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Use of Cursor [message #78916]

Wed, 11 January 2012 18:47

Rohit Deshpande
Messages: 6
Registered: June 2011

Junior Member

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

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