Re: negative value for a db

Nevermind my last post i had the wrong rrd-ds-type
Thanks everyone for the help it looks like it works now
John

John Hutchinson wrote:
> i put this in my default and now i am getting .74 for a -74
>
> John
>
> Chris Adams wrote:
>> Once upon a time, John Hutchinson <[email protected]> said:
>>  
>>> I am trying to monitor a radio that returns a db reading in a 
>>> negative number can someone help me in how to tell cricket collector 
>>> to multiply the number by -1 before  passing it to rrd so that it 
>>> can be shown on the graph?
>>>     
>>
>> You can't really modify the number before it is stored, but you can
>> modify it before graphing.  For the datasource, you should have an entry
>> in the graph dictionary, and you can specify operations there like:
>>
>> graph    RSSIfrAP
>>     scale    = -1,*
>>
>> The "scale" entry is an RPN operation to apply to the data before
>> graphing.
>>
>> If you really want to have a modified value stored, I think the only way
>> currently to do that is to store the unmodified value and then make a
>> COMPUTE datasource that does the modification (but that's overly
>> complicated for what you are doing).
>>
>>   
>


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