R help - Nov 2008 - relabeling the x-axis of a plot with discontinuous timestamps

Hi all,

I have two vectors of data:

The first vector contains timestamps (as integers), however the
difference between these dates varies. For instance, the vector can be
c(0, 5 , 10, 20, 25, 30) so that there is a "jump" between the third
and
the fourth element.

The second vector contains the associated values that I want to plot
against these timestamps.

My problem is that I can't figure out how to label the x-axis with
timestamps that are not continuous but have jumps, as in the example
above. I tried relabeling the x-axis and using ts objects, but these
approaches seem to require continuous time series.

I appreciate any hint.

Best,
Jochen

Stoesser, Jochen wrote:
> Hi all,
> 
> I have two vectors of data:
> 
> The first vector contains timestamps (as integers), however the
> difference between these dates varies. For instance, the vector can be
> c(0, 5 , 10, 20, 25, 30) so that there is a "jump" between the
third and
> the fourth element.

If these are integers (and no kind of date or time objects), then you 
may want to suppress the x axis at first (argument xaxt="n") and at it
later on by using

axis(1, at= c(0, 5, 10, 20, 25, 30), labels= c(0, 5, 10, 20, 25, 30))

Uwe Ligges


> The second vector contains the associated values that I want to plot
> against these timestamps.
> 
> My problem is that I can't figure out how to label the x-axis with
> timestamps that are not continuous but have jumps, as in the example
> above. I tried relabeling the x-axis and using ts objects, but these
> approaches seem to require continuous time series.
> 
> I appreciate any hint.
> 
> Best,
> Jochen
> 
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