| 題庫總數：20 | ||
| 是非題：0 | ||
| 選擇題：20 (A：5、B：5、C：4、D：6) | ||
| 多選題：0 | ||
| roddayeye整理 | ||
| Q | 取得工作目錄的R函數為何? | |
| 1. setwd | ||
| 2. working | ||
| 3. getworking | ||
| v | 4. getwd | |
| Q | tidyr 套件中,將寬資料轉換為長資料的R函數為何? | |
| v | 1. gather | |
| 2. spread | ||
| 3. melt | ||
| 4. dcast | ||
| Q | 散佈圖矩陣(scatter plot matrix)的R函數為何? | |
| 1. scattermatrix | ||
| 2. scatterplot | ||
| 3. matrixplot | ||
| v | 4. pairs | |
| Q | 顯示資料欄位名稱的R函數為何? | |
| 1. name | ||
| v | 2. names | |
| 3. attribute | ||
| 4. field | ||
| Q | 儲存RData檔案的R函數為何? | |
| 1. write | ||
| 2. load | ||
| 3. write.table | ||
| v | 4. save | |
| Q | 安裝套件的R函數為何? | |
| 1. execute.packages | ||
| 2. load.packages | ||
| v | 3. install.packages | |
| 4. library.packages | ||
| Q | 計算二個變數之相關係數的R函數為何? | |
| 1. relation | ||
| v | 2. cor | |
| 3. var | ||
| 4. sd | ||
| Q | 計算類別型變數出現次數小計的R函數為何? | |
| 1. sum | ||
| v | 2. total | |
| 3. count | ||
| 4. mean | ||
| Q | 計算資料百分位數的R函數為何? | |
| v | 1. quantile | |
| 2. percent | ||
| 3. sum | ||
| 4. median | ||
| Q | 高階繪圖的R函數為何? | |
| 1. draw | ||
| 2. picture | ||
| 3. plots | ||
| v | 4. plot | |
| Q | reshape2 套件中,將長資料轉換為寬資料的R函數為何? | |
| 1. gather | ||
| 2. spread | ||
| 3. melt | ||
| v | 4. dcast | |
| Q | 建立mydata資料物件「mydata <- data.frame(編號=c(1:3), 姓名=c("RWEPA", "LEE", "JOHN"), 縣市別=c("台北市", "新北市", "台北市"))」, 計算資料摘要的R指令? | |
| 1. sum(mydata) | ||
| 2. table(mydata) | ||
| v | 3. summary(mydata) | |
| 4. analysis(mydata) | ||
| Q | 將資料利用read.table 匯入至R其預設資料物件為何? | |
| 1. matrix | ||
| v | 2. data frame | |
| 3. array | ||
| 4. vector | ||
| Q | 設定工作目錄的R函數為何? | |
| v | 1. setwd | |
| 2. working | ||
| 3. setworking | ||
| 4. getwd | ||
| Q | 下列何者是R所提供的功能? | |
| 1. 統計分析 | ||
| 2. 繪圖 | ||
| 3. 資料視覺化 | ||
| v | 4. 以上皆是 | |
| Q | R程式「m <- matrix(c(1:8), ncol=2);apply(m, 1, function(x) mean(x))」,其結果為何? | |
| 1. 1 2 3 4 | ||
| 2. 2 3 4 5 | ||
| v | 3. 3 4 5 6 | |
| 4. 4 5 6 7 | ||
| Q | 群組計算的R函數為何? | |
| v | 1. aggregate | |
| 2. groupsum | ||
| 3. groupcount | ||
| 4. aggregation | ||
| Q | 計算標準差的R函數為何? | |
| 1. standarddiff | ||
| 2. stdiff | ||
| v | 3. sd | |
| 4. sdifference | ||
| Q | 建立mydata資料物件「mydata <- data.frame(編號=c(1:3), 姓名=c("RWEPA", "LEE", "JOHN"), 縣市別=c("台北市", "新北市", "台北市"))」, 建立資料為1的「等級」欄位的R指令? | |
| 1. mydata#等級 <- 1 | ||
| v | 2. mydata$等級 <- 1 | |
| 3. mydata@等級 <- 1 | ||
| 4. mydata^等級 <- 1 | ||
| Q | data.table 套件中匯入資料的R函數為何? | |
| v | 1. fread | |
| 2. read.data | ||
| 3. read.datatable | ||
| 4. read.table | ||
文章標籤
全站熱搜
留言列表