#+TITLE:  Your title
#+AUTHOR: Victor Martins Gomes
#+DATE:    2020-04-28 Tuesday.
#+LANGUAGE: en
# #+PROPERTY: header-args :eval never-export

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* Data visualization
Making plots of data.

** First we input the series/data.
#+begin_src python :results output :session *python* :exports both
import numpy as np
x=[14.0, 7.6, 11.2, 12.8, 12.5, 9.9, 14.9, 9.4, 16.9, 10.2, 14.9, 18.1, 7.3, 9.8, 10.9,12.2, 9.9, 2.9, 2.8, 15.4, 15.7, 9.7, 13.1, 13.2, 12.3, 11.7, 16.0, 12.4, 17.9, 12.2, 16.2, 18.7, 8.9, 11.9, 12.1, 14.6, 12.1, 4.7, 3.9, 16.9, 16.8, 11.3, 14.4, 15.7, 14.0, 13.6, 18.0, 13.6, 19.9, 13.7, 17.0, 20.5, 9.9, 12.5, 13.2, 16.1, 13.5, 6.3, 6.4, 17.6, 19.1, 12.8, 15.5, 16.3, 15.2, 14.6, 19.1, 14.4, 21.4, 15.1, 19.6, 21.7, 11.3, 15.0, 14.3, 16.8, 14.0, 6.8, 8.2, 19.9, 20.4, 14.6, 16.4, 18.7, 16.8, 15.8, 20.4, 15.8, 22.4, 16.2, 20.3, 23.4, 12.1, 15.5, 15.4, 18.4, 15.7, 10.2, 8.9, 21.0]
print(x)
#+end_src

#+RESULTS:
: [14.0, 7.6, 11.2, 12.8, 12.5, 9.9, 14.9, 9.4, 16.9, 10.2, 14.9, 18.1, 7.3, 9.8, 10.9, 12.2, 9.9, 2.9, 2.8, 15.4, 15.7, 9.7, 13.1, 13.2, 12.3, 11.7, 16.0, 12.4, 17.9, 12.2, 16.2, 18.7, 8.9, 11.9, 12.1, 14.6, 12.1, 4.7, 3.9, 16.9, 16.8, 11.3, 14.4, 15.7, 14.0, 13.6, 18.0, 13.6, 19.9, 13.7, 17.0, 20.5, 9.9, 12.5, 13.2, 16.1, 13.5, 6.3, 6.4, 17.6, 19.1, 12.8, 15.5, 16.3, 15.2, 14.6, 19.1, 14.4, 21.4, 15.1, 19.6, 21.7, 11.3, 15.0, 14.3, 16.8, 14.0, 6.8, 8.2, 19.9, 20.4, 14.6, 16.4, 18.7, 16.8, 15.8, 20.4, 15.8, 22.4, 16.2, 20.3, 23.4, 12.1, 15.5, 15.4, 18.4, 15.7, 10.2, 8.9, 21.0]

** Now we plot the series

#+begin_src python :results output file :var matplot_lib_filename="matplot_lib_filename.png" :exports both :session *python*
import matplotlib.pyplot as plt

plt.figure()
plt.plot(x,'b')
plt.grid(linestyle='dotted')
plt.axis('tight')
plt.xlim( 0,100 )
plt.ylim( 0,25 )
plt.title('Plotting series')

plt.savefig(matplot_lib_filename)
print(matplot_lib_filename)
#+end_src

#+RESULTS:
[[file:matplot_lib_filename.png]]

#+begin_src python :results output file :var matplot_lib_filename="matplot_lib_filename.png" :exports both :session *python*
plt.close('all')
#+end_src

#+RESULTS:
[[file:]]

** Now the histogram

#+begin_src python :results output file :var matplot_lib_filename="matplot_lib_hist.png" :exports both :session *python*

plt.figure()
plt.hist(x,color='b',histtype='bar',ec='black')
plt.grid(linestyle='dotted')
plt.axis('tight')
plt.xlim( 0,25 )
plt.ylim( 0,25 )
plt.title('Histogram series')

plt.savefig(matplot_lib_filename)
print(matplot_lib_filename)
#+end_src

#+RESULTS:
[[file:matplot_lib_hist.png]]