| Re: printing without a return [message #2973 is a reply to message #2967] |
Tue, 18 October 1994 17:47  |
landsman
Messages: 93
Registered: August 1991
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Member |
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In article <CxvxIF.EqC@hpl.hp.com>, peter@hpl.hp.com (Peter Webb) writes...
> Does anybody know of a way to overprint in IDL? That is, I want to
> print out a value, then back up to the first column on the same line and
> print over the value. The more obvious FORMAT statements don't seem to
> do the trick (with $ you can prevent the linefeed, but you can't back up
Before IDL V3.6, one could overwrite a line in IDL using a carriage return
(=string("15b)) and a "$" in the format statement, as in the following
pro testb
cr = string("15b)
for i=0,20 do begin
print,i,cr,f='($,i6,a)' & wait,0.2
endfor
But in IDL V3.6, the above code no longer works and one has to place the
carriage return at the *beginning* of the line.
for i=0,20 do begin
print,cr,i,f='($,a,i6)' & wait,0.2
endfor
Note that the procedure RDPIX in the standard IDL User's library needs the
above fix in V3.6. The above statements apply to VMS and Unix. I know
the first method above didn't work for Mac IDL V3.5 -- I haven't installed
V3.6 on the Mac yet to see what happens.
--Wayne Landsman landsman@stars.gsfc.nasa.gov
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