
11202.WedCh09_240327
Authored by Ys Huang
Computers
12th Grade
Used 9+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
對於prop.table(table1),何者正確?
計算出table1的個別機率
計算出table1的總和機率
計算出table的個別機率
計算出table的總和機率
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
輸入rbind(first,second)以下何者正確?
以first檔案為主體,將second由左往右結合
以first檔案為主體,將second由下往上結合
以second檔案為主體,將first由左往右結合
以second檔案為主體,將first由下往上結合
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
addmargins(table1)是個怎麼樣的指令?
針對table1的ROW額外增加邊際運算得出總和
針對table1的COLUMN額外增加邊際運算得出總和
不對table1的ROW和COLUMN額外增加邊際運算得出總和
針對table1的ROW和COLUMN額外增加邊際運算得出總和
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
輸入cbind(first,second)以下何者正確?
以first檔案為主體,將second由左往右結合
以first檔案為主體,將second由下往上結合
以second檔案為主體,將first由左往右結合
以second檔案為主體,將first由下往上結合
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Coffee定義為data.frame(ID=c(1:2), gender=c('M','F'), age=c(26,23), income=c(3000,2300)),我們對其使用melt(Coffee, id.vars=c('ID','gender')),不應該得到下列何者?
ID欄位總共有4排
Gender總共有4排
Income總共有5排
針對ID和Gender對資料集調整
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
使用merge(grade,information,by='name'),以下何者正確?
把grade和information合併,合併的方式為成績
把grade和information合併,合併的方式為資訊
把grade和information合併,合併的方式為名字
把grade和information合併,合併的方式很隨意
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
定義矩陣為matrix(2:12,3),我們將得到以下何者結果?
12個元素,ROW數為三
11個元素,ROW數為三
12個元素,COLUMN數為三
11個元素,COLUMN數為三
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