Example 1: Sums of Columns Using dplyr Package In this Example, I’ll explain how to use the replace,is.na, summarise_all, andsumfunctions. You can see the colSums in the previous output: The column sum of x1 is 15, the column sum of x2 is 7, the column sum of x3 is 35, and...
> # Use apply to calculate the sum of the rows across all thematrices. > result <- apply(new.array, c(1), sum) > result [1] 56 68 60 >apply(x,1,sum)#行和 >apply(x,2,mean)#列平均 有缺失值时 >apply(x,1,mean,na.rm=TRUE)...
# 列出变量 > colnames(table1_1) [1] "学生姓名" "统计学" "数学" "管绩学" "管理学" "会计学" # 变量的数据类型 > library(tidyverse) > glimpse(table1_1) Rows: 10 Columns: 6 $ 学生姓名 <chr> "张青松", "王宇翔", "田思雨", "徐丽娜", "张志杰", "赵颖颖", "王智强", "宋丽媛...
tb_students=as_tibble(df_students)# Take the union of the column names.tb_students=tb_students%>%rowwise()%>%mutate(myTidySum=sum(c_across(Maths|Statistics|Programming)))tb_students=as_tibble(df_students)# Give a range of columns as a range of names.tb_students=tb_students%>%rowwise(...
## Warning in rbind(1:3, 1:5): number of columns of result is not amultiple ## of vector length (arg 1) m #虽警告但仍自动补齐了 ## [,1] [,2] [,3] [,4] [,5] ## [1,] 1 2 3 1 2 ## [2,] 1 2 3 4 5
R语言 colSums()用法及代码示例R 语言中的 colSums() 函数用于计算矩阵或数组列的总和。 用法: colSums (x, na.rm = FALSE, dims = 1) 参数:x:矩阵或数组dims:这是一个整数值,其维度被视为 ‘columns’ 求和。它超过尺寸 1:dims。 范例1: # R program to illustrate # colSums function # ...
I’m trying to sum only one of my columns so I’ve tried the sum(data$column) function but it replies NA. Same with colsums. I’ve tried seperating my column into its own dataframe. It doesn’t give an error but it returns NA. My field is numerical (i checked with is.numeric...
In rbind(x1, x2) :number of columns of result is not a multiple of vector length (arg 1) 这里由于x1是1行3列,而x2是1行4列,所以按行合并时,会按照较长的向量x2来,x1的第四位会自动循环补上。 > cbind(x1,x2) x1 x2 [1,] 71 3 ...
Error in `[.data.frame`(df, c("XX")) : undefined columns selected 1. 2. 二是可以输入坐标(格式为[行坐标,列坐标])返回,返回结果仍为数据框,比如返回第2到第10行: > df[1:10, ] B_A id DV 1 A1 1 241.4539 2 A1 2 276.0513
select参数选择要返回的columns drop参数,如有一列数据是否降维 cbind/rbind:矩阵、数据框 merge:数据框 > m<-matrix(1:6,nrow=3) > d<-data.frame(name=c("Jack","Marry","Jobs"),age=c(23,34,25),score=c(2,4,7)) > dx<-data.frame(name=c("Jack","Lucy","Jobs"),age=c(...