import numpy
from matplotlib import pyplot
import math
from matplotlib import rcParams
rcParams['font.family'] = 'serif'
rcParams['font.size'] =16


fig = pyplot.figure(figsize=(12,7))
fig.subplots_adjust(wspace=.3)

sub1 = fig.add_subplot(221)
sub2 = fig.add_subplot(222)

sub1.tick_params(labelsize=15)
sub2.tick_params(labelsize=15)

sub1.set_ylim(0,1)
sub2.set_ylim(0,1.2)

sub1.set_xlabel('${x}$')
sub1.set_ylabel('${u_o}$') 

sub2.set_xlabel('${x}$')
sub2.set_ylabel('${u}$') 

sub1.set_title('Initial gene concentration', ha= 'center')
sub2.set_title('Propagation of gene mutation')