| overlaying arrow plots [message #51011] |
Wed, 01 November 2006 05:24 |
rkombiyil
Messages: 59
Registered: March 2006
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Dear All,
I started using IDL more only recently. So please be kind :-) I have
made arrow plots from a 1D timeseries using one_arrow, which in turn
calls one_ray. I want to be able to overlay these vector plots on maps
and regular x-y plots of the timeseries/other derived quantities.
I make the call to one_arrow after I plot the timeseries. The
postscript file I generated had only the timeseries plot and the arrows
were not plotted. However, I could overlay the 1D vector plot in the
plot window. Is this a problem with different coordinates(device/data?)
The call to one_arrow has the following arguments -
xcen,ycen,angle,label,charsize
where xcen, ycen = starting point of arrow in device coordinates,
floating point scalars.
I used convert_coord to convert the time indices (1sec
data-1,2,3,4,....etc.) to device coordinates and kept the second
coordinate, a constant. How can I overlay the arrowplots created from
the 1D timeseries on the same 'postscript' plot with the time series
and on a map projection? And is there a better way to tackle such
problems?
I don't know if it's been discussed before. I tried to read old posts,
but were mostly about velovect.
Any suggestions/help much appreciated.
tia,
~rk
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