def test_dbscan(self):
dbs = dbscan.DBSCAN(eps=0.4, min_samples=5)
clusters = dbs.fit_predict(self.X)
self.assertEqual(len(np.unique(clusters[clusters >= 0])), 2)
dbs = dbscan.DBSCAN(eps=0.2)
clusters = dbs.fit_predict(self.X)
self.assertGreater(len(np.unique(clusters[clusters >= 0])), 3)
self.assertGreater(np.sum(clusters < 0), 3)
def process_aggregation(subj, filename, clas, boxes, tips, notches):
# scale a suitable eps for clustering the boxes from the median box width
w = []
for idn in range(0, len(boxes)):
w.append(boxes[idn][2])
if len(w) > 0:
typ_width = median(w)
else:
typ_width = 60
# scale a suitable min_points from the number of classifications
min_point = max(int(clas * .405), 2)
# cluster the boxes centroids
epb = max(typ_width * .20, 20)
scanb = dbscan.DBSCAN(epb, min_point)
scanb.cluster(boxes)
sorted_boxes = sorted(scanb.points,
key=operator.itemgetter(0),
reverse=True)
bc_p = json.dumps(sorted_boxes)
bclusters = json.dumps(scanb.clusters)
# cluster the tip and notch points
ept = max(typ_width * .15, 20)
scant = dbscan.DBSCAN(ept, min_point)
scant.cluster(tips)
sorted_tips = sorted(scant.points, key=operator.itemgetter(1))
tc_p = json.dumps(sorted_tips)
tclusters = json.dumps(scant.clusters)
scann = dbscan.DBSCAN(ept, min_point)
scann.cluster(notches)
nc_p = json.dumps(scann.points)
nclusters = json.dumps(scann.clusters)
# clean up the clusters to settle on boxes with exactly two enclosed tip points
fluke_positions = fluke_pos(subj, sorted_tips, sorted_boxes)
# prepare a row for write the resolved fluke boxes and points to file
new_row = {
'subject_ids': subj,
'filename': filename,
'classifications': clas,
'boxes': json.dumps(boxes),
'box_clusters': bc_p,
'bclusters': bclusters,
'tips': json.dumps(tips),
'tip_clusters': tc_p,
'tclusters': tclusters,
'notches': json.dumps(notches),
'notch_clusters': nc_p,
'nclusters': nclusters,
'flukes': json.dumps(fluke_positions)
}
return new_row
def process_aggregation(subj, image, clas, ep, min_point, h_palms, flowring,
leafles):
if clas > 10: # test for a minimum of 10 valid clssifications
scanh = dbscan.DBSCAN(ep, min_point)
scanh.cluster(h_palms)
hc_p = json.dumps(scanh.points)
count_h = len(scanh.points)
hclusters = json.dumps(scanh.clusters)
hnoise = json.dumps(scanh.noise)
scanf = dbscan.DBSCAN(ep, min_point)
scanf.cluster(flowring)
fc_p = json.dumps(scanf.points)
count_f = len(scanf.points)
fclusters = json.dumps(scanf.clusters)
fnoise = json.dumps(scanf.noise)
scanl = dbscan.DBSCAN(ep, min_point)
scanl.cluster(leafles)
lc_p = json.dumps(scanl.points)
count_l = len(scanl.points)
lclusters = json.dumps(scanl.clusters)
lnoise = json.dumps(scanl.noise)
print(subject)
new_row = {
'subject_ids': subj,
'image': image_number,
'classifications': i,
'Count_h_palms': count_h,
'H_palm_clusters': hc_p,
'Hclusters': hclusters,
'Hnoise': hnoise,
'Count_flowering': count_f,
'flowering_clusters': fc_p,
'fclusters': fclusters,
'fnoise': fnoise,
'Count_leafless': count_l,
'leafless_clusters': lc_p,
'lclusters': lclusters,
'lnoise': lnoise
}
writer.writerow(new_row)
return True
else:
return False
def main():
FileName = 'DBSCAN_data.csv'
eps = 5
MinPts = 2
print("\nImporting csv file", FileName, "...")
D = dbscan.dataRead(FileName)
print("IMPORTING COMPLETE\n")
obj = dbscan.DBSCAN(D, eps, MinPts)
print("The input dataset for our clustering is:")
obj.displayDataset()
print("Running DBSCAN clustering...")
obj.runDBSCAN()
print("CLUSTERING COMPLETE\n")
print("The clusters are:")
obj.displayClusters()
print("The noise obtained after clustering are:")
obj.displayNoise()
ClusterList = obj.createClusterList()
NoiseList = obj.createNoiseList()
graphplot.plot(ClusterList, NoiseList)
print(len(a))
print(ag.GetLabels(len(a)))
from sklearn import datasets
blobs, _ = datasets.make_blobs(n_samples=300, random_state=10)
ag = agnes.Agnes(3)
skk.fit(blobs)
print("sklearn clusters")
print(skk.labels_[:30])
ag.Fit(blobs)
print('agnes clusters')
print(ag.GetLabels(len(blobs)).astype(np.int)[:30])
# DBSCAN TESTING
sys.stderr.write("Importing DBSCAN\n")
import dbscan
sys.stderr.write("Importing Finished\n")
sys.stderr.write("Initting\n")
db = dbscan.DBSCAN(0.5, 5)
sys.stderr.write("Finished Init\n")
sys.stderr.write("Fitting\n")
db.Fit(a)
sys.stderr.write("Finished Fitting\n")
sys.stderr.write("Cluster Representation\n")
# ????
print(len(a))
print(db.GetLabels(len(a)))
for i in range(n):
c = agnes.Agnes(3, 'wards')
t0 = time.time()
c.Fit(blobs)
t1 = time.time()
t_total += (t1-t0)
aimpl = t_total/n
t_total = 0.0
for i in range(n):
c = cluster.DBSCAN(1.5, 5)
t0 = time.time()
c.fit(blobs)
t1 = time.time()
t_total += (t1-t0)
dref = t_total/n
t_total = 0.0
for i in range(n):
c = dbscan.DBSCAN(1.5, 5)
t0 = time.time()
c.Fit(blobs)
t1 = time.time()
t_total += (t1-t0)
dimpl = t_total/n
print('{:<5d}\t{:<10.4f}\t{:<10.4f}\t{:<10.4f}\t{:<10.4f}\t{:<10.4f}\t{:<10.4f}'.format(num, kref, kimpl, aref, aimpl, dref, dimpl))
for p in range(0, len(D)):
for q in range(0, len(D)):
distance[p, q] = numpy.linalg.norm(D[p] - D[q])
return numpy.sort(distance, axis=0)
# Reading and extracting data
data = pd.read_csv('cho.txt', header=None, sep='\t')
#data = pd.read_csv('iyer.txt', header=None, sep='\t')
#data = pd.read_csv('new_dataset_1.txt', header=None, sep='\t')
data = data.values
data_ground_truth = data[:, 1]
data_features = data[:, 2:]
# Determining eps
for i in range(
3, 20, 1
): # i - MinPts, we consider an representative range 3 to 20 all the time
epsOpt(i - 1,
data_features) # obtain sorted distance plot by running epsOpt
# determing eps by taking the average of best eps for each MinPts from 3 to 20 by the plot,
# the best eps for each MinPts is the gap point
# Determining MinPts by iteration
# after determining eps by first running, subsititute eps in the following DBSCAN function and then run again
for j in range(3, 20, 1):
data_id = dbscan.DBSCAN(data_features, 1.3, j)
ARI = dbscan.adjusted_rand_score(data_ground_truth, data_id)
print('The Rand Index of eps {} MinPts {} is {}'.format(1.3, j, ARI))
# choose the MinPts-eps pair with the largest rand index
# as usual the module must be in the current directory or in the sys path.
import dbscan
# data is just a list of [x,y]
data = [(629.1, 187.4), [636.5, 73.7], [474.4, 300.0], [541.7, 476.9],
[544.9, 471.6], [529.1, 494.8, 'label'], (533.8, 473.2),
[508.0, 362.1, 'label'], [485.9, 246.3], [484.9, 251.6],
[370.1, 253.7], [604.7, 271.6], (607.0, 288.4), [603.8, 297.9],
[719.6, 333.7]]
# determine a suitable eps and min_points
eps = 30
min_points = 3
print('epsilon =', eps, ' min_points =', min_points)
# and plug into a module containing an instance of class DBSCAN:
scan = dbscan.DBSCAN(eps, min_points)
# pass the data to the cluster function
scan.cluster(data)
# all done! Get the clustered data back:
print('clusters found:', scan.clusters)
print('number_of_clusters =', (len(scan.clusters)))
print('noise ie points in no cluster:', scan.noise)
# to save it in a known format convert to json strings.
# note subtle changes in brackets and quotes will occur!
clusters = json.dumps(scan.clusters)
noise = json.dumps(scan.noise)
print('ready to write clusters =', clusters)
print('ready to write noise =', noise)