To run lots of trs_apply examples I built the script named Run_trs_apply. Just like my first demo, it build the input X,Y set from a local file named t.1. It runs trs_apply and also constructs files that make it easy to plot various parts of the transformation sequence. Below I first show a sample run that reproduces our first example. Then I show the run script

% ls
Run_trs_apply*	TRS
% cp ../S/* .
% ls
Run_trs_apply*	t.1  TRS
% cat TRS
 500.0  500.0   N      1.0     20.0    0.0  0.0
% Run_trs_apply 1

# I enter the name of my data file (t.1)
A plot appears and I use it to make the figure directly below. 

# # To see every step that was performed: 
% cat trs_apply_ex.STEPS 
 
Steps performed by trs_apply_ex: 
Step1:   trs_translate.sh file1.xy 500.0 500.0
Step2:   trs_reflect.sh xy.step1_translate N 
Step3:   trs_scale.sh xy.step2_reflect 1.0 
Step4:   trs_rotate.sh xy.step3_scale 20.0 
Step5:   trs_translate.sh xy.step4_rotate 0.0 0.0 

An example of a trs_apply run (using Run_trs_apply) to demonstrate a single translation (linear shift in X and Y). Here we see that the original (red squares) Point1 at X,Y=500,500 has been translated to X,Y=0,0. Beyond this, the transformed points (the blue hexagons) have not been altered using reflection, scale change, or rotation. The TRS parameters used in this trs_apply run are given as the plot title.

   ****** Here is Run_trs_apply  *********
#!/bin/bash

# Check command line args
if [ -z "$1" ]
then
 printf "Usage:Run_trs_apply_ex 2 \n"
 printf "arg1 - integer number for example number  \n"
 printf "Note: The trs paramters are read from ./TRS file.  \n"
 exit
fi

#   500.0  500.0   N      1.0   0.0    -450.0  -490.0
# Read the transformation values 
if [ -e "TRS" ] 
then 
 read XoS YoS flip scal rot XoF YoF < TRS
else 
 printf "\n\tError: There is no local TRS file.\n "
 exit
fi 

# Make the TRS file for this example 
printf " $XoS $YoS $flip $scal $rot $XoF $YoF\n" > TRS.$1

# Start to build new Style file 
printf "TRS: $XoS $YoS $flip $scal $rot $XoF $YoF \n" > Style.file_$1
printf "X axis\nY axis\nXY0.plot\n" >> Style.file_$1

# Build the test data set 
trs_make_xy_TestData read 
cp XY0.data file1.xy 

# Run the transformation 
trs_apply_ex file1.xy TRS.$1 Y > file2.xy 

# Build the plot file to add the new set (file2.xy) 
trs_build_plot_file file2.xy b h 90 15 "FINAL set" > XY2.plot
printf "XY2.plot\n" >> Style.file_$1

# Plot the set 
trs_plot.py Style.file_$1 -600 1200 -600 1200 SHOW