[rrd-users] rpn equation

[Simon Hobson]

R Dicaire wrote:

>If I read the rpn docs correctly the following equation should
>evaluate as (a + b) * 10000
>
>CDEF:ices=icecast,vicecast,+,10000,*
>
>If this is correct, previous values for icecast arent being displayed
>in the graph, but ARE displayed when called by
>
>CDEF:ices=icecast,10000,*
>
>Any ideas?

Does vicecast have a value when this equation fails ? If it's not 
defined, then you have "something + nan" which has a result of nan.

If that is the case, tehn you can use an "if" expression to set it to 
zero instead.

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Simon Hobson

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