# How do I select specific rows in R?

## How do I select specific rows in R?

If you’d like to select multiple rows or columns, use a list of values, like this:

- students[c(1,3,4),] would select rows 1, 3 and 4,
- students[c(“stu1”, “stu2”),] would select rows named stu1 and stu2 .

## How do I extract a value from a Dataframe in R?

Extract data frame cell value

- Extract value of a single cell: df_name[x, y] , where x is the row number and y is the column number of a data frame called df_name .
- Extract the entire row: df_name[x, ] , where x is the row number.
- Extract the entire column: df_name[, y] where y is the column number.

**How do I subset a row in a Dataframe in R?**

So, to recap, here are 5 ways we can subset a data frame in R:

- Subset using brackets by extracting the rows and columns we want.
- Subset using brackets by omitting the rows and columns we don’t want.
- Subset using brackets in combination with the which() function and the %in% operator.
- Subset using the subset() function.

**How do you subset a Dataframe in R based on a vector?**

If we have a vector and a data frame, and the data frame has a column that contains the values similar as in the vector then we can create a subset of the data frame based on that vector. This can be done with the help of single square brackets and %in% operator.

### How do you extract values from a data frame?

- Loading the Dataset.
- Method 1: Extract Data using iloc or Indexing.
- Method 2: Extract Data using iat.
- Method 3: Extract Data using loc.
- Method 4: Extract Data using at.
- Method 5: Extract Data using data_frame.values[]
- Summary.

### How do I extract a subset of data in R?

Subset a Data Frame with Base R Extract[] To specify a logical expression for the rows parameter, use the standard R operators. If subsetting is done by only rows or only columns, then leave the other value blank. For example, to subset the d data frame only by rows, the general form reduces to d[rows,] .

**How do you subset data by value in R?**

6 Ways of Subsetting Data in R

- Subset Using Brackets by Selecting Rows and Columns.
- Subset Using Brackets by Excluding Rows and Columns.
- Subset Using Brackets with which() Function.
- Subset Data with subset() Function.
- Subset Data in Combination of select() and filter() Functions.
- Subset a Random Sample with sample() Function.