plot/vs ?

[Dongxiao Zhang <dzhang@xxxxxxxxxxxxxxxxxxxx>]

Hi, every one.

I have a time series in a plot. The x axis is in time units from Sept.
1994 to June 1996, y axis is Sv, the value of transport. Now, I want to
plot over a symbol, corresponding to a shipboard data for a specific time,
let's say 24-dec-1994:00:00:00. 

I thought
plot/over/vs/sym=20 tt(time value for 24-dec-1994),22(value for ADCP data)
should work. But it failed, the reason could be I have no way to get a
correct value of tt(?). I tried to use time index like L and time value
relative to the time axis of that time series, both failed.

Can somebody help me?

Best regards,

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Dongxiao Zhang
Division of Meteorology and Physical Oceanography
Rosenstiel School of Marine and Atmospheric Science
4600 Rickenbacker Causeway
Miami, FL 33149
Phone  : (305)361-4806
Fax    : (305)361-4696
Office : MSC Room 309
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