preprocessing-methods
代码说明：
一阶导数、二阶导数，矢量归一化（SNV），多元散射校正（MSC），数据中心化，直接信号校正，平滑处理六种光谱数据预处理的方法(A first derivative, second derivative, vector normalization (SNV), multiplicative scatter correction (MSC), the data center of the direct signal correction, smoothing six kinds of spectral data preprocessing methods)
文件列表：
预处理
......\auto.m,399,2013-01-09
......\center.m,310,2013-01-09
......\dosc.m,2064,2013-01-09
......\msc.m,730,2015-02-01
......\nirmaf.m,1167,2013-01-09
......\normaliz.m,497,2013-01-09
......\prpress.asv,5541,2015-02-02
......\prpress.M,5722,2015-02-02
......\rescal.m,496,2013-01-09
......\savgol.m,1157,2013-01-09
......\scal.m,450,2013-01-09
......\sgoval.asv,1187,2013-01-11
......\sgoval.m,1185,2015-02-01
......\snv.m,350,2015-02-01
......\x.mat,336431,2015-02-01
......\所有NACL溶液.xls,1718784,2015-01-30
......\最小二乘法 代码.txt,1542,2013-01-12
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