WebbR 将字符数组写入表,r,transpose,sapply,R,Transpose,Sapply,我想转换最后一个命令给出的输出，并将其写入data.frame。 我希望数据框有两列。 第一列将具有列名，第二列将具有每行中该列的数据类型。 http://www.intro2r.info/unit3/swirl/vapply_and_tapply

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WebbQ: Why is using sapply() to get the class() of each element in a data frame dangerous? A: Columns of data.frames might have more than one class, so the class of sapply()’s … WebbConvert Data Frame Column to Numeric in R (2 Examples) Change Factor, Character & Integer . In this R tutorial, I’ll explain how to convert a data frame column to numeric in … chef tasting

R语言 在shiny中通过下拉选择编辑数据表(适用于DT v0.19)

WebbTable 1: Example Data Frame with Different Variable Classes. With the following R code, you are able to recode all variables – no matter which variable class – of a data frame to … WebbFirst, we have to create a vector containing the column names of all variables that we want to convert: change_columns <- c ("x1", "x3") # Specify columns to change. Next, we can … WebbOutput: Note that since our expectation was correct (i.e. character(1)), the vapply() result is identical to the sapply() result -- a character vector of column classes. - Class: text … fleetwood webcam