Fixed bugs in levenshtein.py and generate_morse.m files

test/generate_morse.m

@@ -0,0 +1,29 @@
+function code=generate_morse(file)
+% First step: Generate 100x20 random strings and save to text file
+% You can use 
+% http://www.random.org/strings/?num=100&len=20&digits=on&upperalpha=on&loweralpha=off&unique=on&format=plain&rnd=new
+% or
+% http://www.unit-conversion.info/texttools/random-string-generator/
+
+
+fid = fopen(file,"r");
+fid2 = fopen("kaggle.csv","w")
+ 
+Fs = 8000;  % 8 KHz sampling rate 
+Tune = 600; % 600 Hz signal 
+
+row = 1;
+fprintf(fid2, "Text,ID,file,SNR,Tune,WPM\n");
+while (!feof(fid))
+	txt = fgetl (fid);
+	fname = ["cw" int2str(row) ".wav"];
+	SNR = randi([-6,60]);		% SNR between - 6 dB ... + 60 dB
+	WPM = randi([12,60]);    	% Speed between 12 ... 60 WPM
+	%Tune = randi([300,1200]);	% Null beat between 300 ... 1200 Hz
+	x = morse(txt,fname,SNR,Tune,Fs,WPM);
+	fprintf(fid2, "%s,%d,%s,%d,%d,%d\n",txt,row,fname,SNR,Tune,WPM);
+	printf("%s,row:%d,%s,SNR:%d,Tune:%d,WPM:%d\n",txt,row,fname,SNR,Tune,WPM);
+	row = row + 1;
+end
+fclose(fid); 
+fclose(fid2);

test/levenshtein.py

@@ -40,7 +40,7 @@ def run_ltest(str1,str2):
 	s1 = file.read(fid1);
 	s2 = file.read(fid2);
 	ltest = levenshtein(s1, s2)
-	
+	return ltest
 
 def main(*args, **kwargs):
   
@@ -51,8 +51,8 @@ def main(*args, **kwargs):
     verbosity = 1
 
 
-  if len(args) is 0:
-    print 'no input file provided!'
+  if len(args) < 2:
+    print 'usage: <input file1> <input file2>' 
     exit(1)
   elif len(args) == 2:
 	ltest = run_ltest(args[0],args[1])