Re: [Matplotlib-users] A Simple Example of histogram Using Range?

[Johan G. <joh...@gm...>]

Wayne Watson skrev:
> Anyway, where, folder, does your program write the files? I'm not
> familiar with figure, but apparently using it produces some "canvas"
> that plt.hist places it's output on. One can than save fig to a file.
> What happens if I don't use figure? I just put a copy of the line
> plt.hist([1, 2, 3, 4, 5], range=(0, 20)) after import. When I execute
> the program, I don't see a graphic appear. So doesn't matplotlib produce
> graphic output aside from use of figure?
> 

My intuition is exactly like that.

After importing matplotlib.pyplt as plt, plt.figure creates an object 
that acts as canvas, and then I plot various things (hist, is one 
example), and when I am satisfied, I plt.savefig(path) or plt.show() the 
figure. The figures are saved in the directory where the script is run 
(its cwd, or current working directory, on linux).

I have also used hist without having a figure, but that was because I 
wanted the histogram data, i.e., the numbers of data points in the 
different bins. That script used plt.hist to generate such data, and 
later (after running fig = plt.figure) used plt.plot to plot parts of 
the data in different ways.

By the way, matplotlib.pyplot is one way of using matplotlib. There is 
also the "object oriented interface", which I have never used.





/ johan