[rrd-users] Fw: Aw: Re: Empty sections in AREA on graph, but values in database

[Alex van den Bogaerdt]

----- Original Message ----- 
From: "Thomas Brinkmann" <thomas.brinkmann at email.de>
To: "list rrdtool" <rrd-users at lists.oetiker.ch>
Sent: Wednesday, August 27, 2014 12:00 PM
Subject: [rrd-users] Fw: Aw: Re: Empty sections in AREA on graph, but values 
in database

> > Try adding: CDEF:stufe_debug=stufe,UN,75,stufe,IF
>
> -  I have removed alles DEFs and CDEF as mentioned and then added the
> - DEF:stufe_debug=stufe,UN,75,stufe,IF

???????
Does this even seem to work?

It clearly is not what I suggested to do as a next debugging step.
I suggested to make a CDEF, not a DEF.

> - the line then draws at 75 - so there must be unknown data?
> - GPRINT stufe_debug is 75.000000

IF A then B else C.
A is set to: {stufe,UN} which returns true if stufe is unknown.
B is set to 75, which is returned if A is true

If the entire line is at 75, then stufe is unknown during the entire time.

> CDEF:stufe_debug=10,stufe,25,*,stufe,1,EQ,stufe,2,EQ,stufe,3,EQ,stufe,0,EQ,+,+,+,IF
> (by the way: everything is untested, you make it work should changes be
> required)

I got the order wrong.
CDEF:stufe_debug=stufe,1,EQ,stufe,2,EQ,stufe,3,EQ,stufe,0,EQ,+,+,+,10,stufe,25,*,IF