[rrd-users] Re: printing variables

[Alex van den Bogaerdt]

Gil Coutinho wrote:

> I have the a problem with printing some data on the bottom of my graphs.
> I want to make a tabular view like this:
> 
>         Last    Max     Min
> Var 1:  3.2     5.6     2.0
> Var 2:  4.5     6.0     2.4
> 
> (and so on; I trust you are using a monotype font)
> 
> The problem is with the %lf precision.
> I can use %.1lf to limit the number of decimal spaces after the dot, but i
> can't seem to specify the number o digits on the left of the dot.
> This way, if the value grows to 10, I get my table desaligned.

%X,Ylf  where X is the total field width and Y is the number of digits
after the decimal point.

So, if you need to be able to print "123456789012.12" the total
field width needs to be 15 (12 digits before and 2 digits after
the decimal point, 12+1+2==15) and the string to use is "%15.2lf".

HTH
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