Hi Roberto, You may be interested to look at the class TSpectrum. See http://root.cern.ch/root/htmldoc/TSpectrum.html This class is based on an original implementation by Miroslav Morhac. References are given in this web page. In particular: M.Morhac et al.: Efficient one- and two-dimensional Gold deconvolution and its application to gamma-ray spectra decomposition. Nuclear Instruments and Methods in Physics Research A 401 (1997) 385-408. There are examples of deconvolutions that you can download from: ftp://root.cern.ch/root/SpectrumDec.ps.gz In the attachment you will find - a macro example Peakdec1.C - a file Spectrum.root used by the macro. Rene Brun Roberto Catanuto wrote: > > I need to make a convolution of aa landau of a landau with a gaussain and > then: > > * draw this function > * fit a set of experimental data with this function > > Pleas, note that i do not have an analytical expression of it since it is not > possible to calculate the integral. > May you address me to some "root" capabilities to overcome this problem or > tell me who knows something about that? > Thanks a lot. > > -- > Roberto Catanuto > INFN, Milan > ITALY > >
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