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Re: Use of Cursor [message #78912 is a reply to message #78911]

Thu, 12 January 2012 00:40

d.poreh
Messages: 406
Registered: October 2007

Senior Member

On Jan 12, 5:06 am, Craig Markwardt <craig.markwa...@gmail.com> wrote:
> On Jan 11, 9:47 pm, singlebinary <singlebin...@gmail.com> wrote:
>
>
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>
>
>
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>> Hello All,
>
>> I am a beginner IDL user. I would like to make use of the cursor to
>> read the x and y coordinates on a plot. I would like to read twice. I
>> searched online and wrote a program of my own (see below). There are
>> two problems with the program: (1) it does not give me the value on
>> the plot but rather the pixel value; (2) it simply does not work
>> unless I close the graphics window. It then outputs -1 -1.
>
>> Please do guide me in this regard. Thanks!
>
>> PRO cursor_use
>> x = findgen(1000)*0.01
>> y = sin(x)
>> PLOT, x, y
>> n = 2
>> FOR i = 0, n-1 DO BEGIN
>> CURSOR, x, y, /DEVICE, /WAIT
>> PRINT, "This is cursor position", x,y
>> PRINT, "Click again..."
>> ENDFOR
>> END
>
> If you want pixel coordinates use /DEVICE, but if you want data
> coordinates, then don't use /DEVICE.
>
> Craig

Guys
i am also interested to do so, and what i have in my mind is, how
could we define a keyboard push (for instance ctrl+r) that every time
we push that the cursor would be activated and ready to get x-y
coordinates. Any suggestion?
Cheers,
Dave

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[Message index]

		Re: Use of Cursor By: David Fanning on Thu, 12 January 2012 05:43
		Re: Use of Cursor By: d.poreh on Thu, 12 January 2012 05:38
		Re: Use of Cursor By: David Fanning on Thu, 12 January 2012 05:32
		Re: Use of Cursor By: d.poreh on Thu, 12 January 2012 00:40
		Re: Use of Cursor By: Craig Markwardt on Wed, 11 January 2012 20:06

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