/Python/Matplotlib force scientific notation and define exponent

Matplotlib force scientific notation and define exponent

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.ticker

class OOMFormatter(matplotlib.ticker.ScalarFormatter):
    def __init__(self, order=0, fformat="%1.1f", offset=True, mathText=True):
        self.oom = order
        self.fformat = fformat
        matplotlib.ticker.ScalarFormatter.__init__(self,useOffset=offset,useMathText=mathText)
    def _set_order_of_magnitude(self):
        self.orderOfMagnitude = self.oom
    def _set_format(self, vmin=None, vmax=None):
        self.format = self.fformat
        if self._useMathText:
            self.format = r'$\mathdefault{%s}$' % self.format


x = np.linspace(1,9,9)
y1 = x*10**(-4)
y2 = x*10**(-3)

fig, ax = plt.subplots(2,1,sharex=True)

ax[0].plot(x,y1)
ax[1].plot(x,y2)

for axe in ax:
    axe.yaxis.set_major_formatter(OOMFormatter(-4, "%1.1f"))
    axe.ticklabel_format(axis='y', style='sci', scilimits=(-4,-4))

plt.show()

Source: stackoverflow.com

Similar codes

0 vote284 views1 answer
How to implement dfa in python
Python
1 vote303 views1 answer
Python datetime round to nearest hour
Python
0 vote298 views1 answer
Standardizing column names pandas
Python
4 votes259 views1 answer
Python read dictionary from file
Python
0 vote284 views2 answers
Python creare una list comprehension
Python
0 vote252 views10 answers
String float to round to 2dp python
Python
23 votes378 views6 answers
Flask post
Python Flask
1 vote320 views1 answer
Python repeating scheduler
Python
13 votes303 views4 answers
Pickle save
Python
0 vote288 views1 answer
Insert video in tkinter
Python