CHOOSEROWS function in Excel to extract rows from array

Excel CHOOSEROWS function

The CHOOSEROWS function in Excel is used to extract the specified rows from an array or range.

The syntax is as follows:

Where:

Array (required) - the source array.

Row_num1 (required) - an integer representing the numeric index of the first row to return.

Row_num2, … (optional) - index numbers of additional rows to return.

Here's how the CHOOSEROWS function works in Excel 365:

How to use CHOOSEROWS function in Excel

To pull particular rows from a given array, construct a CHOOSEROWS formula in this way:

1. For array, you can supply a range of cells or an array of values driven by another formula.
2. For row_num, provide a positive or negative integer indicating which row to return. A positive number retrieves a corresponding row from the start of the array, a negative number - from the end of the array. Multiple row numbers can be provided individually in separate arguments or in one argument in the form of an array constant.

As a Excel dynamic array function, CHOOSEROWS handles arrays natively. You enter the formula in the upper-left cell of the destination range, and it automatically spills into as many columns and rows as needed. The result is a single dynamic array, also known as a spill range.

For example, to get rows 2, 4, 6, 8 and 10 from the range A4:D13, the formula is:

=CHOOSEROWS(A4:D13, 2, 4, 6, 8, 10)

Alternatively, you can use an array constant such as {2,4,6,8,10} or {2;4;6;8;10} to specify the desired rows:

=CHOOSEROWS(A4:D13, {2,4,6,8,10})

Or

=CHOOSEROWS(A4:D13, {2;4;6;8;10})

Another way to supply the row numbers is entering them in separate cells, and then using either the individual cell references for several row_num arguments or a range reference for a single row_num argument.

For example:

=CHOOSEROWS(A4:D13, F4, G4, H4)

=CHOOSEROWS(A4:D13, F4:H4)

An advantage of this approach is that it lets you extract any other rows by simply changing the numbers in the predefined cells without editing the formula itself.

Below we will discuss a few more CHOOSEROWS formula examples to handle more specific use cases.

Return rows from the end of an array

To quickly get the last N rows from a range, provide negative numbers for the row_num arguments. This will force the function to count rows from the end of the array.

For instance, to get the last 3 row from the range A4:D13, use this formula:

=CHOOSEROWS(A4:D13, -3, -2, -1)

The result will be a 3-row array where the rows appear in the same ordered as in the referred range.

To return the last 3 rows in the reverse order, from bottom to top, change the order of the row_num arguments like this:

=CHOOSEROWS(A4:D13, -1, -2, -3)

Extract every other row from an array in Excel

To get every other row from a given range, use CHOOSEROWS in combination with a few other functions. The formula will slightly vary depending on whether you are extracting odd or even rows.

To return odd rows such as 1, 3, 5, … the formula takes this form:

=CHOOSEROWS(A4:D13, SEQUENCE(ROUNDUP(ROWS(A4:D13)/2, 0), 1, 1, 2))

To return even rows such as 2, 4, 6, … the formula goes as follows:

=CHOOSEROWS(A4:D13, SEQUENCE(ROUNDDOWN(ROWS(A4:D13)/2, 0), 1, 2, 2))

How this formula works:

In essence, the CHOOSEROWS function returns rows based on an array of sequential odd or even numbers generated by the SEQUENCE function. A detailed formula break-down follows below.

Firstly, you determine how many rows to return. For this, you employ the ROWS function to get the total number of rows in the referenced array, which you divide by 2, and then round the quotient upward or downward to the integer with the help of ROUNDUP or ROUNDDOWN. As this number will later be served to the rows argument of SEQUENCE, rounding is needed to get an integer in case the source range contains an odd number of rows.

As our source range has an even number of rows (10) that is exactly divided by 2, both ROUNDUP(10/2, 0) and ROUNDDOWN(10/2, 0) return the same result, which is 5.

The returned number is served to the SEQUENCE function.

For odd rows:

SEQUENCE(5, 1, 1, 2)

For even rows:

SEQUENCE(5, 1, 2, 2)

The SEQUENCE formula above produces an array of numbers consisting of 5 rows and 1 column, starting at 1 for odd rows (at 2 for even rows), and incremented by 2.

For odd rows, we get this array:

{1;3;5;7;9}

For even rows, we get this one:

{2;4;6;8;10}

The generated array goes to the row_num1 argument of CHOOSEROWS, and you get the desired result:

=CHOOSEROWS(A4:D13, {1;3;5;7;9})

Reverse the order of rows in an array

To flip an array vertically from top to bottom, you can also use the CHOOSEROWS and SEQUENCE functions together. For example:

=CHOOSEROWS(A4:D13, SEQUENCE(ROWS(A4:D13))*-1)

In this formula, we set only the first argument (rows) of SEQUENCE, which equals the total number of rows in the initial array ROWS(A4:D13). The omitted arguments (columns, start, step) default to 1. As a result, SEQUENCE produces an array of sequential numbers such as 1, 2, 3, …, n, where n is the last row in the source array. To make CHOOSEROWS count rows in the down-up direction, the generated sequence is multiplied by -1, so the row_num argument gets an array of negative numbers such as {-1;-2;-3;-4;-5;-6;-7;-8;-9;-10}.

As a result, the order of items in each column is changed from top to bottom:

Extract rows from multiple arrays

To get specific rows from two or more non-contiguous ranges, you first combine them using the VSTACK function, and then pass the merged range to CHOOSEROWS.

For example, to extract the first two rows from the range A4:D8 and the last two rows from the range A12:D16, use this formula:

=CHOOSEROWS(VSTACK(A4:D8, A12:D16), 1, 2, -2, -1)

Get rows based on a string containing row numbers

This example shows how to return particular rows by extracting the numbers from an alpha-numeric string.

Suppose you have comma-separated numbers in cell G3 listing the rows of interest. To extract the row numbers from a string, use the TEXTSPLIT function that can split a text string by a given delimiter (comma in our case):

=TEXTSPLIT(G3, ",")

The result is an array of text values such as {"3","5","7","10"}. To convert it to an array of numbers, perform any math operation that does not change the values, say +0 or *1.

=TEXTSPLIT(G3, ",") *1

This produces the numeric array constant {3,5,7,10} that the CHOOSEROWS function needs, so you embed the TEXTSPLIT formula in the 2^nd argument:

=CHOOSEROWS(A4:D13, TEXTSPLIT(G3, ",") *1)

As a result, all the specified rows are returned as a single array:

CHOOSEROWS function not working

If the CHOOSEROWS formula results in an error, it's most likely to be one of these reasons.

Practice workbook for download

Excel CHOOSEROWS formula - examples (.xlsx file)