Returning to the numpy and matplotlib articles, this time a plot of the water vapor calculation between -100 and 100 degrees Celsius will be shown.

The vapor equation is the following:

Where es is in pascal and T in degrees Celsius.

The code to generate the plot is shown below:

#!/usr/bin/env python3


# -*- coding: utf-8 -*-


#Se importa numpy como np


import numpy as np


#Se importa xlabel, ylabel, plot y show de pylab


from pylab import xlabel,ylabel, plot, show


#Se define el rango de la temperatura, de -100 a 100 con


#incrementos de 50.


T = np.linspace(-100,100,50)


#Se realiza el cálculo de la presión pasandole el arreglo de valores de


#la temperatura


es = 611*np.exp(17.27*T/(237.3+T))


#Se crea la gráfica


plot(T,es)


#Se define las etiquetas de los ejes X y Y.


xlabel('T (Grados centigrados)')


ylabel(u'Presión de vapor (Pa)')


#Se muestra la gráfica

show()

The plot is shown below:

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