(5)connection问题部分内容参见 生信技能树课程 R 包基本介绍与相关函数 mean(), list(), sample(),这些function 都来自于某...http://mirrors.tuna.tsinghua.edu.cn/CRAN/")) options(BioC_mirror="http://mirrors.ustc.edu.cn/bioc/") R包安装与加载...判断式安装有时候我们不确定安装的R包是否已经...
exons_gene_lens<-parLapply(cl,exons_gene,function(x){sum(width(reduce(x)))})exons_gene_lens[1:10]##转换为dataframe geneid_efflen<-data.frame(geneid=names(exons_gene_lens),efflen=as.numeric(exons_gene_lens))geneid_efflen_gtf1<-geneid_efflen 2.利用rtracklayer包导入gtf处理 代码语言:...
R语言中怎么画自定义函数图像p=function(n,m){N=10^6x=c(rep(0,5),1)z=numeric(N)for(i in 1:N){y=sample(x,n,replace=T)z[i]=sum(y)>=m}return(sum(z)/N)}当m=2,3,4时,把这三函数在同一个坐标化成散点图,然后拟合曲线! 答案 用curve(function,add=T)试试相关...
【题目】求和:$$ x + 2 x ^ { 2 } + 3 x ^ { 3 } + \ldots \ldots + n x ^ { n } ( n \in R ) $$ 相关知识点: 试题来源: 解析 【解析】 当$$ x = 1 $$时,$$ S _ { n } = 1 + 2 + 3 + . . . + n = \frac { n ( n + 1 ) } { ...
read.gmt=function(filename){ if(!file.exists(filename))stop('File ',filename,'not available\n') dat=readLines(filename) n=length(dat) res=list(genesets=vector(mode="list",length=n),geneset.names=vector(mode="character",length=n),geneset.descriptions...
[12] SOUSA F M G,NUNES F D.New expressions for the autocorrelation function of BOC GNSS signals[J].Navigation,2013,60(1):1-9. [13] BETZ J W,KOLODZIEJSKI K R.Generalized theory of code tracking with an early-late discriminator part II:noncoherent processing and numerical results[J].IE...
for-in语句是一种精准迭代语句,可以用来枚举对象的属性,用以遍历一个对象的全部属性。 for…in声明用于对数组或者对象的属性进行循环操作; for…in循环中的代码每执行一次,就会对数组的元素或对象的属性进行一次操作。 for-in的语法: for (变量 in 对象) ...
Set N-FINDR Parameter Values for Finding Endmembers This example uses: Copy CodeCopy Command Read a hyperspectral data into the workspace. hcube = hypercube('paviaU.hdr'); Find the number of spectrally distinct endmembers present in the hyperspectral data cube by usingcountEndmembersHFCfunction....
function sj(i%, a%, b%) as longDim x%x = Int(Rnd * (b - a + 1)) + asj=xEnd functionPrivate Sub Command1_Click()Dim n%, a%, b%, i%, x%,r%n = InputBox("请输入随机整数的个数n")a = InputBox("请输入取值范围的下限a")b = InputBox("请输入取值范围的上限b")For i...
CDH2encodes a 906 amino acid protein, neuronal cadherin (N-cadherin), that is broadly expressed in the brain. It is known to play an essential role in synaptogenesis, synapse function, plasticity-induced long-term spine stabilization, and cortical organization. Classical cadherins are initially syn...