Cascade Historian: Version 4.1
Prev |  | Next

# latest

latest -- gives the latest value in a history.

## Syntax

    (latest history)

## Parameters

`history`

  The name of a history defined by the history command.

## Returns

The value and system time in the following format:

        (latest history data seconds)

if successful, where `data` and `seconds` are real values. Otherwise

        (error "No data for point history")
        (error "History history does not exist")

## Description

This command returns the value for the last data item in the history. This item may be either in a file or in memory.

This command corresponds to the Cogent API function `HI_Latest` and the `hist_latest` dynamic library function.

## Example

        [sh]$ lsend Hist
        Hist> (latest p3)
        (latest p3 38.2 973636953.463209)
        Hist>

Prev | Home | Next
interpolatorList | Up | length

Copyright 1995-2002 by Cogent Real-Time Systems, Inc.