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Re: Convert MJD date range to number of days elapsed in IDL [message #93663 is a reply to message #93661]

Mon, 26 September 2016 06:54

Markus Schmassmann
Messages: 129
Registered: April 2016

Senior Member

On 09/25/2016 09:53 PM, cdav1601@terpmail.umd.edu wrote:
> I'm trying to figure out if there's some way I can take a range of
> MJD values and convert them into number of days elapsed over that
> range so I can normalize a plot of two supernova and their absolute
> magnitudes over time in IDL. Is there a simple conversion for this
> I'm not seeing or do I need to tediously convert every value to
> determine the number of days to use for my x-axis?
>
> Note: I do not wish to convert to the date, but the actually number
> of days elapsed as to normalize my two plots for comparison.
jd=julday(month,day,year)
days_elapsed=jd-jd[0]

month, day & year are arrays

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[Message index]

		Convert MJD date range to number of days elapsed in IDL By: cdav1601 on Sun, 25 September 2016 12:53
		Re: Convert MJD date range to number of days elapsed in IDL By: wlandsman on Mon, 26 September 2016 06:46
		Re: Convert MJD date range to number of days elapsed in IDL By: Markus Schmassmann on Mon, 26 September 2016 06:54

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