# UNRAVEL

## Purpose:

Create a single vector from the columns of a table.

## Syntax:

UNRAVEL(a)

## Returns:

A series.

## Example:

W1: rand(10, 3)

W2: unravel(w1)

W1 contains a 10x3 array of random values. W2 contains a single 30 point series that is constructed by appending the rows of W1.

If W1 contains a 3 by 3 table, this expression returns a series with 9 observations; the elements of column 1 of W1, followed by the elements of column 2 of W1, followed by the elements of the last column of W1.

## Example:

a = {{1, 2, 3},

{4, 5, 6},

{7, 8, 9}};

b = unravel(a);

b == {1, 2, 3, 4, 5, 6, 7, 8, 9}

Variable a is a 3X3 array. Variable b is a 9x1 series constructed by appending the rows of a.

## Remarks:

The A[..] syntax is equivalent to unravel(A). For example:

a = rand(10);

b = unravel(a);

c = a[..];

b == c

## See Also:

CONCAT

MERGE

RAVEL

UNMERGE