Thread: [Matplotlib-users] get_xlim of dates

Hi,

My X axis represents dates. When I used get_xlim(), I got something like
735461.0 and 735490.5. What are these values? How can I convert to python
date objects?

Many thanks,
Tom

Le 16/09/2014 17:31, Xiaobo Yang a écrit :
> My X axis represents dates. When I used get_xlim(), I got something 
> like 735461.0 and 735490.5. What are these values? How can I convert 
> to python date objects?

Please, read the documentation of datetime.

Your data are *ordinals*, numbers which pack the data: year, month, etc. 
into one number ; the same strategy is used in spreadsheets, e.g., Excel.

If r=r=735461, then

datetime.fromordinal(r) gives: datetime.datetime(2014, 8, 16, 0, 0), 
unless I am mistaken...

==
This is the first approximation ... the "proleptic Gregorian ordinals" 
are integers. You have floats, and this probably is converted into 
fractions of a day / hour, etc. Read also something about timestamps.

Regards.

Jerzy Karczmarczuk

On Sep 16, 2014, at 11:31 AM, Xiaobo Yang <xia...@gm...> wrote:

> Hi,
> 
> My X axis represents dates. When I used get_xlim(), I got something like 735461.0 and 735490.5. What are these values? How can I convert to python date objects?
> 
> Many thanks,
> Tom

See the matplotlib dates documentation at

http://matplotlib.org/api/dates_api.html

many thanks - was struggling to find out where's the document!

On 16 September 2014 17:20, Scott Lasley <sl...@sp...> wrote:

>
> On Sep 16, 2014, at 11:31 AM, Xiaobo Yang <xia...@gm...> wrote:
>
> > Hi,
> >
> > My X axis represents dates. When I used get_xlim(), I got something like
> 735461.0 and 735490.5. What are these values? How can I convert to python
> date objects?
> >
> > Many thanks,
> > Tom
>
> See the matplotlib dates documentation at
>
> http://matplotlib.org/api/dates_api.html
>
>