matplotlib-users Mailing List for matplotlib

> I have a small matplotlib app I wrote to plot columns of a CSV files.
> The X axis is almost always time. Once displayed, I will often zoom in
> on a small patch of a plot.  I'm currently selecting the strftime
> format based on the original time range of the input.  As I zoom in,
> however, that doesn't work so well....

> but when I use it in the obvious way, all I get is the current year
> for all tick labels, despite the fact that the scaled attribute of the
> formatter has keys which are much smaller than a year.

I kind of got this working.  I had to associate the locator with the X
axis and call it's autoscale() method before calling plot.show().  Now
I get %H:%M:%S formatting for everything, even when I'm zoomed way out
on a data set containing two-days worth of time series data.  I
suppose I can fiddle with the AutoDateFormatter's scaled attribute,
but the default looks like it ought to work.  Any thoughts on what I'm
(still) missing?

The locator/formatter code looks like this:

    locator = matplotlib.dates.AutoDateLocator()
    formatter = matplotlib.dates.AutoDateFormatter(locator)
    ...
    left_plot = figure.add_subplot(111)
    left_plot.set_title(title)
    left_plot.set_axisbelow(True)
    left_plot.yaxis.set_major_formatter(pylab.FormatStrFormatter('%g'))
    ...
    locator.set_axis(left_plot.xaxis)
    left_plot.xaxis.set_major_formatter(formatter)
    locator.autoscale()
    pylab.show()

This works fine except for the lack of dynamic scaling and apparently
incorrect choice of labels on plots over large time scales.

Skip

Hi Bill,

Made an important move, after a log jam for quite some.

I spent some time exploring *TA-LIB for python*. Today I tested plotting
Bollinger bands, SMA, WMA etc on my 5 min. intraday hist. chart. It was not
bad.

The most important one, *Hull Moving Average (HMA)* which is back bone to my
system needs to be written. I will start working on that one, now I don't
need to worry any more about other aspects. :)

Thanks once again to both of you.

Regards

Suresh





--
View this message in context: http://matplotlib.1069221.n5.nabble.com/To-add-Bollinger-Bands-in-finance-work2-py-tp41310p41454.html
Sent from the matplotlib - users mailing list archive at Nabble.com.

http://scitools.org.uk/iris/docs/v1.0/examples/graphics/hovmoller.html

On Thu, Jul 11, 2013 at 5:40 AM, Sudheer Joseph
<sud...@ya...> wrote:
> Dear All,
>              Is there a straight forward way to get
> Hovemuller diagram or longitude/latitude vs time plot using matplotlib.
> If possible please send me some examples if any one know it existing in
> web
>
> with best regards,
> Sudheer
>
> ***************************************************************
> Sudheer Joseph
> Indian National Centre for Ocean Information Services
> Ministry of Earth Sciences, Govt. of India
> POST BOX NO: 21, IDA Jeedeemetla P.O.
> Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
> Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
> Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
> E-mail:sjo...@gm...;sud...@ya...
> Web- http://oppamthadathil.tripod.com
> ***************************************************************
>
> ------------------------------------------------------------------------------
> See everything from the browser to the database with AppDynamics
> Get end-to-end visibility with application monitoring from AppDynamics
> Isolate bottlenecks and diagnose root cause in seconds.
> Start your free trial of AppDynamics Pro today!
> http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users



-- 
Dr. Richard P. Signell   (508) 457-2229
USGS, 384 Woods Hole Rd.
Woods Hole, MA 02543-1598

Dear All,
             Is there a straight forward way to get 
Hovemuller diagram or longitude/latitude vs time plot using matplotlib. 
If possible please send me some examples if any one know it existing in 
web 

with best regards,
Sudheer
 
***************************************************************
Sudheer Joseph 
Indian National Centre for Ocean Information Services
Ministry of Earth Sciences, Govt. of India
POST BOX NO: 21, IDA Jeedeemetla P.O.
Via Pragathi Nagar,Kukatpally, Hyderabad; Pin:5000 55
Tel:+91-40-23886047(O),Fax:+91-40-23895011(O),
Tel:+91-40-23044600(R),Tel:+91-40-9440832534(Mobile)
E-mail:sjo...@gm...;sud...@ya...
Web- http://oppamthadathil.tripod.com
***************************************************************