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摘要: 转自:https://yoyoyohamapi.gitbooks.io/mit-ml/content/%E7%89%B9%E5%BE%81%E9%99%8D%E7%BB%B4/articles/PCA.html https://www.jianshu.com/p/162bb4ea1b7f 1.有什么 阅读全文
posted @ 2018-11-06 18:55 lypbendlf 阅读(199) 评论(0) 推荐(0)
摘要: "Let's C" is a popular and fun programming contest hosted by the College of Computer Science and Technology, Zhejiang University. Since the idea of th 阅读全文
posted @ 2018-11-06 15:42 lypbendlf 阅读(117) 评论(0) 推荐(0)
摘要: The Japanese language is notorious for its sentence ending particles. Personal preference of such particles can be considered as a reflection of the s 阅读全文
posted @ 2018-11-06 15:14 lypbendlf 阅读(143) 评论(0) 推荐(0)
摘要: 1.R中NA,NaN,Inf代表什么? NA:缺失数据 NaN:无意义的数,比如sqrt(-2) Inf:正无穷大 -Inf:负无穷大 判断是否存在nan值 is.na(x)#是否存在nan anyNA(x) sum(is.na(x))#存在几个nan值 2.确定一个数值型vector的第一个最值( 阅读全文
posted @ 2018-11-06 08:39 lypbendlf 阅读(201) 评论(0) 推荐(0)
摘要: This time you are asked to tell the difference between the lowest grade of all the male students and the highest grade of all the female students. Inp 阅读全文
posted @ 2018-11-05 23:17 lypbendlf 阅读(119) 评论(0) 推荐(0)
摘要: A linked list consists of a series of structures, which are not necessarily adjacent in memory. We assume that each structure contains an integer key  阅读全文
posted @ 2018-11-05 17:21 lypbendlf 阅读(199) 评论(0) 推荐(0)
摘要: The task of this problem is simple: insert a sequence of distinct positive integers into a hash table first. Then try to find another sequence of inte 阅读全文
posted @ 2018-11-05 15:33 lypbendlf 阅读(198) 评论(0) 推荐(0)
摘要: 在Rstdio使用的是3.5.1的64位R版本中遇到问题:The Perl script 'WriteXLS.pl' failed to run successfully. 首先使用 Sys.which("perl") 输出空串,表明未安装perl。 perl "" 安装上perl之后,运行又出现了 阅读全文
posted @ 2018-11-05 09:58 lypbendlf 阅读(876) 评论(0) 推荐(0)
摘要: 参数检验就是已知数据的精确分布模型,根据数据来求出模型中的未知参数;而非参数检验就是无需对样本总体分布(比如满足正态分布)做出假设。 1.符号检验 转自:https://baike.baidu.com/item/%E9%9D%9E%E5%8F%82%E6%95%B0%E6%A3%80%E9%AA%8 阅读全文
posted @ 2018-11-04 21:37 lypbendlf 阅读(14518) 评论(0) 推荐(0)
摘要: 转自:https://baike.baidu.com/item/RPKM/1197657 均反应基因的表达水平 1.RPKM的计算公式 分母是总共比对到这个基因的reads的数目(条 为单位),分母是:比对上的reads的总数(百万条为单位);外显子的长度也就是基因的长度(KB为单位)。 2.举个计 阅读全文
posted @ 2018-11-02 16:10 lypbendlf 阅读(3093) 评论(0) 推荐(1)
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