import pynacolada as pcd
from sciproc import steinalp, dtrange
from Scientific.IO import NetCDF
import datetime as dt
import numpy as np
# purpose: 'advanced' example of making a Stein-Alpert decomposition from an monthly-mean averaged cycle (only on the 2 lowest model layers)
def avgcycle(x,n):
xout = np.zeros([n+1]+list(np.shape(x)[1:]))
for i in range(n):
xout[i] = np.mean(x[i::n],axis=0)
xout[n] = xout[0]
return xout
dts = dtrange(dt.datetime.strptime('2009040100','%Y%m%d%H'),dt.datetime.strptime('2009050100','%Y%m%d%H'),dt.timedelta(hours=1))
for RUN in ['aq09ec_td','aq09_td','aq09ec','aq09']:
path = '/media/URB_AQ_1/data/belgium_aq/rcm/'+RUN+'/stage1/aurora/au3d/'
fins = [ path+'/au3d'+time.strftime('%Y%m%d%H')+'.nc' for time in dts]
fout = NetCDF.NetCDFFile('/media/URB_AQ_1/data/belgium_aq/rcm/'+RUN+'_au3d200904_diucycle.nc','w')
pcd.pcd(lambda x: avgcycle(x,24),('time',),\
[{'file': fins, 'varname': 'O3', 'predim': 'time'}],\
[{'file': fout, 'varname': 'O3'}],appenddim=True)
fout.close(); print('data written to: ',fout)
fin = NetCDF.NetCDFFile('/media/URB_AQ_1/data/belgium_aq/rcm/'+RUN+'_au3d200904_diucycle.nc','r')
fout = NetCDF.NetCDFFile('/media/URB_AQ_1/data/belgium_aq/rcm/'+RUN+'_au3d200904_diucycle_spatvar.nc','w')
fout = NetCDF.NetCDFFile(fnout,'w')
datout = [{'file': fout, \
'varname': 'u'}]
func = lambda U,V: np.array([np.mean(np.sqrt(U**2+V**2),axis=0 )])
dnamsel = ['level',]
pcd.pcd(func,dnamsel,datin,datout,appenddim=True)
# Note also that the calculation is not entirely correct because the U and V loacations are shifted by 1/2-gridcell!
fout.close()
fin.close()
print("example 4: now we come to it's real power. Do the same as before, but for an hourly time series. ")
# the timeseries: just a list of all the files in the right order
dts = sp.dtrange(dt.datetime(2002,5,1),dt.datetime(2002,7,1),dt.timedelta(hours=1))
path = '/media/URB_UIP_2/data/rcm/0.009_20020101_berlin/cclm/out01/'
dtfiles = [path+'lffd'+dt.datetime.strftime(e,"%Y%m%d%H")+'.nc' for e in dts]
datin = [{'file': dtfiles, \
'varname': 'U', \
'dsel': {'level' : range(30,40,1)}, \
'daliases': { 'srlat':'rlat', 'srlon':'rlon' },\
},\
{'file': dtfiles, \
'varname':'V', \
'dsel': {'level' : range(30,40,1)},
'daliases': { 'srlat':'rlat', 'srlon':'rlon' },\
}\
]