list_data[4] <- NULL #删除 # Create two lists. list1 <- list(1,2,3) list2 <- list("Sun","Mon","Tue") # Merge the two lists. merged.list <- c(list1,list2) 1. 2. 3. 4. 5. 6. 7. 转换列表为向量 # Convert the lists to vectors. v1 <- unlist(list1) 1. 2. 条...
l= list("John","Silver")w= list(name="John", surname="Silver", alias="Long John", age=30, alive="yes")z= list(name="James", surname="McGraw", alias="James Flint", age=45, alive ="unknown")#You can concatenate lists into lists:v= c(w,z)#注意还是list 获取元素(注意是[[]]...
# Map existing dataset to first input port dataset1 <- maml.mapInputPort(1) # class: data.frame # Concatenate dataset1 to dataset 1 newdataset = rbind(dataset1, dataset1) # Send the combined dataset to the output port maml.mapOutputPort("newdataset"); 读取ZIP 文件作为输入此...
# R Data Types:Vectors and Lists #===# ## Creating Vectors # the c() function can be used to create vectors of objects. # NOTE: 此处c是concatenate的缩写,中文意思串联。而不是combine x <- c(0.5,0.6) ## numeric x <- c(TRUE,FALSE) ## logical x <- c(T,F) ## logical x <-...
my_martix <- matrix(nrow = 8, ncol = 4)# It creates a matrix with 8 rows and 4 cloumns.# But initially they all are empty(NA).# These are used to enter the data into the matrix.# Here c() function is used to concatenate the data.# In the below example the data is filled ...
type of the returned value, and all attributes except names are removed.所以“c"表示“combine”...
Title Interface for the'QuickJS'Lightweight'JavaScript'Engine Version1.0.8 Description An'R'interface to the'QuickJS'portable'JavaScript'engine.The engine is bundled entirely within the package,requiring no external system dependencies beyond a'C'compiler.License MIT+file LICENSE Encoding UTF-8 Roxy...
# Here c() function is used to concatenate the data. # In the below example the data is filled by column wise. my_martix[, 1] <- c(59, 55, 53.5, 55, 52.5, 57.5, 53, 55) my_martix[, 2] <- c(22.3, 19.7, 20.8, 20.3, 20.8, 21.5,20.6, 21.5) ...
This stands for “concatenate,” although you can also think of it as “combine” or “collection.” This function creates a single vector with the items you assign to it. As a note, RStudio has a convenient shortcut for the assignment operator, <-. When you are typing in your code,...
my_martix<-matrix(nrow=8,ncol=4)# It creates a matrixwith8rows and4cloumns.# But initially they all areempty(NA).# These are used to enter the data into the matrix.# Herec()functionis used to concatenate the data.# In the below example the data is filled by column wise.my_martix...