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...
"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...
I’ve been scouring the web, the bookshelves, and my scattered brain for all the Seussical fun I could find for my little people and yours. Here are a few of my finds…Seuss-ified~Craft-astic~Snack-errific~Education-cool~Fun! Parenting choices strongly impact the level and type of attach...
Error: could not find function "packageversion"> > > - sessionInfo()Error in -sessionInfo() : invalid argument to unary operator> - packageversion("utils")Error: could not find function "packageversion"> Obs: Before I had done the installation of the two packages that you quoted. ...
# The transform function produces a data frame # so if you use it then save the result to 'yo'! # OR you can figure out another way to create the # variable. # DO NOT ALTER THE CODE BELOW THIS LINE # === yo <- read.csv('yogurt.csv') # ENTER YOUR CODE BELOW THIS LINE # ...
great answer, just one more tiny reminder : do not put any variables other thanidandtimein your data frame,meltcould not tell what you want to do in this case. –Jia Gao CommentedOct 19, 2017 at 11:11 1 @JasonGoal Could you elaborate on that? As I'm interpreting you comment, it ...
when I try to run the ggplot line, it returned an error: could not find function ".". I realized that I did not have dplyr installed/loaded, so I did that. Then I played around a lot and ending up coming up with: library(ggplot2) library(reshape2) library(dply...
you will find the tidyr package easier to use than the reshape2 package. Both packages can get the job done. An Introduction to reshape2by Sean Anderson Converting Between Long and Wide Format Melt Data Frames 7) Reshaping Data library(reshape2) ...
The table below tallies all function calls to all packages ('ncalls'), both internal (r-base + recommended, along with the package itself), and external (imported and suggested packages). 'NA' values indicate packages to which no identified calls to R functions could be found. Note that ...
They are not needed to start or stop the vehicle. The horse provides motive power and brakes will stop the carriage when necessary. A carriage without springs could still function, as springs do not serve any absolutely necessary task. They do not light the way at night like lanterns do, ...