How to change the Y axis range of a matplotlib graph?

Question

I am writing a code to get a graph:

import pandas as pd
import matplotlib.pyplot as plt
#importing the excel sheet with elements, mass and atomic number
x=pd.read_excel('Elements.xlsx')
#converting atomic number column to a list
Z=x['Z'].tolist()
#converting mass column to another list
A=x['A'].tolist()
#giving the constants some value
a1,a2,a3=14.1,13,0.595
#finding binding energy per nucleon of each element using liquid drop model
bepn=[]
for i in range(0,118):
    y=a1-(a2/(A[i])**(1/3))-(a3*Z[i]*(Z[i]-1)/(A[i])**(4/3))
    bepn.append(y)
#plotting the graph
plt.plot(A,bepn)
plt.xlabel("Atomic mass")
plt.ylabel("Binding energy per nucleon")
plt.show

The obtained graph shows y axis with a range from -50 to 10. But I want the y axis to be from 0 to 9. What should I change in the code to do that?

It seems to me it's not a problem with matplotlib, it's your methodology for computing the binding energy. I suggest you to close this question and ask a new one, possibly on the physics or chemistry SE. — gboffi
– gboffi, Commented Aug 1, 2020 at 20:24

Andres Ordorica · Accepted Answer · 2020-08-01 16:21:32Z

1

You should try this :

plt.ylim(0, 10)

answered Aug 1, 2020 at 16:21

Andres Ordorica

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Comments

Jancer Lima · Accepted Answer · 2020-08-01 14:41:17Z

0

You can slice y before plotting it on the graph, but you need to do this with x too.

If the y values are all integers, you can do the following:

plt.plot(A[50:],bepn[50:])

answered Aug 1, 2020 at 14:41

Jancer Lima

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