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<TITLE>Question GEVFIT in fExtremes</TITLE>
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<P><FONT FACE="Arial">Hello,</FONT>
<BR><FONT FACE="Arial">Doing some extreme value evaluations of wind speed data I found your very useful R-Package fExtremes. Since I started doing my evaluations in MatLab I had a chance to compare the results between the results of the MatLab gevfit and your gevfit routine. Because we need the data for the design of buildings I am interested in extremes of given return intervalls and the uncertainty, estimated from the confidence intervalls.</FONT></P>
<P><FONT FACE="Arial">Matlab's gevfit estimates the parameters of the GEV and provides another set of parameters for the limits of the confidence intervalls. From these I estimated the design values using the inverse of the GEV. From fExtremes I used the function gevrlevelPlot with the same confidence intervall (c=0.9) to get the uncertainty bands.</FONT></P>
<P><FONT FACE="Arial">As you can see from the attached Excel-File the MLM-fits of the GEV agree very well from both programs. Unfortunately the confidence bands do not agree. I tried to find out the reason from the documentation, but unfortunately did not succeed. I would appreciate, if you could be so kind, to give me a hint, what a possible reason might be??</FONT></P>
<P><FONT FACE="Arial">Thanks a lot in advance!</FONT>
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<P><FONT FACE="Arial">Kind regards,</FONT>
<BR><FONT FACE="Arial">Jürgen Brommundt</FONT>
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<P><FONT FACE="Arial" SIZE=2 COLOR="#000000"> <<windstatistik_fExtremes.xls>> </FONT>
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<P><B><FONT COLOR="#A1A1A1" SIZE=2 FACE="Verdana-Bold">Jürgen Brommundt<BR>
</FONT><FONT COLOR="#A1A1A1" SIZE=1 FACE="Verdana-Bold">Dr.-Ing., Projektingenieur<BR>
AF-Colenco AG, Grundwasserschutz und Entsorgung<BR>
</FONT></B><FONT COLOR="#A1A1A1" SIZE=1 FACE="Verdana">Täfernstrasse 26 | CH-5405 Baden | Schweiz<BR>
Direkt: +41 (0)56 483 15 35 | Fax: +41 (0)56 483 18 46<BR>
juergen.brommundt@afconsult.com | </FONT><A HREF="http://www.af-colenco.com"><FONT COLOR="#A1A1A1" SIZE=1 FACE="Verdana">www.af-colenco.com</FONT></A>
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