www.gusucode.com > EasyKrig_V3.0工具箱matlab源码程序 > EasyKrig_V3.0/dataprep/datatransform.m
function yout=datatransform(trans_flag,yin,trans_type) %%% Data Transformation/Inverse Data Transformation %% trans_flag = 1 Forward Transform %% = 2 Inverse Transform %% %% Kriging Software Package version 3.0, May 1, 2004 %% Copyright (c) 1999, 2001, 2004, property of Dezhang Chu and Woods Hole Oceanographic %% Institution. All Rights Reserved. global data para hdl if nargin == 2 trans_type=get(hdl.dataprep.transform,'value'); end para.dataprep.transform_index=trans_type; if trans_flag == 1 % Data Transformation with specified type switch trans_type case 1 yout=yin; case 2 yout=log10(yin+1); case 3 yout=log(yin+1); case 4 yout=10*log10(yin+1); case 5 yout=10*log(yin+1); case 6 yout=log10(abs(yin)+eps); case 7 yout=log(abs(yin)+eps); end else %% Inverse Data Transformation switch trans_type case 1 yout=yin; case 2 yout=10.^yin-1; case 3 yout=exp(yin)-1; case 4 yout=10.^(0.1*yin)-1; case 5 yout=exp(0.1*yin)-1; case 6 yout=10.^yin; case 7 yout=exp(yin); end end