Dear list, I will shortly have some data that contains numeric dates in the Persian / Jalali calendar format, which I would like to convert to gregorian. At the moment there doesn't seem to be a function for this in R, but it would be great if someone could come up with same - I would attempt it but the algorithm is very complex and this is also way beyond my fairly rudimentary knowledge of R.
There is an informative article about how this can be done in C by Homam Hosseini here: http://www.codeproject.com/KB/cs/JalaliCalendar.aspx and a different attempt here: http://www.projectpluto.com/calendar.htm#jalali ... and several other examples (mostly in C I think) can be found by googling Persian Jalali calendar. Aside from being written in C, the other problem with all the code snippets I found is that they are only for converting single dates - whereas I would like to convert an entire column of dates within a data.frame. To do this I would need to be able to first set the date class of my date column as Persian/Jalali and then have a function to convert these dates to gregorian. I originally posted my question to the R-SIG-epi list (on the off-chance that this might be a common problem and someone else had already written code for it); Bendix Carstensen has suggested that someone with both C and R knowledge might be able to develop a function to do this for R, perhaps in consultation with Homam Hosseini if converting his code to R or using his approach would be a helpful starting point. Any takers? With best wishes, Amy -- Amy Mikhail Program Manager, ACTc Afghanistan Malaria Project London School of Hygiene & Tropical Medicine HPRO, Charahi-e-Shahid, Shar-e-Naw, Kabul, Afghanistan Email (Afg): amy.mikh...@googlemail.com Email (UK): amy.mikh...@lshtm.ac.uk Tel (Afg): +93 (0)706 126627 Tel (UK): +44 (0)781 4176107 [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
