Rcpp::DataFrame example for Rcpp – deprecated APIDirk EddelbuettelRomain Francois
1、R中的数据结构-Array #一维数组 x1 <- 1:5; x2 <- c(1,3,5,7,9) x3 <- array(c(2...
1、R中的数据结构-Array 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #一维数组 x1 <- 1:5; x2 <- c(1,3,5,7,9) x3 <- array(c(2, 4, 6, 8, 10)) #多维数组 xs <- array(1:24, dim=c(3,4,2)) #访问 x1[3] x2[c(1,3,5)] x3[3:5] xs[2, 2, 2] xs[2, ...
R语言中如何找出在两个数据框中完全相同的行(How to find common rows between two dataframe in R?) I would like to make a new data frame which only includes common rows of two separate data.frame. example: data.frame 1 1 2 3 4 5 6 1 id300 2 id2345 3 id5456 4 id33 5 id45 6 i...
A twist on the prior example. If you needed toremove several duplicate columns from a dataframe, consider using the following snippet. # delete multiple columns in r # delete column in R by mapping Null value to them dataset$firstcol <- dataset$nextcol <- dataset$anothercol <- NULL ...
R语言使用RODBC包连接、操作SQLserver核access数据库、使用sqlFetch函数读取指定表中的全部数据并保存到dataframe中 # RODBC Example # import 2 tables (Crime and Punishment) from a DBMS # into R data frames (and call them crimedat and pundat) library(RODBC) myconn <-odbcConnect("mydsn", ...
How to manipulate this object to URL query parameter.The example the the query parameter should be advocates=7195&categories=25&checkbox-active=true&checkbox-close=undefined&checkbox-f... How do I pass part of a hash to a subroutine?
R语言内置函数(Built-in Functions) R中几乎所有的事情都是通过函数完成的。 下表提供了其它常用的统计函数。 R语言中每个数值运算函数都有na.rm选项,以便在计算前删除缺失值。否则,缺少值的存在将导致结果也是缺失值。统计函数的运算的对象可以是向量也可以是dataframe Function Description mean(x, trim=0, na.rm...
library(tidyr) data.example <- read.csv("text.csv") gather(data.example, time, value, -depth, -sensor) # depth sensor time value # 1 1 1 4 0.9784983 # 2 2 1 4 0.9897878 # 3 1 2 4 0.9286928 # 4 2 2 4 0.9376116 # 5 1 3 4 0.9525189 ...
The following example will pan the extent of a data frame by passing in the extent of selected features for a specific layer. TheLayerclassgetSelectedExtentmethod is used for this purpose. df.panToExtent(lyr.getSelectedExtent()) zoomToSelectedFeatures () ...