MartyConnelly
martyconnelly at shaw.ca
Fri Jul 1 15:59:56 CDT 2005
Does your code measure up to this standard. This is just a quick peek at the code and the stats used. Not a argument for or against each position. This is part of the analysis, that forms the basis for billions of dollars being spent on Global Warming. Golub's CSVD routine is kind of old and if I remember right machine dependant. SVD routines (Singular Value Decomposition) are a method of solving linear least squares problems. The argument http://en.wikipedia.org/wiki/Temperature_record_of_the_past_1000_years Ok, now here is some of the original code from Mann's site, about 400 lines of text. Note the use of goto's and other achronisms. This isn't a plug for use of IDL language. ftp://holocene.evsc.virginia.edu/pub/MBH98/TREE/ITRDB/NOAMER/pca-noamer.f what routine does remove the 1902-1980 mean calc the SD over this period divide the whole series by this SD, point by point remove the linear trend from the new 1902-1980 series compute the SD again for 1902-1980 of the detrended data divide the whole series by this SD. Be aware that not all the software code and data has been fully released so their is much bickering involved. More info: William Connolley's view Anatartic Climate Modeler http://groups-beta.google.com/group/sci.environment/msg/9a3673c6a0d64c1f?hl=en&lr=&c2coff=1&rnum=5 Answer to natures rejection of McKitrick and McIntyre rejection of Mann's data and Analysis http://www.uoguelph.ca/~rmckitri/research/fallupdate04/update.fall04.html Another blog http://www.j-bradford-delong.net/movable_type/2004-2_archives/000406.html C SVD routines from "Numerical Recipes in C" book online can be had here http://www.library.cornell.edu/nr/cbookcpdf.html C SVD routines from "Numerical Recipes in C" book online can be had here http://www.library.cornell.edu/nr/cbookcpdf.html -- Marty Connelly Victoria, B.C. Canada