R for marine microbiology

How to assign a new object in R?

• <-

• -<

• %<>%

• %>%

What are the basic data types in R programming?

• float, string, boolean, integer, complex, binary
• number, text, boolean, int, complex, binary
• numeric, character, logical, integer, complex, raw
• float, char, bool, int, complex, binary

data<- (a)   ("file.csv", col_names=F)

what function can be used to apply a Function over a List or Vector ?

• zapply()

• lapply()

• applylist()

• vector.do()

Please filter the column "Group" of the dataset "data" excluding all the row belonging to the group called "outlier"

(a)  

How can you calculate the correlation coefficient in R programming?

• correlation()
• corr()
• correlation_coefficient()
• cor()

What function can be used in R to group by one or more columns ?

• group()

• grouping()

• grouping_by()

• group_by()

How can you rename a column in a data frame in R programming?

• df.column_rename(old_column_name, new_column_name)

• df.rename(old_column_name, new_column_name)

• df.rename_column(old_column_name, new_column_name)

• colnames(df)[old_column_index] <- new_column_name

Select the first column of a dataframe in R programming

• df[,1]

• df[,0]
• df[1,]

• df[1]

What is the most used R package for chart creation?

• ggplot2
• plotly
• seaborn
• matplotlib