# Create a list containing a vector, a matrix and a list. list_data <- list(c("Jan","Feb","Mar"), matrix(c(3,9,5,1,-2,8), nrow=2), list("green",12.3)) # Give names to the elements in the list. names(list_data) <- c("1st Quarter", "A_Matrix", "A Inner list")...
Example 2 explains how to adequately convert a list to a numeric vector in R. Have a look at the following R code: as.numeric(unlist(my_list))# Apply unlist & as.numeric# 1 2 3 5 10 11 12 13 14 15 As you have seen, we used a combination of theunlistand as.numeric functions,...
Convert Matrix to List of Column Vectors: l = split(x, rep(1:ncol(x), each = nrow(x))): Uses the split function to convert the matrix x into a list of column-vectors. rep(1:ncol(x), each = nrow(x)) creates a vector that specifies how to split the matrix by columns, where...
[3]如果你的数据是list,list中元素有名称,实际上跟python的中dictionary没什么区别,可以使用names索引元素,可以使用代码转化,如下: def as_dict(vector): """Convert an RPy2 ListVector to a Python dict""" result = {} for i, name in enumerate(vector.names): if isinstance(vector[i], robjects.List...
df <- as.data.frame(list_1, col.names = c("a", "b")) print(df) Output a b 1 41 44 2 42 45 3 43 46 If the vectors in list are named vectors, then these would be overridden by thecol.namesvector. Conclusion In thisR Tutorial, we learned to convert a List to an R Data...
vector to a factor; this a feature which is#occasionally useful, but is also sometimes excessive. Here, for example, the#subject_name fild is definitely not categorical data; names are not categories#of values. Therefore, setting the stringsAsFactors option to FALSE allows us to#convert to ...
Example 2: Convert Data Frame Column to Vector by Subsetting Data Example 3: Convert Data Frame Column to Vector with pull Function [dplyr Package] Video, Further Resources & Summary Let’s start right away: Creation of Example Data
如果mode是any,则is.vector将会对原生模式,列表,表达式都返回T,只要含有除了names属性外的其他属性就返回F。 as.vector()将去除原生类型中的所有属性(包括names),但list和expression不会 Note that factors are not vectors; is.vector returns FALSE and as.vector converts a factor to a character vector for ...
She uses dbplyr, so she has little control over the underlying query and is eventually just calling collect() to bring the data frame into R. It's mostly a problem when you start using it like a character vector with other parts of the tidyverse, like: x <- structure(c("sad", "ok...
"""Convert an RPy2 ListVector to a Python dict""" result = {} for i, name in enumerate(vector.names): if isinstance(vector[i], robjects.ListVector): result[name] = as_dict(vector[i]) elif len(vector[i]) == 1: result[name] = vector[i][0] ...