Bill Allombert on Tue, 18 Feb 2014 23:15:07 +0100 |
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Re: Export points coordinates produced by |
On Tue, Feb 18, 2014 at 10:02:31PM +0100, Emmanuel Royer wrote: > Hello, > > Given a function f, Pari-Gp has nice algorithms to select the abscissas > x_1,...,x_n needed to produce the graph of f. > > How can I use these algorithms to produce a graph with another program > (like asymptote e.g.)? In other words, how can I export the coordinates > (x_1,f(x_1)),...,(x_n,f(x_n)) in a text files? I think the best solution is simply to save the values directly inside the ploth function: for example rewrite ploth(x=1,10,sin(x)) as: sav(x,fx)=write("points",[x,fx]);fx ploth(x=1,10,sav(x,sin(x))) You get a file 'points' with all the points. If you need a specific file format as output, you can use Strprintf: for example sav(x,fx)=write1("points",Strprintf("(%.9g,%.9g), ",x,fx));fx Cheers, Bill