dlog |

Difference functions for natural logarithm of series.

• First difference function for natural logarithm of the series.

Syntax: dlog(x)

x: series

Computes where is the lag operator.

• n-th order difference function for natural logarithm of series.

Syntax: dlog(x, n)

x: series

n: integer, series

Return: series

Computes for integer where is the lag operator.

If n is not an integer, the integer floor will be used.

• n-th order difference function for natural logarithm of series with an s-th seasonal difference.

Syntax: dlog(x, n, s)

x: series

n: integer, series

s: integer, series

Return: series

Computes for integer where is the lag operator.

If n or s are not integers, the integer floors and will be used.

These functions are panel aware.

Examples

show dlog(y,2)

is equivalent to d(log(y),2), the 2nd-order difference of the log of the series y.

Cross-references

See also
d.