Claude
Posts:
2
Registered:
11/6/12


Numerical integration with maxima
Posted:
Nov 6, 2012 5:46 AM


Dear readers
I would like to numerically integrate the function abs(sin(x)) over the domain 0 to 2*pi.
I've defined the function f=abs(sin(x))
and then I called
integrate(f, x, 0, 2*pi)
But now I don't know how to numerically evaluate this integral.
Manually, it is easy to see that the result should be 4, but how to ask maxima to compute this ?
Similarly, I cannot plot this function over the same domain. I've tried :
wxplot2d([abs(sin(x))], [x,0,6.28])$
which gives the expected graph, but, if I replace the value 6.28 by 2*pi, wxmaxima says that
plotting: range must be of the form [variable, min, max]; found: [x,0,2*pi]
Can you please give me some advice?
Thank you in advance for your help

