I want to:
I can plot the graph perfectly with only one y-axis, BUT as soon as I uncomment "ax2 = ax1.twinx()", the minor gridlines of the primary axis disappear. Picture: The correct format with single plot, and the minor_grid-problem with two plots.
Thank you in advance!
def plot_graph(x, y1, label1, y2, label2, title):
fig, ax1 = plt.subplots()
# Plotting y-axis 1
ax1.set_xlabel('Time (s)')
ax1.set_ylabel(label1, color = "red")
ax1.grid(which='major',axis='both', color='black', linewidth=1)
ax1.grid(which='minor',axis='y', color='gray', linewidth=0.3)
ax1.tick_params(axis = 'y')
ax1.plot(x, y1, color = "red")
# Plotting secondary y-axis with the same x-axis
ax2 = ax1.twinx() # PROBLEM: this alone hides the ax1 minor grid
ax2.set_ylabel(label2, color = 'blue')
ax2.plot(x,y2,color = 'blue')
ax2.tick_params(axis = 'y')
plt.minorticks_on()
plt.legend(loc='best')
plt.title(title)
plt.show()
return
Problem solved.
'''
plot_graph(x, y1, label1, y2, label2, title):
fig, ax1 = plt.subplots()
#Plotting y-axis 1
ax1.set_xlabel('Time (s)')
ax1.set_ylabel(label1, color="red")
ax1.grid(which='major',axis='x', color='black', linewidth=1) # x major black
ax1.grid(which='minor',axis='x', color='gray', linewidth=0.3) # x minor gray
ax1.grid(which='major',axis='y', color = 'k', linewidth=1) # y major black
ax1.grid(which='minor',axis='y', color = 'gray',linewidth=0.3) # y minor gray (this was not showing)
ax1.plot(x, y1, color = "red")
plt.minorticks_on() # NEW PLACE - SOLUTION
#Plotting secondary y-axis with the same x-axis
ax2 = ax1.twinx()
ax2.set_ylabel(label2, color = 'blue')
ax2.plot(x,y2,color = 'blue')
ax2.tick_params(axis = 'y')
#plt.minorticks_on() # OLD PLACE
plt.legend(loc='best')
plt.title(title)
plt.show(block=False)
return
