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2019-07-12 15:09:53 +0100 commented answer How to generate a nonsquare Vandermonde matrix?

Thank you for the answer.

2019-07-11 10:13:46 +0100 asked a question How to generate a nonsquare Vandermonde matrix?

According to the documentation, we can generate a Vandermonde matrix using the method matrix.vandermonde() or vandermonde().

But they generate only square matrix. How do we generate a Vandermonde matrix which is not a square matrix?

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2015-04-22 19:38:18 +0100 commented question How to generate an element from laplace distribution

I found a way to do this by using numpy in sage. http://docs.scipy.org/doc/numpy/refer...

import numpy numpy.random.laplace(loc,scal,size)

will generate an element for laplace distribution. But it is not a very "sage" way to do it. And I am still concerned about my first question.

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2015-04-21 21:57:56 +0100 asked a question How to generate an element from laplace distribution

Hi, I am wondering how to generate a random element according to laplace distribution. I tried the method RealDistribution(). But it failed.

According to the reference manual, laplace distribution is not supported. http://www.sagemath.org/doc/reference...

In the manual, there are some examples showing how to deal with uniform distribution, Gaussian distribution, etc.

My questions are:

(1) How do I know exactly which distributions are supported by the RealDistribution() method?

(2) Is there anyway I can simply generate an element according to laplace distribution in sage?

Thank you in advance.