subset函数接受两个参数,第一个参数是要筛选的矩阵,第二个参数是筛选条件。 # 使用subset函数筛选大于3的子集subset_data<-subset(matrix_data,matrix_data>3)# 查看筛选结果subset_data 1. 2. 3. 4. 5. 在上述代码中,我们使用subset函数筛选出了矩阵中大于3的子集,并将结果存储在subset_data中
apply(m,dimcode,f,fargs) 允许用户在各行各列调用函数 m 矩阵,dimcode 1代表行, 2代表列,f函数,frags可选参数,函数大于一个参考时使用用“,”隔开。 > mymatrix<-matrix(c(1:25),5,5) #建立了一个矩阵 > mymatrix [,1] [,2] [,3] [,4] [,5] [1,] 1 6 11 16 21 [2,] 2 7 12...
subset, na.action = NULL, drop = FALSE, sep = ".", lex.order = FALSE) ## Default S3 method: boxplot(x, ..., range = 1.5, width = NULL, varwidth = FALSE, notch = FALSE, outline = TRUE, names, plot = TRUE, border = par("fg"), col = NULL, log = "", pars = list(b...
AI代码解释 >matrix1[,1][,2][,3][,4][1,]161116[2,]271217[3,]381318[4,]491419[5,]5101520>matrix1[1,3]=NA>matrix1[,1][,2][,3][,4][1,]16NA16[2,]271217[3,]381318[4,]491419[5,]5101520>mean(matrix1)[1]NA>data=as.data.frame(matrix1)#将矩阵转化为数据框>dataV1V2V3V4...
apply(m,dimcode,f,fargs) 允许用户在各行各列调用函数 m 矩阵,dimcode 1代表行, 2代表列,f函数,frags可选参数,函数大于一个参考时使用用“,”隔开。 > mymatrix<-matrix(c(1:25),5,5) #建立了一个矩阵 > mymatrix [,1] [,2] [,3] [,4] [,5] [1,] 1 6 11 16 21 [2,] 2 7 12...
向量:NumericVector、IntegerVector、CharacterVector矩阵:NumericMatrix、IntegerMatrix、CharacterMatrix数据框:DataFrame列表:List函数:Function其他类型:Environment,ComplexVector,RawVector,DottedPair,Language,Promise,Symbol,WeakReference 我们看下Rcpp中数学运算及处理函数: ...
cor_gather(): takes a correlation matrix and collapses (or melt) it into long format data frame (paired list) cor_spread(): spread a long correlation data frame into wide format (correlation matrix). 相关矩阵取子集 cor_select(): subset a correlation matrix by selecting variables of interest...
layout(matrix(c(1,1,2,3), 2, 2, byrow = TRUE)) hist(wt) hist(mpg) hist(disp) detach(mtcars) # 三个图像,2×2布局,第一行高度:第二行高度=1:2;第二行第一个图像宽度:第二行第二个图像宽度=3:1 attach(mtcars) layout(matrix(c(1, 1, 2, 3), 2, 2, byrow = TRUE),...
When looking to create more complex subsets or a subset based on a condition, the next step up is to use the subset() function. For example, what if you wanted to look at debt from someone named Dan. You could just use the brackets to select their debt and total it up, but it isn...
Thers_matrix()function can now be used to produce a function that constructs these matrices. #Calculate matricesmatrix_constructor<-with(sales, rs_matrix(date,date_prev,price,price_prev))matrices<-sapply(c("Z","X","y","Y"),matrix_constructor)matrices$Z ...