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Re: Overwriting printings [message #20456 is a reply to message #20449]

Thu, 22 June 2000 00:00

Paul van Delst
Messages: 364
Registered: March 1997

Senior Member

dominik@astro.uva.nl wrote:
>
> In article <395214A5.BA0D21B1@mathstat.dal.ca>,
> simon@mathstat.dal.ca wrote:
>
>> Is there a way to get IDL to overwrite the previous print output,
>> ratherthan starting a new line? I'm running IDL in Linux..
>
> the `$' format character disables the automatic newline,
> the character control-k kill the current output line.
> Use something like this:
>
> for i=1,1000 do begin
> print,format='(A,A,$)',string(13b),string(i)
> endfor
> print,'' ; terminate the current line
>

I do this sort of thing by printing out the backspace character (8B)
however many times I need to overwrite the last output. This way, my
line title doesn't get smushed. In the following snippet, the XXXX, XXX
of XXX... gets overwritten with the current numbers, but the line title
"Transforming....blah blah" does not:

bksp = MAKE_ARRAY( 20, VALUE = 8B )
PRINT, FORMAT = '( /5x, "Transforming IFG for AIRS channel:", /, "XXXX,
XXX of XXX....", $ )'

begin_channel = 0
end_channel = n_channels - 1

FOR i = begin_channel, end_channel DO BEGIN

PRINT, FORMAT = '( a, i4, ", ", i3, " of ", i3, "....", $ )', $
STRING( bksp ), analysis[ i ].channel, i + 1,
n_channels

(I'm sure your news reader will truncate the lines at 80 cols, dammit)

I absolutely agree with the original posters comment about code
slow-down vs. psychological benefits. It's like getting stuck in the
subway with no info about why..... yoicks.

paulv
--
Paul van Delst Ph: (301) 763-8000 x7274
CIMSS @ NOAA/NCEP Fax: (301) 763-8545
Rm.202, 5200 Auth Rd. Email: pvandelst@ncep.noaa.gov
Camp Springs MD 20746

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[Message index]

		Re: Overwriting printings By: Paul van Delst on Fri, 23 June 2000 00:00
		Re: Overwriting printings By: promashkin on Thu, 22 June 2000 00:00
		Re: Overwriting printings By: John-David T. Smith on Thu, 22 June 2000 00:00
		Re: Overwriting printings By: Paul van Delst on Thu, 22 June 2000 00:00
		Re: Overwriting printings By: Simon de Vet on Thu, 22 June 2000 00:00
		Re: Overwriting printings By: Craig Markwardt on Thu, 22 June 2000 00:00
		Re: Overwriting printings By: dominik on Thu, 22 June 2000 00:00

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