S = np.zeros(shape = (20, 50), dtype = np.int32) S[10:18, 25:45] = 1 S[0:3, 6:12] = 2 S[8:15, 2:12] = 3 v, Sr = constructVAR(S, [0.0, 0.4, 0.8, 0.7], [-0.5, 0.5], [0.0, 0.0]) # v, Sr = constructVAR(S, [0.0, 0.001, 0.01], [-0.1, 0.1], [0.00, 0.00], [0.01, 0.01]) ts = v.simulate(200) gf = make_model_geofield(S, ts) # initialize a parallel pool pool = Pool(POOL_SIZE) # replace field with surrogate field sgf = SurrGeoFieldAR() sgf.copy_field(gf) sgf.prepare_surrogates(pool) sgf.construct_surrogate_with_noise() gf = sgf gf.d = gf.surr_data().copy() # # construct "components" from the structural matrix Uopt = np.zeros((len(Sr), np.amax(Sr))) for i in range(Uopt.shape[1]): Uopt[:,i] = np.where(Sr == (i+1), 1.0, 0.0) # remove the first element (it's the driver which is not included in the optimal component) Uopt[np.nonzero(Uopt[:,i])[0][0],i] = 0.0 Uopt[:,i] /= np.sum(Uopt[:,i]**2) ** 0.5 print("Analyzing data ...") # compute the eigenvalues and eigenvectors of the (spatial) covariance matrix
from datetime import datetime, date from surr_geo_field_ar import SurrGeoFieldAR from geo_field import GeoField from multiprocessing import Pool # load netCDF SLP field d = GeoField() d.load("/home/martin/Work/Geo/data/netcdf/pres.mon.mean.nc", 'pres') d.slice_date_range(date(1948, 1, 1), date(2012, 1, 1)) #d.slice_months([12, 1, 2]) d.slice_spatial(None, [-89, 89]) # copy into surrogate field sd = SurrGeoFieldAR() sd.copy_field(d) # create the Pool pool = Pool(4) t1 = datetime.now() sd.prepare_surrogates(pool) print("Prep: elapsed time %s" % str(datetime.now() - t1)) t1 = datetime.now() sd.construct_surrogate() print("Gen: elapsed time %s" % str(datetime.now() - t1)) t1 = datetime.now() sd.construct_surrogate() print("Gen: elapsed time %s" % str(datetime.now() - t1))
S = np.zeros(shape=(20, 50), dtype=np.int32) S[10:18, 25:45] = 1 S[0:3, 6:12] = 2 v, Sr = constructVAR(S, [0.0, 0.8, 0.8], [-0.1, 0.1], [0.0, 0.0]) #v, Sr = constructVAR2(S, [-0.2, 0.2], [0.0, 0.9, 0.9], 0.8) #S = np.zeros(shape = (5, 10), dtype = np.int32) #S[1:4, 0:2] = 1 #S[0:3, 6:9] = 2v, Sr = constructVAR(S, [0.0, 0.191, 0.120], [-0.1, 0.1], [0.00, 0.00], [0.01, 0.01]) ts = v.simulate(768) gf = make_model_geofield(S, ts) sgf = SurrGeoFieldAR() sgf.copy_field(gf) sgf.prepare_surrogates() sgf.construct_surrogate_with_noise() ts2 = sgf.surr_data() plt.figure(figsize=(8, 8)) plt.imshow(S, interpolation='nearest') plt.title('Structural matrix') plt.figure() plt.imshow(v.A, interpolation='nearest') plt.colorbar() plt.title('AR structural') plt.figure() plt.plot(ts) plt.title('Simulated time series')
# <codecell> print gf.d.shape print gf.lons[0], gf.lons[-1] print gf.lats[0], gf.lats[-1] print gf.d.shape[1] * gf.d.shape[2] # <codecell> if USE_SURROGATE_MODEL: pool = Pool(POOL_SIZE) sgf = SurrGeoFieldAR([0, MAX_AR_ORDER], 'sbc') print("Running preparation of surrogates ...") sgf.copy_field(gf) sgf.prepare_surrogates(pool) sgf.construct_surrogate_with_noise() sgf.d = sgf.sd # hack to replace original data with surrogate print("Max AR order is %d ..." % sgf.max_ord) gf = sgf print("Replaced field with surrogate field.") pool.close() del pool print("Analyzing data ...") d = gf.data() if COSINE_REWEIGHTING: d *= gf.qea_latitude_weights() Ud, sd, Vtd = pca_components_gf(d) Ud = Ud[:, :NUM_COMPONENTS] if not ROTATE_NORMALIZED:
from datetime import datetime, date from surr_geo_field_ar import SurrGeoFieldAR from geo_field import GeoField from multiprocessing import Pool # load netCDF SLP field d = GeoField() d.load("/home/martin/Work/Geo/data/netcdf/pres.mon.mean.nc", 'pres') d.slice_date_range(date(1948, 1, 1), date(2012, 1, 1)) #d.slice_months([12, 1, 2]) d.slice_spatial(None, [-89, 89]) # copy into surrogate field sd = SurrGeoFieldAR() sd.copy_field(d) # create the Pool pool = Pool(4) t1 = datetime.now() sd.prepare_surrogates(pool) print("Prep: elapsed time %s" % str(datetime.now() - t1)) t1 = datetime.now() sd.construct_surrogate() print("Gen: elapsed time %s" % str(datetime.now() - t1)) t1 = datetime.now() sd.construct_surrogate() print("Gen: elapsed time %s" % str(datetime.now() - t1))
S = np.zeros(shape = (20, 50), dtype = np.int32) S[10:18, 25:45] = 1 S[0:3, 6:12] = 2 v, Sr = constructVAR(S, [0.0, 0.8, 0.8], [-0.1, 0.1], [0.0, 0.0]) #v, Sr = constructVAR2(S, [-0.2, 0.2], [0.0, 0.9, 0.9], 0.8) #S = np.zeros(shape = (5, 10), dtype = np.int32) #S[1:4, 0:2] = 1 #S[0:3, 6:9] = 2v, Sr = constructVAR(S, [0.0, 0.191, 0.120], [-0.1, 0.1], [0.00, 0.00], [0.01, 0.01]) ts = v.simulate(768) gf = make_model_geofield(S, ts) sgf = SurrGeoFieldAR() sgf.copy_field(gf) sgf.prepare_surrogates() sgf.construct_surrogate_with_noise() ts2 = sgf.surr_data() plt.figure(figsize = (8, 8)) plt.imshow(S, interpolation = 'nearest') plt.title('Structural matrix') plt.figure() plt.imshow(v.A, interpolation = 'nearest') plt.colorbar() plt.title('AR structural') plt.figure() plt.plot(ts) plt.title('Simulated time series')