函数逼近\Chebyshev.m ........\DFF.m ........\FZZ.m ........\Legendre.m ........\lmz.m ........\LZXEC.m ........\multifit.m ........\Pade.m ........\SmartBJ.m ........\SmartYTBJ.m ........\ZJPF.m ........\ZJZXEC.m 函数逼近