A. data.frame() B. matrix() C. list() D. vector() 相关知识点: 试题来源: 解析 A。本题考查 R 语言中创建数据框的函数。B 选项 matrix()用于创建矩阵;C 选项 list()创建列表;D 选项 vector()创建向量。A 选项 data.frame()用于创建数据框。反馈 收藏 ...
Which function with Matrix in R Finally, we have arrived at the matrix in R. Well, you can use the which() function in R language to get the position of the values in a matrix. You will also get to know about the arr.index parameter in this section. First things first - Create a...
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2. 函数function:函数定义 source:调用文件 call:函数调用.C,.Fortran:调用C或者Fortran子程序的动态链接库。Recall:递归调用browser,debug,trace,traceback:程序调试options:指定系统参数 missing:判断虚参是否有对应实参nargs:参数个数 stop:终止函数执行on.exit:指定退出时执行 eval,expression:表达式计算system.time:...
is.finite,is.function,is.language,is.recursive ,match.arg,match.call,match.fun,model.extract,name,parse,substitute,sys.parent ,warning,machine 三、输入输出 cat,print:显示对象 sink:输出转向到指定文件 dump,save,dput,write:输出对象 scan,read.table,load,dget:读入 ...
R Language Shapes & Sizer with Remote AEs If the/tmp/remote.Rfile is updated to include the last two lines of the code sample below, the remote R AE can be registered and run with TABLE(ANY) specified as its output. nz.fun <-function(){if(!exists('x', envir=.GlobalEnv)) x <<...
function_name(input) The input(s) are calledarguments, which can include: the physical object (any data structure) on which the function carries out a task specifications that alter the way the function operates (e.g. options) Not all functions take arguments, for example: ...
The print function has many optional parameters. Notice that the output in Figure 1 displays data item indices starting at 1. For array, matrix and object indices, R is a 1-based language, rather than 0-based like the C# language. The linear regression analysis is performed with these two...
Functions usually take arguments which are variables that the function operates on. For example, the mean() function takes a vector as an argument, like in the case of mean(c(2,6,8)). The mean() function then adds up all of the numbers in the vector and divides that sum by the len...