Web1 day ago · "$" 操作符是 R 语言中用于访问数据框 (data frame) 中的列的常用操作符。但是,原子向量 (atomic vector) 是 R 中的一种基本数据类型,它是一个长度固定的向量,并且所有元素都是相同的数据类型。因此,在对原子向量使用 "$" 操作符时是无效的,因为原子向量 … Web关于function:R’data’的问题必须是向量类型,为’NULL’ function null r problem with R 'data' must be of a vector type, was 'NULL' 我创建了这个功能: 如果我使用这种输入: 1 2 iv=c ( …
R语言里出现 `y` must be a vector, not NULL.是怎么回事? …
Error in FUN(X[[i]], ...) : 'data' must be of a vector type, was 'NULL' To fix the above error, we can simply remove the blank elements in our list by running code that subsets the list by elements that only have a length greater than zero, like this: mylist <- mylist[lapply(mylist,length)>0] Web3.6 Data frames and tibbles. 3.6.1 Creating. 3.6.2 Row names. 3.6.4 Subsetting. 3.6.6 List columns. 3.6.7 Matrix and data frame columns. 3.7 NULL. 3.1 Introduction. 测试:如果读者能准确回答如下几个问题,就可以跳过本章的学习。 What are the four common types of atomic vectors? What are the two rare types? What are ... btod bantam office chair
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WebJul 19, 2024 · R语言里出现 `y` must be a vector, not NULL.是怎么回事? r语言 我在做几十个变量的相关分析,想用corrplot ()函数画相关系数矩阵图,结果每次输出都有这个报错。 因为原来的数据里有负数,于是我把原数据里的负数全部都改了(负数无实际意义只是为了区分),结果输出还是报错,就不太清楚怎么回事。 。 。 图一是我用corr.test ()函数分析的 … WebNov 1, 2024 · 数据必须为向量类型,为NULL - data must of vector type, was NULL. 2014-09-24 05:25:01 1 22526 r. geefirth 给出错误“矩阵中的错误(x $ id,ncol = 1):'数据'必须是 … WebR built-in command persp to visualize 2D density function; R library ggplot2 and command stat_density_2d{ggplot2} for contours of 2D density; R library plot3D and command persp3D{plot3D} for 3D plots; Command rmvnorm. rmvnorm{mvtnorm} is a random number generator for the multivariate normal distribution with mean vector mean and covariance ... btod bantam chair