Find a bunch of data, approximate it with a function, or fit it.Make the error as small as possible

Filename	Size	Update
第15章\ysw15_1.lg4	4608	2014-04-10
第15章\ysw15_1.m	465	2015-01-01
第15章\ysw15_2.lg4	3584	2014-04-10
第15章\ysw15_2.m	694	2015-01-01
第15章\ysw15_3.m	1048	2015-01-01
第15章\ysw15_4.m	473	2015-01-01
第15章\ysw15_5.m	413	2015-01-01
第15章	0	2017-03-07

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