How to generate normal noise for a function

asked 2015-02-25 22:45:44 +0100

fehu
13 ●2

updated 2015-02-26 14:15:48 +0100

slelievre
17704 ●22 ●160 ●350 http://carva.org/samue...

sage: func(x) = x^2
sage: func_noise = func + normalvariate(0,1); func_noise
x |--> x^2 - 0.4436993396832335

How can one force the normalvariate to generate the number only on function evaluation?

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answered 2015-02-25 23:18:45 +0100

tmonteil
27423 ●31 ●204 ●517 http://wiki.sagemath.o...

From your description, it is not clear what do you want to do, but perhaps you should use Python function instead of symbolic function:

sage: func_noise = lambda x : x^2 + normalvariate(0,1)
sage: func_noise
<function <lambda> at 0xad99aa3c>
sage: func_noise(2)
3.1200300365934908
sage: func_noise(2)
2.6179089142775314
sage: func_noise(2)
3.9386360734990973
sage: func_noise(2)
4.340588637274914

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Asked: 2015-02-25 22:45:44 +0100

Seen: 383 times

Last updated: Feb 26 '15

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