v1 <- gtcars %>% dplyr::slice_head(n = 1, by = year) %>% dplyr::arrange(year) v2 <- gtcars %>% dplyr::group_by(year) %>% dplyr::slice_head(n = 1) %>% dplyr::ungroup() all.equal(v1, v2) #> [1] "Attributes: < Length mismatch: comparison on first 2 components >...
Windows系统:https://mirrors.tuna.tsinghua.edu.cn/CRAN/bin/windows/base/R-3.6.2-win.exe 下载好之后一路安装即可。 Windows 用户:安装 Rtools:Windows 构建工具 Windows 用户需要安装这个工具:https://mirrors.tuna.tsinghua.edu.cn/CRAN/bin/windows/Rtools/Rtools35.exe Mac 用户:安装 XQuartz 官网下载(...
Last year, we started an informal “data science hangout” for the data science community to connect and chat about some of the more human-centric questions around data science leadership. These happen every Thursday at 12 ET with a different leader featured each week. The conversation is all ...
2])#加载dplyr包library(dplyr)#把每个月的index值相加得出该月份的总index值df<-df%>%group_by(ye...
*We provide financial statements by following US GAAP, IFRS and related financial reporting guidelines. Bookkeeping & Financial Reporting Month-End/Qtr-End/Year-End Close Revenue Accounting Bill Pay & Accounts Payable Invoicing & Accounts Receivable ...
Academy has been in beta for over a year and has helped many organizations raise the data science skill level of their teams. Move beyond facts to acquire real-life skills Facts, such as statistical function names, make up the foundation of most learning experiences. Facts can be learned by...
create_group(...) Used to create a group for a course. TheGroup namevariable should be set to something like "school-courseid-year". This creates the group and adds students as, for example,reporterswith read-only access on GitLab. Make sure to specify avalid permission number. ...
is.na(delay)) %>% collect ggplot(delay, aes(dist, delay)) + geom_point(aes(size = count), alpha = 1/2) + geom_smooth() + scale_size_area(max_size = 2) # window functions batting_tbl %>% select(playerID, yearID, teamID, G, AB:H) %>% group_by(playerID) %>% filte...
Mine Cetinkaya-Rundel talked about last year’s first Shiny Contest. For those who don’t know, this was a contest created by RStudio and hosted on RStudio Community for creating the best Shiny apps. You can check out all of last year’s (and soon this year’s) submissions from the ...
I am heading home from my third year of attending rstudio::conf! If you weren’t there, watch for the videos to be released so you can check out the talks; I know I will do the same so I can see the talks I was forced to miss by scheduling constraints. I love this conference,...