Add FrequentWords and FrequencyMap functions

Code/FrequentWords.py

@@ -0,0 +1,20 @@
+def FrequentWords(Text, k):
+    words = []
+    freq = FrequencyMap(Text, k)
+    m = max(freq.values())
+    for key in freq:
+        if freq[key] == m:
+            words.append(key)
+    return words
+
+
+def FrequencyMap(Text, k):
+    freq = {}
+    n = len(Text)
+    for i in range(n - k + 1):
+        Pattern = Text[i:i + k]
+        freq[Pattern] = 0
+    for i in range(n - k + 1):
+        Pattern = Text[i:i + k]
+        freq[Pattern] += 1
+    return freq

Notebook.org

@@ -22,3 +22,4 @@
 
 *** Vocabulary
       - k-mer: subsquences of length /k/ in a biological sequence
+      - Frequency map: sequence --> frequency of the sequence