Revision Log

winddist.py

Revision 80 (checked in by cbc, 13 years ago)	Refactor meanspeed.py and make most recent plot the subject of index.html for both meanspeed.py and winddist.py.

Line
1	import os,datetime,glob
2	import multiprocessing
3	import numpy as np
4	import matplotlib as mpl
5	mpl.use("Agg")
6	from windrose import WindroseAxes
7	from matplotlib import pyplot as plt
8	import pycdf
9
10	ncDir = '/seacoos/data/nccoos/level1/billymitchell/sodar1'
11	ncFileGlob = 'billymitchell_sfas_*.nc'
12
13	pngDir = '/seacoos/data/nccoos/level1/billymitchell/sodar1/plots/winddist'
14	if not os.path.exists(pngDir):
15	os.mkdir(pngDir)
16
17	pngExt = 'png'
18	htmlExt = 'html'
19
20	ncFilePattern = os.path.join(ncDir,ncFileGlob)
21	files = glob.glob(ncFilePattern)
22	previous = [files[-1]] + files[:-1]
23	next = files[1:] + [files[0]]
24	files = zip(previous,files,next)
25
26	html1 = """<html>
27	<head>
28	<title>
29	Billy Mitchell Sodar :: """
30
31
32	html2 = """ :: Wind Distribution at """
33
34	html3 = """ Meters Above Sea Level
35	</title>
36	</head>
37	<body>
38	<form>
39	<a href=\""""
40
41	html4 = """\"><Previous Month</a>
42	<a href=\""""
43
44	html5 = """\">Next Month></a>
45	<a href=\""""
46
47	html6 = """\"><Previous Elevation</a>
48	<a href=\""""
49
50	html7 = """\">Next Elevation></a>
51	</form>
52	<br/>
53	<img src=\""""
54
55	html8 = """\"/>
56	</body>
57	</html>"""
58
59	def _components(fileSpec):
60	"Figure out year and month from file specification."
61
62	fileName = os.path.splitext(os.path.basename(fileSpec))[0]
63	year = fileName[-7:-3]
64	month = fileName[-2:]
65	monthName = datetime.datetime(int(year),int(month),1).strftime('%B')
66	return (fileName, year, month, monthName)
67
68	def winddist((previous, ncFile, next), pngDir, genHtml=False, lastMonth=False):
69	print 'Processing',ncFile
70	ncFileName, year, month, monthName = _components(ncFile)
71	previous, previousYear, previousMonth, previousMonthName = _components(previous)
72	next, nextYear, nextMonth, nextMonthName = _components(next)
73
74	nc = pycdf.CDF(ncFile)
75
76	t = nc.var('time')[:]
77	z = nc.var('z')[:]
78	u = nc.var('u')[:]
79	v = nc.var('v')[:]
80	w = nc.var('w')[:]
81
82	mu = np.ma.masked_invalid(u)
83	mv = np.ma.masked_invalid(v)
84	mw = np.ma.masked_invalid(w)
85
86	mumean = mu.mean(axis=0)
87	mvmean = mv.mean(axis=0)
88	mwmean = mw.mean(axis=0)
89
90	ucount = mu.count(axis=0)
91	vcount = mv.count(axis=0)
92	wcount = mw.count(axis=0)
93
94	mrho = np.sqrt((mu2) + (mv2))
95	mrho = mrho.T
96	mtheta = (180 * np.arctan2(mv, mu)/np.pi)
97	theta = np.piecewise(mtheta,
98	(mtheta <= 90, mtheta > 90),
99	(lambda x: 90 - x, lambda x: 450 - x))
100	mtheta = np.ma.array(theta,mask=mtheta.mask)
101	mtheta = mtheta.T
102
103	rho = [np.array([elem
104	for elem,mask
105	in zip(row.data,row.mask)
106	if not mask])
107	for row
108	in mrho]
109	theta = [np.array([elem
110	for elem,mask
111	in zip(row.data,row.mask)
112	if not mask])
113	for row
114	in mtheta]
115
116	firstElevation = True
117	indices = range(len(rho))
118	previousX = [indices[-1]] + indices[:-1]
119	nextX = indices[1:] + [indices[0]]
120	indices = zip(previousX,indices,nextX)
121	for previousX,x,nextX in indices:
122	if rho[x].any():
123	fig = plt.figure(figsize=(8, 8), dpi=80, facecolor='w', edgecolor='w')
124	spt = fig.suptitle('Billy Mitchell Sodar :: ' + monthName + " " + year)
125	rect = [0.16, 0.16, 0.68, 0.68]
126	ax = WindroseAxes(fig, rect, axisbg='w')
127	ax.set_title('Wind Distribution at %d Meters Above Sea Level\nPercentage of Wind Magnitude From Direction\n\n' % z[x],fontsize=spt.get_fontsize()*0.8)
128	fig.add_axes(ax)
129	ax.bar(theta[x], rho[x], bins = np.arange(0.0,20.0,2.5), normed=True, opening=0.8, edgecolor='white')
130	yticklabels = ['',] + \
131	[" %s%%" % plt.getp(textobj,'text')
132	for textobj in plt.getp(ax,'yticklabels')[1:]]
133	plt.setp(ax,yticklabels=yticklabels)
134	l = ax.legend(axespad=-0.20,title="Magnitude (m/s)")
135	plt.setp(l.get_texts(), fontsize=8)
136	dirName = "%4u_%02u" % (int(year), int(month))
137	if not os.path.exists(os.path.join(pngDir, dirName)):
138	os.mkdir(os.path.join(pngDir, dirName))
139	outFile = os.path.join(pngDir,dirName,('%03um' % z[x]) + os.extsep + pngExt)
140	print 'Saving', outFile
141	fig.savefig(outFile)
142	fig.clear()
143
144	if genHtml:
145	htmlFile = os.path.join(pngDir,ncFileName + "_" + ('%dm' % z[x]) + os.extsep + htmlExt)
146	html = html1 + monthName + " " + year
147	html = html + html2 + ('%dm' % z[x])
148	html = html + html3 + previous + "_" + ('%dm' % z[x]) + os.extsep + htmlExt
149	html = html + html4 + next + "_" + ('%dm' % z[x]) + os.extsep + htmlExt
150	html = html + html5 + ncFileName + "_" + ('%dm' % z[previousX]) + os.extsep + htmlExt
151	html = html + html6 + ncFileName + "_" + ('%dm' % z[nextX]) + os.extsep + htmlExt
152	html = html + html7 + os.path.join(dirName,os.path.basename(outFile)) + html8
153	handle = open(htmlFile,'w')
154	handle.write(html)
155	handle.close()
156
157	if lastMonth and firstElevation:
158	firstElevation = False
159	htmlFile = os.path.join(pngDir,"index" + os.extsep + htmlExt)
160	handle = open(htmlFile,'w')
161	handle.write(html)
162	handle.close()
163
164	if __name__ == "__main__":
165	lastMonth = False
166	for previous,ncFile,next in files:
167	if next <= ncFile:
168	lastMonth = True
169	p = multiprocessing.Process(target=winddist, args=((previous, ncFile, next), pngDir, True, lastMonth))
170	p.start()
171	p.join()
172	if p.exitcode:
173	print "Exitcode %s from processing %s" % (p.exitcode, ncFile)

Note: See TracBrowser for help on using the browser.

root/sodarplot/trunk/sodarplot/scintec/winddist.py

Download in other formats: