matplotlib

On Sat, Jul 14, 2012 at 12:49:29PM +0100, Mark Lawrence wrote:
> Sorry if I've missed this in the docs but is it possible to directly 
> plot a histogram with a date x axis or do I have to roll my own?  This 

I'm assuming you have weight data AND date data. That is, a list of
dates and associated with each date a value of your weight for that
date.

If you have the dates, you could check out:

http://stackoverflow.com/questions/5498510/creating-graph-with-date-and-time-in-axis-labels-with-matplotlib

and

http://matplotlib.sourceforge.net/users/recipes.html#fixing-common-date-annoyances

> is critical as I'm on a diet and trying to plot my weight loss against 
> date :)
> 

Good luck :)

> -- 
> Cheers.
> 
> Mark Lawrence.
> 

-- 
Damon McDougall
http://damon-is-a-geek.com
B2.39
Mathematics Institute
University of Warwick
Coventry
West Midlands
CV4 7AL
United Kingdom

On 14/07/2012 13:05, Damon McDougall wrote:
> On Sat, Jul 14, 2012 at 12:49:29PM +0100, Mark Lawrence wrote:
>> Sorry if I've missed this in the docs but is it possible to directly
>> plot a histogram with a date x axis or do I have to roll my own?  This
>
> I'm assuming you have weight data AND date data. That is, a list of
> dates and associated with each date a value of your weight for that
> date.

Correct.

>
> If you have the dates, you could check out:
>
> http://stackoverflow.com/questions/5498510/creating-graph-with-date-and-time-in-axis-labels-with-matplotlib
>
> and
>
> http://matplotlib.sourceforge.net/users/recipes.html#fixing-common-date-annoyances

Will do.

>
>> is critical as I'm on a diet and trying to plot my weight loss against
>> date :)
>>
>
> Good luck :)

Thanks.

>
>> --
>> Cheers.
>>
>> Mark Lawrence.
>>
>

Finally thanks for the quick response.

-- 
Cheers.

Mark Lawrence.

On Jul 14, 2012, at 7:49 AM, Mark Lawrence wrote:

> Sorry if I've missed this in the docs but is it possible to directly 
> plot a histogram with a date x axis or do I have to roll my own?  This 
> is critical as I'm on a diet and trying to plot my weight loss against 
> date :)
> 
> -- 
> Cheers.
> 
> Mark Lawrence.

Are you sure you want a histogram - weight vs date sounds more like a simple bar graph (which matplotlib does trivially). 

-Bill

On 14/07/2012 13:41, William R. Wing (Bill Wing) wrote:
> On Jul 14, 2012, at 7:49 AM, Mark Lawrence wrote:
>
>> Sorry if I've missed this in the docs but is it possible to directly
>> plot a histogram with a date x axis or do I have to roll my own?  This
>> is critical as I'm on a diet and trying to plot my weight loss against
>> date :)
>>
>> --
>> Cheers.
>>
>> Mark Lawrence.
>
> Are you sure you want a histogram - weight vs date sounds more like a simple bar graph (which matplotlib does trivially).
>
> -Bill
>
> ------------------------------------------------------------------------------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and
> threat landscape has changed and how IT managers can respond. Discussions
> will include endpoint security, mobile security and the latest in malware
> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
>

You are correct, why did I say histogram when I've been looking at my 
own code that plots bars?  Just shows that a beer free diet is no good 
for you :)  Let's try again, is it possible to directly
plot a bar chart with a date x axis or do I have to roll my own?

-- 
Cheers.

Mark Lawrence.

On Sat, Jul 14, 2012 at 01:57:13PM +0100, Mark Lawrence wrote:
> On 14/07/2012 13:41, William R. Wing (Bill Wing) wrote:
> > On Jul 14, 2012, at 7:49 AM, Mark Lawrence wrote:
> >
> >> Sorry if I've missed this in the docs but is it possible to directly
> >> plot a histogram with a date x axis or do I have to roll my own?  This
> >> is critical as I'm on a diet and trying to plot my weight loss against
> >> date :)
> >>
> >> --
> >> Cheers.
> >>
> >> Mark Lawrence.
> >
> > Are you sure you want a histogram - weight vs date sounds more like a simple bar graph (which matplotlib does trivially).
> >
> > -Bill
> >
> > ------------------------------------------------------------------------------
> > Live Security Virtual Conference
> > Exclusive live event will cover all the ways today's security and
> > threat landscape has changed and how IT managers can respond. Discussions
> > will include endpoint security, mobile security and the latest in malware
> > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
> >
> 
> You are correct, why did I say histogram when I've been looking at my 
> own code that plots bars?  Just shows that a beer free diet is no good 
> for you :)  Let's try again, is it possible to directly
> plot a bar chart with a date x axis or do I have to roll my own?
> 
> -- 
> Cheers.
> 
> Mark Lawrence.
> 

Everything I said was not at all specific to histograms :)

-- 
Damon McDougall
http://damon-is-a-geek.com
B2.39
Mathematics Institute
University of Warwick
Coventry
West Midlands
CV4 7AL
United Kingdom

On Jul 14, 2012, at 8:57 AM, Mark Lawrence wrote:

> On 14/07/2012 13:41, William R. Wing (Bill Wing) wrote:
>> On Jul 14, 2012, at 7:49 AM, Mark Lawrence wrote:
>> 
>>> Sorry if I've missed this in the docs but is it possible to directly
>>> plot a histogram with a date x axis or do I have to roll my own?  This
>>> is critical as I'm on a diet and trying to plot my weight loss against
>>> date :)
>>> 
>>> --
>>> Cheers.
>>> 
>>> Mark Lawrence.
>> 
>> Are you sure you want a histogram - weight vs date sounds more like a simple bar graph (which matplotlib does trivially).
>> 
>> -Bill
> 

[byte]

> You are correct, why did I say histogram when I've been looking at my 
> own code that plots bars?  Just shows that a beer free diet is no good 
> for you :)  Let's try again, is it possible to directly
> plot a bar chart with a date x axis or do I have to roll my own?
> 
> -- 
> Cheers.
> 
> Mark Lawrence.
> 

A good start on time-series X-axis plotting is here:  http://blog.mafr.de/2012/03/11/time-series-data-with-matplotlib/

And the sorceforge matplotlib gallery has several versions of bar charts (with code) here:  http://matplotlib.sourceforge.net/gallery.html

-Bill