Adds example for CW freq, f1dot, f2dot search

cw_example.py

+from __future__ import division
+import os
+import gridcorner
+import numpy as np
+import sys
+
+label = "example_cw"
+
+Alpha = 2.2
+Delta = 1.2
+Freq = 10
+f1dot = -1e-9
+f2dot = 1e-20
+
+startTime = 1200000000
+duration = 200 * 86400
+refTime = int(startTime + .5*duration)
+
+n = 100
+FreqBand = 50/duration
+f1dotBand = 50/duration**2
+f2dotBand = 50/duration**3
+
+if 'data' in sys.argv:
+    cmd = (
+        "lalapps_Makefakedata_v4 --outSingleSFT=True --outSFTbname='{}.sft' \
+        --IFO='H1' --noiseSqrtSh=1e-20 --h0=1e-20 --startTime={} --duration={}\
+        --fmin=8 --Band=4 --Alpha={} --Delta={} --Freq={} --f1dot={}\
+        --f2dot={} --refTime={} --cosi=0.5".format(
+            label, startTime, duration, Alpha, Delta, Freq, f1dot,
+            f2dot, refTime))
+    print(cmd)
+    os.system(cmd)
+
+    cmd = (
+        "lalapps_ComputeFstatistic_v2\
+        --Alpha={} \
+        --Delta={} \
+        --Freq={} --FreqBand={} --dFreq={} \
+        --f1dot={} --f1dotBand={} --df1dot={} \
+        --f2dot={} --f2dotBand={} --df2dot={} \
+        --DataFiles='{}.sft'\
+        --outputFstat='./{}.txt' --refTime={}".format(
+            Alpha, Delta,
+            Freq-FreqBand/2, FreqBand, FreqBand/n,
+            f1dot-f1dotBand/2, f1dotBand, f1dotBand/n,
+            f2dot-f2dotBand/2, f2dotBand, f2dotBand/n,
+            label, label, refTime))
+
+    print(cmd)
+    os.system(cmd)
+
+data = np.loadtxt("{}.txt".format(label), comments='%')
+
+sFreq = np.unique(data[:, 0])
+sf1dot = np.unique(data[:, 3])
+sf2dot = np.unique(data[:, 4])
+sAlpha = np.unique(data[:, 1])
+sDelta = np.unique(data[:, 2])
+
+stwoF = data[:, -1].reshape(len(sFreq), len(sf1dot), len(sf2dot))
+print stwoF.shape
+
+fig, axes = gridcorner.gridcorner(
+    stwoF, xyz=[sFreq, sf1dot, sf2dot], projection='log_mean',
+    labels=['Freq', 'f1dot', 'f2dot', '$2\mathcal{F}$'])
+fig.savefig(label)