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Thank You Very Much！
I have solved the trouble，maybe the reason is 'anaconda'，anaconda makes
python as a part of itself，
so I can import QuantLib in anaconda，but I can not do the same thing in
python.
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Hi Federico,
the easiest way might be to modify the rate helpers so that quoteError() returns the implied value. If you want to contribute the modifications, you'd also have to keep the old behavior, so you should add a boolean parameter or an enumeration to select the new or the old calculation. This would allow you to reuse most of the current code.
Ferdinando, you wanted to work in this direction, too. Any comments? (For instance, about extending this approach to other instruments such as deposits, FRAs or futures?)
Luigi
On Mon, Dec 21, 2015 at 11:02 AM Federico Cozzi <<a rel="nofollow" ymailto="mailto:f.cozzi@gmail.com" target="_blank" href="javascript:return">f.cozzi@...> wrote:
Hello,
I would like to use Quantlib to bootstrap yield curves in a multi-curve
environment.
I read Ballabio's guide "Implementing Quantlib" and browsed source code. I
understand that IterativeBootstrap's algorithm, which relies on
BootstrapHelper, tries to equate market quote with implied quote.
I would like to use a slightly different approach: I would like to equate
the implied value with 0. The result should be the same, but code could be
simpler: for instance computing the swap value could be simpler that
computing the swap par rate.
(I see that Real SwapRateHelper::impliedQuote() contains the comment "weak
implementation... to be improved")
What is the easiest way to modify Quantlib code to perform this different
algorithm? Perhaps I could write my own RateHelpers, where I redefine the
quoteError method. But since IterativeBootstrap is quite general, perhaps
there is a better method.
Regards,
Federico Cozzi
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Sorry Luigi,
with these lines I seem to get the error:
Severity Code Description Project File Line
Error C2512 'QuantLib::DeltaVolQuote::DeltaVolQuote': no appropriate default
constructor available NQuantLibc
C:\QuantLib-SWIG\CSharp\cpp\quantlib_wrap.cpp 80873
When I go to the refere line what I see is:
SWIGEXPORT void * SWIGSTDCALL CSharp_new__DeltaVolQuote() {
void * jresult ;
DeltaVolQuote *result = 0 ;
{
try {
result = (DeltaVolQuote *)new DeltaVolQuote();
} catch (std::out_of_range& e) {
{
SWIG_CSharpException(SWIG_IndexError, const_cast<char*>(e.what()));
return 0;
};
} catch (std::exception& e) {
{
SWIG_CSharpException(SWIG_RuntimeError,
const_cast<char*>(e.what())); return 0;
};
} catch (...) {
{
SWIG_CSharpException(SWIG_UnknownError, "unknown error"); return 0;
};
}
}
jresult = (void *)result;
return jresult;
}
Any ideas?
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