# XOFFSET

## Purpose:

Returns the x offset of a series or table.

## Syntax:

XOFFSET(series)

series |
- |
Optional. A series or table. Defaults to the
current Window. |

## Returns:

A real.

## Example:

xoffset(gsin(20,.05))

returns 0.0, the offset of the series.

## Example:

W1: gsin(20, .05)

W2: extract(w1, -10, -1)

xoffset(w2)

returns –0.55, the
offset produced by extracting the data prior to the first sample.

## Remarks:

When referencing a table, XOFFSET returns
the x offset of the first column in the table.

Many series have X values that are monotonically rising by a constant
X increment such that:

A series with X values of this form is
referred to as an interval series.
Because any X value from an interval series can be computed with:

an interval series requires only the DELTAX and XOFFSET values to determine
the X values. Thus, for an interval series, explicit X values are not
necessary, decreasing the data storage requirements by a factor of 2.
Also, because the X values for an interval series are regularly monotonic,
speed optimizations for plotting and computations are available.

See XY to create
a series with irregularly spaced X values.

## See Also:

DELTAX

DELTAY

RATE

SETDELTAX

SETDELTAY

SETXOFFSET

SETYOFFSET

XY

YOFFSET