET and UTCI, but met the problem, please see the pictures.
my txt data as below:
date time Ta RH wind
31.07.2020 23:00 26.9 89 2
31.07.2020 20:00 25.8 91 2
31.07.2020 17:00 27.6 80 3
31.07.2020 14:00 27.6 84 2
31.07.2020 11:00 27.1 86 2
31.07.2020 08:00 27.8 82 2
31.07.2020 05:00 28.0 76 2
31.07.2020 02:00 28.7 76 3

how can i continue my caculation?

regards