On 1/6/21 9:55 AM, Martin Schöön wrote: > Hello, > > I have had some Python fun with COVID-19 data. I have done > some curve fitting and to make that easier I have transformed > date to day of year. Come end of 2020 and beginning of 2021 > and this idea falls on its face. > > There must be a better way of doing this. > > I am using Pandas for reading and manipulating data coming > from a csv file. Scipy, numpy and matplotlib are used > for the curve fitting and plotting.
An important question is how the day/date is presented in these graphs. The Julian date format used to be more common in Data Processing. Dates are expressed as yy-ddd. Thus, prepending "20" or "21" to existing day-of-year numbers, would separate and sequence correctly. (NB carefully consider str cf int) Another solution is to use a Unix Timestamp for each day. In both cases, arithmetic comparison-logic is possible, and library routines exist to format various reporting-formats. -- Regards =dn -- https://mail.python.org/mailman/listinfo/python-list
