63 lines
1.3 KiB
Python
63 lines
1.3 KiB
Python
import numpy as np
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#obvious solution
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#(nicer version of:)
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#[[ 0.95911082 0.27747321 0.0558132 ]
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# [-0.14426784 0.64893967 -0.74703693]]
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#(maybe)
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#[[ 0.97660659 0.20377678 0.06866321]
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# [-0.09744323 0.70403038 -0.70345294]]
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#saw one (but did not copy) that looked like
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#[[ 1.0, 0.0, 0.0],
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# [ 0.0, 0.7,-0.7]]
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#but there is a secondary solution
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#[[ 0.34055104 0.35392664 -0.87106881]
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# [-0.64936382 0.75853476 0.0543288 ]]
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#x,x**2+y+z,z
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#translated into
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#a=x+x**2+y+z-2.5*z
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#b=x**2+y+z-(13/15)*x
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#find a(b)
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#a-const*b=const
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#x-(13/15)*x
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#+(x**2+y+z)-(x**2+y+z)
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#-2.5*z
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#=2x/15-2.5z
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#not great, but...
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#tertiary solution
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#[[ 0.86908816 0.3797459 -0.31698411]
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# [-0.49261647 0.60629139 -0.62429142]]
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#which looks like a mirrored version of
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#[[ 0.93229881 -0.19299482 0.30589537]
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# [ 0.3481528 0.70805987 -0.61436217]]
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#which of course makes some sense
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def data(n=1000):
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"""
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Generate 3d data, where a and b have a relation, but x=x(a,b), y=y(a,b), z=z(a,b) will be returned
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"""
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a=np.random.uniform(-1.0,1.0,n)
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b=a**2+np.random.uniform(-0.2,0.2,n)
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c=np.random.uniform(-1.0,1.0,n)
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x=a
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y=b+c
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z=c
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return x,y,z
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if __name__ == '__main__':
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x,y,z=data()
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from plt import plt
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plt.plot(x,y,'.')
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plt.show()
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#print(x,y,z)
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