# [Numpy-discussion] Producing a Histogram When Bins Are Known

Wayne Watson sierra_mtnview@sbcglobal....
Fri Nov 27 16:47:46 CST 2009

I tried this and it put ranges on y from 0 to 0.45 and x from 5 to 50.

import numpy as np
import pylab

v = np.array([20, 15,10,30, 50, 30, 20, 25, 10])
#Plot a normalized histogram
print np.linspace(0,50,10)
pylab.hist(v, normed=1, bins=np.linspace(0,9,10), range=(0,100))
pylab.show()

I  added the two imports. I got a fig error on the first line.
import pylab
import numpy

Shouldn't there by a pylab.Show in there?

pylab.title(r'\Large  BCG NO radio distribution $\rm{TITLE}$')
n, bins, patches = pylab.hist(values, bins=math.sqrt(len(values)),
range=(numpy.mean(values)-3*scientificstat.standardDeviation(values),numpy.mean(values)+3*scientificstat.standardDeviation(values)),
normed=1, facecolor='y', alpha=0.5)
ax.set_xlabel(r'\Large$\rm{values}$')
ax.set_ylabel(r'\Large Delatavalue/Value')

gausx=numpy.arange(numpy.mean(Value)-3*scientificstat.standardDeviation(Value),numpy.mean(Value)+3*scientificstat.standardDeviation(bpty_plt),0.1)
gaus=normpdf(gausx,numpy.mean(Value),scientificstat.standardDeviation(Value))
pylab.plot(gausx,gaus, color='red', lw=2)
ax.set_xlim(-1.5, 1.5)
ax.grid(True)

Sebastian wrote:
> Did you try using the parameter range?
> I do something like this.
> regards
>
>     pylab.title(r'\Large  BCG NO radio distribution $\rm{TITLE}$')
>     n, bins, patches = pylab.hist(values, bins=math.sqrt(len(values)),
>     range=(numpy.mean(values)-3*scientificstat.standardDeviation(values),numpy.mean(values)+3*scientificstat.standardDeviation(values)),
>     normed=1, facecolor='y', alpha=0.5)
>     ax.set_xlabel(r'\Large$\rm{values}$')
>     ax.set_ylabel(r'\Large Delatavalue/Value')
>
>     gausx=numpy.arange(numpy.mean(Value)-3*scientificstat.standardDeviation(Value),numpy.mean(Value)+3*scientificstat.standardDeviation(bpty_plt),0.1)
>     gaus=normpdf(gausx,numpy.mean(Value),scientificstat.standardDeviation(Value))
>     pylab.plot(gausx,gaus, color='red', lw=2)
>     ax.set_xlim(-1.5, 1.5)
>     ax.grid(True)
>
>
> On Fri, Nov 27, 2009 at 4:38 PM, Christopher Barker
> <Chris.Barker@noaa.gov <mailto:Chris.Barker@noaa.gov>> wrote:
>
>     josef.pktd@gmail.com <mailto:josef.pktd@gmail.com> wrote:
>     > On Fri, Nov 27, 2009 at 12:57 PM, Skipper Seabold
>     <jsseabold@gmail.com <mailto:jsseabold@gmail.com>> wrote:
>
>     >>  This kind of info might be useful to other newcomers
>     >> somewhere...  <http://www.scipy.org/History_of_SciPy>?  Thoughts on
>     >> posting this on the wiki here?
>     >
>     > I also agree. It will improve with the newly redesigned website
>     for scipy.org <http://scipy.org>
>     > However, I cannot find the link right now for the development
>     version of
>     > the new website.
>
>     Feel free to crib whatever you want from my post for that -- or
>     suggest
>     a place for me to put it, and I'll do it. I'm just not sure where it
>     should go at this point.
>
>     -Chris
>
>
>     --
>     Christopher Barker, Ph.D.
>     Oceanographer
>
>     Emergency Response Division
>     NOAA/NOS/OR&R            (206) 526-6959   voice
>     7600 Sand Point Way NE   (206) 526-6329   fax
>     Seattle, WA  98115       (206) 526-6317   main reception
>
>     Chris.Barker@noaa.gov <mailto:Chris.Barker@noaa.gov>
>     _______________________________________________
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>     NumPy-Discussion@scipy.org <mailto:NumPy-Discussion@scipy.org>
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>
>
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