Re: [Matplotlib-users] help me Velocity depth plot in matplotlib

[Damon M. <dam...@gm...>]

On Fri, Aug 10, 2012 at 02:09:39PM +0530, satish maurya wrote:
> Dear All,
> 
> I want to stairs plot (similar in matlab) matplotlib
> First i want for i data-set then multiple data-set super impose on that.
> I attach the figure it's showing velocity-depth stairs plots for
> superimpose (like hold on in matlab)
> large data-set.
> can anybody tell me how to plot that.
>

I'm not sure I understand what you're asking. Are you asking how to make
a stairplot, or are you asking how to make *multiple* plots on one set
of axes?

If your question is the former, matplotlib does not currently have a
stairplot implementation, but it wouldn't be hard to use the usual
plot() function to achieve the desired effect:

Before:

x = arange(0, 10, 1)
y = x * (10.0 - x)
plot(x, y)

After:

x = arange(0, 10, 1)
x_m = x - 0.5 # left-hand midpoints
x_p = x + 0.5 # right-hand midpoints
y = x * (10.0 - x)
x_all = dstack((x_m, x, x_p)).flatten()
y_all = dstack((y, y, y)).flatten()
plot(x_all, y_all)

If your question is the latter, you can toggle the hold state just by
calling

hold()

Hope this helps.

> 
> see the figure
> 
> Thank you
> 
> -- 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> *Satish Maurya*
> *Research Scholar*
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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