Indexing the Data Frame
To access the particular data in the Data Frame use square brackets and specify the column name or row numbers, and column numbers to fetch. Let’s look into the syntaxes of different ways of indexing a data frame.
# fetching the data in particular column data["columnName"] # fetching data of specified rows and # columns data[ fromRow : toRow , columnNumber] # fetches first row to third row # and second column Eg:- data[1:3,2]
Example:
In the below code we created a data frame and performed indexing on it by fetching the data in the specified rows and particular columns.
R
# create a data frame stats <- data.frame(player=c('A', 'B', 'C', 'D'), runs=c(100, 200, 408, NA), wickets=c(17, 20, NA, 5)) print("stats Dataframe") stats # fetch data in certain column stats["player"] print("----------") # fetch certain rows and columns stats[1:3,2] |
Output
"stats Dataframe" player runs wickets 1 A 100 17 2 B 200 20 3 C 408 NA 4 D NA 5 ---------- player 1 A 2 B 3 C 4 D ---------- 100 200 408
How to create, index and modify Data Frame in R?
In this article, we will discuss how to create a Data frame, index, and modify the data frame in the R programming language.
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