R 语言中的 rowMeans() 函数用于找出 DataFrame 、矩阵或数组的每一行的均值。 用法: rowMeans(data) 参数:data: DataFrame 、数组或矩阵 例子1 # R program to illustrate # rowMean function # Create example values # Set seed set.seed(1234) # Create example data data <- data.frame(matrix(round(...
R语言中的rowMeans()函数是用来找出数据框、矩阵或数组中每一行的平均值的。 语法:rowMeans(data) 参数: 数据:数据框、数组或矩阵 例子1 # R program to illustrate# rowMean function# Create example values# Set seedset.seed(1234)# Create example datadata<-data.frame(matrix(round(r...
1. > help("apply")apply package:base R Documentation Apply Functions Over Array Margins Description: Returns a vector or array or list of values obtained by applying a function to margins of an array or matrix. Usage: apply(X, MARGIN, FUN, ...) Arguments: X: an array, including a mat...
百度试题 题目 In the song, "it's a long way to go, a hard row to hoe" means growing up is a __ process. A.satisfyingB.boringC.difficultD.miserable 相关知识点: 试题来源: 解析 C 反馈 收藏
than food plants like beans.This means it can grow in the desert (沙漠).In which ways could this plant help us?Deserts are becoming larger because the Earth's climate (气候)changes a lot.As a (6)r esult,growing plants in the desert will be more and more import...
Mattsson, Mats E.Lindelow, Claes-goranMaxe, Sven-erikUSUS3747090 * 1971年6月30日 1973年7月17日 Svenska Dataregister Ab Counting machine having means to prevent operation when more than oneor no keys are depressed in the same key row...
measurement implies a 3rd reference frame or quantity involved, such as basis vectors are reference frame of vectors in vector space to measure/weight vectors; coordinate system are reference frame of objects in that coordinate system. metric however, only means how to gauge the distance between ...