Created
June 27, 2017 07:14
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a basic curve
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| import numpy as np | |
| import pylab as pl | |
| def f(x): | |
| return x**3 -3*x + 4 | |
| Y, X = np.mgrid[-10:10:100j, -10:10:100j] | |
| print "res" | |
| ys = list() | |
| xs = list() | |
| for i in range(0,len(Y)): | |
| res = f(X.ravel()[i]) | |
| if res > 0: | |
| ys.append(np.sqrt(res)) | |
| xs.append(X.ravel()[i]) | |
| pl.plot(xs, ys, "o") | |
| pl.plot(xs, [-x for x in ys], "o") | |
| pl.show() |
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