Made some changes to presentation
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7666d6d32f
commit
adf8d929dd
@ -296,8 +296,17 @@
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"source": [
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"How do we know which one to pick as the next word?\n",
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"\n",
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"Why not the word that occurred the most often after the condition in the corpus?\n",
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"\n",
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"Why not the word that occurred the most often after the condition in the corpus?"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"source": [
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"We can use a **Conditional Frequency Distribution (CFD)** to figure that out!\n",
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"\n",
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"A **CFD** can tell us: given a **condition**, what is **likely** to follow?"
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@ -332,7 +341,8 @@
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}
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],
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"source": [
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"words = 'The quick brown fox jumped over the lazy dog and the quick cat'.split(' ')\n",
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"words = ('The quick brown fox jumped over the '\n",
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" 'lazy dog and the quick cat').split(' ')\n",
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"print words"
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]
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},
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@ -349,8 +359,18 @@
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"source": [
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"from collections import defaultdict\n",
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"\n",
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"cfd = defaultdict(lambda: defaultdict(lambda: 0))\n",
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"condition = 'the'"
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"cfd = defaultdict(lambda: defaultdict(lambda: 0))"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## Conditional Frequency Distributions (CFDs) ##"
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]
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},
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{
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@ -365,7 +385,15 @@
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{
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"data": {
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"text/plain": [
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"{'the': {'lazy': 1, 'quick': 2}}"
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"{'and': {'the': 1},\n",
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" 'brown': {'fox': 1},\n",
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" 'dog': {'and': 1},\n",
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" 'fox': {'jumped': 1},\n",
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" 'jumped': {'over': 1},\n",
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" 'lazy': {'dog': 1},\n",
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" 'over': {'the': 1},\n",
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" 'quick': {'brown': 1},\n",
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" 'the': {'lazy': 1, 'quick': 2}}"
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]
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},
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"execution_count": 8,
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@ -374,11 +402,10 @@
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}
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],
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"source": [
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"for i in range(len(words) - 2):\n",
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" if words[i].lower() == condition:\n",
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" cfd[condition][words[i+1]] += 1\n",
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"for i in range(len(words) - 2): # loop to the next-to-last word\n",
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" cfd[words[i].lower()][words[i+1].lower()] += 1\n",
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"\n",
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"# pretty print the defaultdict \n",
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"# pretty print the defaultdict\n",
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"{k: dict(v) for k, v in dict(cfd).items()}"
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]
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},
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@ -386,11 +413,11 @@
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"cell_type": "markdown",
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"metadata": {
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"slideshow": {
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"slide_type": "slide"
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"slide_type": "fragment"
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}
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},
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"source": [
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"## What's the most likely? ##"
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"So, what's the most likely word to follow `'the'`?"
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]
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},
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{
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@ -414,7 +441,7 @@
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}
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],
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"source": [
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"max(cfd[condition])"
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"max(cfd['the'])"
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]
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},
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{
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@ -447,7 +474,7 @@
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},
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{
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"cell_type": "code",
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"execution_count": 10,
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"execution_count": 31,
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"metadata": {
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"slideshow": {
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"slide_type": "fragment"
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@ -458,7 +485,7 @@
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"must therefore that half ago for hope that occasion , Perry -- abundance about ten\n"
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"her reserve and concealment towards some feelings in moving slowly together . You will shew\n"
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]
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}
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],
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@ -599,7 +626,7 @@
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},
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{
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"cell_type": "code",
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"execution_count": 15,
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"execution_count": 30,
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"metadata": {
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"slideshow": {
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"slide_type": "fragment"
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@ -612,22 +639,16 @@
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"text": [
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"(SBARQ\n",
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" (SQ\n",
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" (NP (PRP she))\n",
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" (VP\n",
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" (VBD was)\n",
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" (VBN obliged)\n",
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" (S+VP (TO to) (VP (VB stop) (CC and) (VB think)))))\n",
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" (NP (PRP I))\n",
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" (VP (VBP do) (RB not) (VB advise) (NP (DT the) (NN custard))))\n",
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" (. .))\n",
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"she was obliged to stop and think .\n",
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"I do not advise the custard .\n",
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"==============================\n",
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"They was hacked to amp ; support !\n",
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"I do n't want the drone !\n",
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"(SBARQ\n",
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" (SQ\n",
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" (NP (PRP They))\n",
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" (VP\n",
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" (VBD was)\n",
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" (VBN hacked)\n",
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" (S+VP (TO to) (VP (VB amp) (CC ;) (VB support)))))\n",
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" (NP (PRP I))\n",
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" (VP (VBP do) (RB n't) (VB want) (NP (DT the) (NN drone))))\n",
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" (. !))\n"
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]
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}
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@ -637,7 +658,7 @@
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"\n",
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"# inserts matching syntax subtrees from trump.txt into\n",
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"# trees from austen-emma.txt\n",
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"generate('trump.txt', word_limit=15)"
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"generate('trump.txt', word_limit=10)"
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]
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},
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{
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