Converting dates from the Persian calendar to Gregorian

 

-----Original Message-----
From: Amy Mikhail [mailto:amy.mikhail at googlemail.com] 
Sent: 7. januar 2009 14:33
To: BXC (Bendix Carstensen)
Subject: Re: [R-sig-Epi] Converting dates from the Persian calendar to Gregorian

Hi Bendix,

Thanks - had not heard of Emacs before although just looking at it

I'll post this to R-devel and see if there are any takers.

Best wishes,
Amy


On Wed, Jan 7, 2009 at 1:00 PM, BXC (Bendix Carstensen) <bxc at steno.dk> wrote:


	I already sent this request off to inquire with Peter Dalgard and Martyn Plummer from the R-core team, and got this back from Peter:
	

	> -----Original Message-----
	> From: Peter Dalgaard [mailto:P.Dalgaard at biostat.ku.dk]
	> Sent: 7. januar 2009 13:43
	> To: BXC (Bendix Carstensen)
	> Cc: pd at biostat.ku.dk; Martyn Plummer
	> Subject: Re: FW: [R-sig-Epi] Converting dates from the
	> Persian calendar to Gregorian
	>

	> Also notice that M-x calendar in Emacs does a lot of this stuff.
	>
	>
	> p o           calendar-print-other-dates
	> p m           calendar-print-mayan-date
	> p f           calendar-print-french-date
	> p i           calendar-print-islamic-date
	> p h           calendar-print-hebrew-date
	> p a           calendar-print-astro-day-number
	> p j           calendar-print-julian-date
	> p c           calendar-print-iso-date
	> p p           calendar-print-persian-date
	> p e           calendar-print-ethiopic-date
	> p k           calendar-print-coptic-date
	> p C           calendar-print-chinese-date
	> p d           calendar-print-day-of-year
	>

	
	Yes it might be a good idea to pose this to the R-devel list as a facility that should be included in R --- presumably with the same facilities as in emacs.
	

	Best regards,
	Bendix
	

	> -----Original Message-----

	> From: Amy Mikhail [mailto:amy.mikhail at googlemail.com]
	> Sent: 7. januar 2009 13:45
	> To: BXC (Bendix Carstensen)
	> Cc: r-sig-epi at stat.math.ethz.ch
	> Subject: Re: [R-sig-Epi] Converting dates from the Persian
	> calendar to Gregorian
	>
	> Hi Bendix,
	>
	> Many thanks - yes, I had already visited Homam's page.  I
	> have posted a message there asking if there is some way to
	> link his code / function to my MS Access database, but having
	> this as a function in R would be better.
	>
	> Any takers, who know both C and R?  Should I also post this
	> to the R devel list?
	>
	> Best wishes,
	> Amy
	>
	>
	>
	> On Wed, Jan 7, 2009 at 12:26 PM, BXC (Bendix Carstensen)
	> <bxc at steno.dk> wrote:
	>
	>
	>       Hi Amy,
	>       you probaly already have visited:
	>       http://www.codeproject.com/KB/cs/JalaliCalendar.aspx
	>       where the Iranian guy Homam Hosseini provides a
	> discussion of the conversion, and some C code to do it.
	>
	>       I am a C ignorant, but surely someone in the
	> R-community would be able to take this code (and in
	> collaboration with Homam) provide a function that converts
	> Iranian / Jalali dataes to and from the Gregorian Date class??
	>
	>       Best regards
	>       Bendix
	>
	>

	>       > -----Original Message-----
	>       > From: r-sig-epi-bounces at stat.math.ethz.ch
	>       > [mailto:r-sig-epi-bounces at stat.math.ethz.ch] On

	> Behalf Of Amy Mikhail

	>       > Sent: 7. januar 2009 12:40
	>       > To: r-sig-epi at stat.math.ethz.ch
	>       > Subject: [R-sig-Epi] Converting dates from the Persian
	>       > calendar to Gregorian
	>       >
	>       > Dear Epi list,
	>       >
	>       > This is not a strictly epidemiological question, but an issue
	>       > that anyone might face if presented with a dataset containing
	>       > dates in a non-gregorian format.
	>       >
	>       > I am currently developing a database (in MS Access) for a
	>       > public health study, the results of which I intend to analyse
	>       > in R.  I have a small problem, in that the date each patient
	>       > visits the clinic will be entered into the database in the
	>       > Persian  / Jalali calendar format - e.g. today's
	>       > date in the Persian calendar is 18.10.1387.   For the
	>       > analysis however I
	>       > need these dates to be converted to Gregorian, so that I can
	>       > have months on the x axis of plots, etc.
	>       >
	>       > Does anyone know of a function / some code already written
	>       > that could do this conversion in R?  It is much too complex
	>       > for me to figure out (since the Persian new year starts on
	>       > 21st March, and although there are also 12 months they have
	>       > different lengths to gregorian months).  I'm guessing it
	>       > would require loops and such but this is beyond my current
	>       > level of R knowledge.
	>       >
	>       > I have found some online tools that do the conversion of
	>       > individual dates, but there seems to be nothing out there
	>       > that would convert a whole dataset's worth of dates.
	>       >
	>       > Any suggestions much appreciated,
	>       > 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.mikhail at googlemail.com
	>       > Email (UK): Amy.Mikhail at lshtm.ac.uk
	>       > Tel (Afg): +93 (0)706 126627
	>       > Tel (UK): +44 (0)781 4176107
	>       >

	>

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	>       >
	>       > _______________________________________________
	>       > R-sig-Epi at stat.math.ethz.ch mailing list
	>       > https://stat.ethz.ch/mailman/listinfo/r-sig-epi
	>       >

	>
	>
	>
	>
	> --
	> 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.mikhail at googlemail.com
	> Email (UK): Amy.Mikhail at lshtm.ac.uk
	> Tel (Afg): +93 (0)706 126627
	> Tel (UK): +44 (0)781 4176107
	>
	> 

--
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.mikhail at googlemail.com
Email (UK): Amy.Mikhail at lshtm.ac.uk
Tel (Afg): +93 (0)706 126627
Tel (UK): +44 (0)781 4176107