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Prepare better with the best interview questions and answers, and walk away with top interview tips. These interview questions and answers will boost your core interview skills and help you perform better. Be smarter with every interview.

- 4.6 Rating
- 39 Question(s)
- 50 Mins of Read
- 9854 Reader(s)

**matplot(x, cbind(y1,y2))** where x, y1,y2 are vectors or columns of a matrix or dataframe. Example as shown below where X is the vector from 1 to 8 and Y1 and Y2 are functions of X.

Stacking vectors concatenates multiple vectors into a single vector along with a factor indicating where each observation originated. Unstacking reverses this operation.

**Example: **

**() **is the function used to convert list into vector for arithmetic manipulation on the elements.

**. **read.delim() function reads a file into list. read.delim() is almost the same as read.table(), except the field separator is tab by default.

head(subset(airquality, Ozone > 28 & Temp > 70, select=c(Ozone, Temp)), 4)

subset(airquality, !is.na(Ozone))

head(subset(airquality, Month==5 & Day > 30, select= -Wind))

**): **The cumulative maximum value. Cumin(x): The cumulative minimum value. Cumprod(x): The cumulative product.

mapply(paste,1:3, 6:8, sep=letters[24:26])

**matplot(x, cbind(y1,y2))** where x, y1,y2 are vectors or columns of a matrix or dataframe. Example as shown below where X is the vector from 1 to 8 and Y1 and Y2 are functions of X.

Stacking vectors concatenates multiple vectors into a single vector along with a factor indicating where each observation originated. Unstacking reverses this operation.

**Example: **

**() **is the function used to convert list into vector for arithmetic manipulation on the elements.

**. **read.delim() function reads a file into list. read.delim() is almost the same as read.table(), except the field separator is tab by default.

head(subset(airquality, Ozone > 28 & Temp > 70, select=c(Ozone, Temp)), 4)

subset(airquality, !is.na(Ozone))

head(subset(airquality, Month==5 & Day > 30, select= -Wind))

**): **The cumulative maximum value. Cumin(x): The cumulative minimum value. Cumprod(x): The cumulative product.

mapply(paste,1:3, 6:8, sep=letters[24:26])

Prepare better with the best interview questions and answers, and walk away with top interview tips. These interview questions and answers will boost your core interview skills and help you perform better. Be smarter with every interview.

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