My data is the following:
x = [3,4,5,6,7,8,9,9]
y = [6,5,4,3,2,1,1,2]
x = [3,4,5,6,7,8,9]
y = [6,5,4,3,2,1,1.5]
ax.plot(x, y, 'o-', label='curPerform')
x1,x2,y1,y2 = ax.axis()
x1 = min(x) - 1
x2 = max(x) + 1
Yes, you must do the calculation yourself.
plot plots the data you give it. If you want to plot some other data, you need to calculate that data yourself and then plot that instead.
Edit: A quick way to do the calculation:
>>> x, y = zip(*sorted((xVal, np.mean([yVal for a, yVal in zip(x, y) if xVal==a])) for xVal in set(x))) >>> x (3, 4, 5, 6, 7, 8, 9) >>> y (6.0, 5.0, 4.0, 3.0, 2.0, 1.0, 1.5)