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#!/usr/bin/env python3
import matplotlib.pyplot as plt
import numpy as np
import os
import argparse
from matplotlib.ticker import MultipleLocator
# read command line argument:
parser = argparse.ArgumentParser(
description="plot elevation versus distance at boundaries")
parser.add_argument("location", help="boundary location")
args = parser.parse_args()
if args.location == 'top':
inputFilename = "top_boundary.txt"
elif args.location == 'bottom':
inputFilename = "bottom_boundary.txt"
elif args.location == 'left':
inputFilename = "left_boundary.txt"
elif args.location == 'right':
inputFilename = "right_boundary.txt"
def detach_display():
x, y, z = np.loadtxt(inputFilename, delimiter=' ', unpack=True)
fig, ax = plt.subplots()
plt.plot(x,z, label='elevation')
plt.xlabel('x / m')
plt.ylabel('z / m')
ax.yaxis.set_minor_locator(MultipleLocator(0.2))
plt.grid(True, which='minor')
plt.show()
if os.fork():
# parent
pass
else:
# child
detach_display()
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