Re: [Matplotlib-users] Translating ticks a la MultipleLocator ?

[Iyer <mas...@ya...>]

I apologize if I haven't been sufficiently clear.

While your suggestion picks out the samples from the
sample set, and discards other samples - what I was
looking at --

when I plot a sample set, of say - 1000 points, the
xticks shows up as 0 to 1000 points on the plot.

I was wondering if there could be a way to translate
the xtick display to that of seconds, if the sampling
frequency is 250 Hz, the plot would still display the
original data set, but with different xticks -- for
e.g. it would display xticks as 0 to 4 seconds rather
than 0 to 1000 points.. hence is there a good way to
"translate ticks" ?

-iyer


--- John Hunter <jd...@gm...> wrote:

> On 4/10/07, Iyer <mas...@ya...> wrote:
> > I'd like to avoid the pylab interface...
> > linspace is good.
> 
> from matplotlib.mlab import linspace
> 
> But linspace may not be what you want.  Probably
> better:
> 
> In [1]: Fs = 4.  # sampling at 4Hz
> 
> In [2]: dt = 1./Fs
> 
> In [3]: import numpy
> 
> In [4]: ind = numpy.arange(1000.)  # the sample
> number
> 
> In [5]: t = ind*dt   # the sample times
> 
> In [6]: t[0]
> Out[6]: 0.0
> 
> In [7]: t[1]
> Out[7]: 0.25
> 
> 
> linspace gives a slightly different answer, because
> it includes the
> endpoint.  Sometimes this is what you want,
> sometimes not.
> 



       
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