generate-statistics flag

[boyoforex]

Describe the bug
whenever i used the --generate-statistics or -g option, the code doesn't run. I get this message: StrainTensor.py: error: unrecognized arguments: --generate-statistics.

To Reproduce
Steps to reproduce the behavior:

1. run command '...'
   $> ./StrainTensor.py -i ../data/CNRS_midas.vel -r 18.75/30.25/32.75/42.25 --x-grid-step=0.5 --y-grid-step=0.5 --dmin=1 --dmax=500 --dstep=1 --Wt=24 -c -g
2. check for error '...'
   StrainTensor.py: error: unrecognized arguments: -g
   Expected behavior
   A clear and concise description of what you expected to happen.

Screenshots
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Desktop (please complete the following information):

• OS: [e.g. Linux]
• Python: [e.g. 2.7]
• GMT: [e.g. 5.2.1]
• StrainTool: [e.g. v1.0-beta4.0]

Additional context
Add any other context about the problem here.