An errorbar plot may be a good fit for your problem, but many of the other plot 
types will allow you to plot an irregular x scale as well. 
That just comes down to formatting your data correctly eg: 

'hilo' plot t;h,:l
plot t;h,:l
'marker' plot t;h,:l
'symbol' plot t;h,:l

> -----Original Message-----
> From: [email protected] [mailto:programming-
> [email protected]] On Behalf Of David Vincent-Jones
> Sent: Saturday, 14 February 2009 08:00
> To: Programming forum
> Subject: Re: [Jprogramming] Variable Time Plot
> 
> You are right .. errorbar does appear to solve the problem
> 
> Thanks a bunch
> 
> On Fri, 2009-02-13 at 18:46 +0100, Aai wrote:
> > h=: 3  4  7  18   15   12    9    8    7  NB. high level
> > l=:1  2  5  13   10    8    7    6    5  NB. low level
> > t=:0  1  2   3  3.3  3.6  4.6  5.6  6.6  NB. logged time
> >
> > 'errorbar' plot t;<h,(-:h+l),:l
> 
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