Read a list of X,Y and an origin (Xo,Yo). Compute values that include the corresponding polar angle.

 

% xya_list.sh --help 

Help Information for:  xya_list.sh

Usage: xya_list.sh list.1 120.0 200.0  
arg1 - file with X,Y list  (usually in pixels) 
arg2 - Xo (origin)  
arg3 - Yo (origin)  

I will show: /home/sco/sco/codes/bash/HELP_FILES/xya_list.sh.help
 
Enter any key to roceed with the view of help:

xya_list.sh: 
   Read a list of X,Y values and an origin (Xo,Yo) 
   and compute a list of Xt, Y, Radius, Angle. 

   Xt,Yt  = the translated X,Y value 
   Radius = point radius relative to Xo,Yo 
   Angle  = position angle in units of degrees 

============================================================

A sample run: 

% cat list.1 
    1374.410      713.801
    1379.346      720.371
    1429.173      805.244
    1432.504      812.755
    1435.704      820.323
    1438.770      827.946

% xya_list.sh list.1 1000.503 999.844 
   373.91   -286.04    470.77   232.58
   378.84   -279.47    470.77   233.58
   428.67   -194.60    470.77   245.58
   432.00   -187.09    470.77   246.58
   435.20   -179.52    470.77   247.58
   438.27   -171.90    470.77   248.58

% cat xya_list.explain 
# Output from xya_list.sh: 
Col01: translated X (Xin-Xo) 
Col02: translated Y (Yin-Yo) 
Col03: Radius  
Col04: Angle in degrees