Error in medata(medium) : could not find function "medata" 请注意,函数cat()仅会在输入的日期格式类型不匹配"long"或"short"时执行。使用一个表达式来捕获用户的错误输入的参数值通常来说是一个好主意。(类似于Excel中的数据有效性功能) 有若干函数可以用来为函数添加错误捕获和纠正功能。你可以使用函数warni...
> #2、重铸 > dcast(md,ID~variable,mean) Error in vaggregate(.value = value, .group = overall, .fun = fun.aggregate, : could not find function ".fun" 此处出现错误,经求助,社群的同学王智博提醒我可能是mean之前赋值其他东西了,使用rm(mean)可解决问题。rm()意味将对象从某一环境中移除(remov...
"four", "five") # 创建一个字符串向量 > name(x) # 显示向量x的名字(其实就像是Excel中的表头) Error in name(x) : could not find function "name" > name(x) <- y # 将向量y作为向量x的名字 Error in name(x) <- y : could not find function "name<-" > names(x) # 显示向量x的名...
# One way to do this is using the transform # function. You can look up the function transform # and run the examples of code at the bottom of the # documentation to figure out what it does. # The transform function produces a data frame # so if you use it then save the result t...
to make function names verbs. Assignment Use <-, not = for assignment statements :R对象(R objects) 原始对象类型(Primitive Object Types) Basic vectors These are vectors containing a single type of value: integers, floating-point numbers, complex numbers, text, logical values, or raw data. ...
The problem seems to be with the write_dataset function from the arrow package, but I'm not sure why and what I could try to prevent R from Aborting. Any troubleshooting advice would be greatly appreciated! Thank you in advance! Component(s) REmily...
Notice, that could be any working Nonmem model as long as the provided simulation data set is sufficient to run it. We are ready to plot: library(ggplot2) datl <- as.data.table(simres) |> melt(measure.vars=cc(PRED,IPRED,Y)) ggplot(datl,aes(TIME,value,colour=variable))+ geom_lin...
Example 1: Reshape Data Frame with melt Function (reshape2 Package) Example 1 illustrates how to convert a data frame from wide to long structure with the melt function of thereshape2 package. Let’s install and load the package to R: ...
需求 我用ggplot2做了两幅图： 柱形图 library(ggplot2) df<-data.frame(x=LETTERS[1:10],y=...
Note that, since the data structure is also similar to a list, you could also use thelength()function to retrieve the number of columns. How to Access and Change a Data Frame’s Values There are two main ways in which you can access and change these values. In this section, you’ll...