Set lower limit when using matplotlib.axis('equal')

Question

I want to plot data with matplotlib where equal x and y increments have the same length. This works fine with

 ax1.axis('equal')

where ax1 is a subfigure()

However setting the lower limits like this:

ax1.set_xlim(left=lowerlimit)
ax1.set_ylim(bottom=lowerlimit)

doesn't work. I also tried something like this which didn't work either:

ax1.axis('equal', xmin=lowerlimit,ymin=lowerlimit)

Can anyone help me?

Edit: Here a minimal example to show the problem:

import matplotlib.pyplot as plt
fig, ax1 = plt.subplots()
x = [0,1,2,3,4,5]
y = [0,-1,-3,-2,-1,-2]
ax1.plot(x,y)
ax1.set_xlim(0,6)
ax1.set_ylim(0,-6)
ax1.axis('equal')
ax1.set_ylim(bottom=0)
plt.show()

Even though I explicitly set the lower limit of the y-axis to 0 after calling ax1.set_ylim(bottom=0) the lower limit of the plot is -1.

Answer 1

In your MWE, change:

ax1.axis('equal')

with:

ax1.set_aspect('equal',adjustable='box')