Sha256: 0a95044b7be5d92eb84379767a297442474dd3becb25aa7a6a8f2b76526c949b
Contents?: true
Size: 943 Bytes
Versions: 22
Compression:
Stored size: 943 Bytes
Contents
#!/usr/bin/env ruby
require("gsl")
params = [1.0, 10.0]
func = GSL::MultiRoot::Function.alloc(2, params) { |x, params, f|
a = params[0]
b = params[1]
x0 = x[0]
x1 = x[1]
f[0] = a*(1 - x0)
f[1] = b*(x1 - x0*x0)
}
fsolver = GSL::MultiRoot::FSolver.alloc("hybrids", 2)
#fsolver = GSL::MultiRoot::FSolver.alloc("hybrid", 2)
#fsolver = GSL::MultiRoot::FSolver.alloc("dallocton", 2)
#fsolver = GSL::MultiRoot::FSolver.alloc("broyden", 2)
x = GSL::Vector.alloc(-10.0, -5.0)
fsolver.set(func, x)
#p fsolver.name
#p fsolver.x
iter = 0
IO.popen("graph -T X -C -g 3 -X x -Y y -S 4", "w") do |io|
begin
iter += 1
status = fsolver.iterate
root = fsolver.root
f = fsolver.f
printf("iter = %3u x = % .3f % .3f f(x) = % .3e % .3e\n",
iter, root[0], root[1], f[0], f[1])
io.printf("%e %e\n", root[0], root[1])
status = fsolver.test_residual(1e-7)
end while status == GSL::CONTINUE and iter < 1000
end
Version data entries
22 entries across 22 versions & 4 rubygems