Files
fastembed/docs/experimental/Binary Quantization from Scratch.ipynb
Nirant e3d2e1dc44 Hybrid Search Tutorial (#165)
* Re-organize docs

* Rename notebooks

* Move nbs

* Working Sparse and Dense Search

* Add RRF

* Refactor code to improve performance and readability

* Add ESCI label for the RRF results

* Update docs/examples/Hybrid_Search.ipynb

Co-authored-by: Anush  <anushshetty90@gmail.com>

* Update docs/examples/Hybrid_Search.ipynb

Co-authored-by: Anush  <anushshetty90@gmail.com>

* Remove unnecessary code and update vector format

---------

Co-authored-by: Anush <anushshetty90@gmail.com>
2024-03-29 21:10:14 +05:30

454 lines
12 KiB
Plaintext

{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": []
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Setup: Install Dependencies, Imports & Download Embeddings"
]
},
{
"cell_type": "code",
"execution_count": 11,
"metadata": {},
"outputs": [],
"source": [
"!pip install matplotlib tqdm pandas numpy --quiet"
]
},
{
"cell_type": "code",
"execution_count": 12,
"metadata": {
"id": "WBVTItUX4yyr"
},
"outputs": [],
"source": [
"import numpy as np\n",
"import pandas as pd\n",
"from tqdm import tqdm"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## 👨🏾‍💻 Code Walkthrough\n",
"Here's an explanation of the code structure provided:\n",
"\n",
"1. **Loading Data**: OpenAI embeddings are loaded from a parquet files (we can load upto 1M embedding) and concatenated into one array.\n",
"2. **Binary Conversion**: A new array with the same shape is initialized with zeros, and the positive values in the original vectors are set to 1.\n",
"3. **Accuracy Function**: The accuracy function compares original vectors with binary vectors for a given index, limit, and oversampling rate. The comparison is done using dot products and logical XOR, sorting the results, and measuring the intersection.\n",
"4. **Testing**: The accuracy is tested for different oversampling rates (1, 2, 4), revealing a correctness of ~0.96 for an oversampling of 4.\n",
"\n",
"\n",
"## 💿 Loading Data"
]
},
{
"cell_type": "code",
"execution_count": 13,
"metadata": {
"colab": {
"base_uri": "https://localhost:8080/",
"height": 250
},
"id": "REJpFqkG7EG2",
"outputId": "7a43c0ae-fbcc-45fe-fd58-bfe691297b22"
},
"outputs": [
{
"name": "stderr",
"output_type": "stream",
"text": [
"100%|██████████| 26/26 [00:10<00:00, 2.45it/s]\n"
]
},
{
"data": {
"text/plain": [
"(1000000, 1536)"
]
},
"execution_count": 13,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"def get_openai_vectors(force_download: bool = False):\n",
" res = []\n",
" for i in tqdm(range(26)):\n",
" if force_download:\n",
" !wget https://huggingface.co/api/datasets/KShivendu/dbpedia-entities-openai-1M/parquet/KShivendu--dbpedia-entities-openai-1M/train/{i}.parquet\n",
" df = pd.read_parquet(f\"{i}.parquet\", engine=\"pyarrow\")\n",
" res.append(np.stack(df.openai))\n",
" del df\n",
"\n",
" openai_vectors = np.concatenate(res)\n",
" del res\n",
" return openai_vectors\n",
"\n",
"\n",
"openai_vectors = get_openai_vectors(force_download=False)\n",
"openai_vectors.shape"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## ㆓ Binary Conversion\n",
"\n",
"Here, we will use 0 as the threshold for the binary conversion. All values greater than 0 will be set to 1, and others will remain 0. This is a simple and effective way to convert continuous values into binary values for OpenAI embeddings."
]
},
{
"cell_type": "code",
"execution_count": 14,
"metadata": {
"id": "0JM2-Bj2Jkab"
},
"outputs": [],
"source": [
"openai_bin = np.zeros_like(openai_vectors, dtype=np.int8)\n",
"openai_bin[openai_vectors > 0] = 1"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## 🎯 Accuracy Function\n",
"\n",
"We will use the accuracy function to compare the original vectors with the binary vectors for a given index, limit, and oversampling rate. The comparison is done using dot products and logical XOR, sorting the results, and measuring the intersection."
]
},
{
"cell_type": "code",
"execution_count": 15,
"metadata": {
"id": "FqshI-GlIERd"
},
"outputs": [],
"source": [
"def accuracy(idx, limit: int, oversampling: int):\n",
" scores = np.dot(openai_vectors, openai_vectors[idx])\n",
" dot_results = np.argsort(scores)[-limit:][::-1]\n",
"\n",
" bin_scores = 1536 - np.logical_xor(openai_bin, openai_bin[idx]).sum(axis=1)\n",
" bin_results = np.argsort(bin_scores)[-(limit * oversampling) :][::-1]\n",
"\n",
" return len(set(dot_results).intersection(set(bin_results))) / limit"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## 📊 Results"
]
},
{
"cell_type": "code",
"execution_count": 18,
"metadata": {
"colab": {
"base_uri": "https://localhost:8080/"
},
"id": "qtzUlq_sFTRf",
"outputId": "17fe04ea-4f73-4a57-990b-180f1c04b472"
},
"outputs": [
{
"name": "stderr",
"output_type": "stream",
"text": [
" 0%| | 0/4 [00:00<?, ?it/s]"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"{'sampling_rate': 1, 'limit': 10, 'recall': 0.8}\n"
]
},
{
"name": "stderr",
"output_type": "stream",
"text": [
"100%|██████████| 2/2 [00:33<00:00, 16.98s/it]\n",
" 25%|██▌ | 1/4 [00:33<01:41, 33.96s/it]"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"{'sampling_rate': 1, 'limit': 100, 'recall': 0.708}\n"
]
},
{
"name": "stderr",
"output_type": "stream",
"text": []
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"{'sampling_rate': 2, 'limit': 10, 'recall': 0.95}\n"
]
},
{
"name": "stderr",
"output_type": "stream",
"text": [
"100%|██████████| 2/2 [00:32<00:00, 16.38s/it]\n",
" 50%|█████ | 2/4 [01:06<01:06, 33.26s/it]"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"{'sampling_rate': 2, 'limit': 100, 'recall': 0.877}\n"
]
},
{
"name": "stderr",
"output_type": "stream",
"text": []
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"{'sampling_rate': 3, 'limit': 10, 'recall': 0.96}\n"
]
},
{
"name": "stderr",
"output_type": "stream",
"text": [
"100%|██████████| 2/2 [00:32<00:00, 16.49s/it]\n",
" 75%|███████▌ | 3/4 [01:39<00:33, 33.13s/it]"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"{'sampling_rate': 3, 'limit': 100, 'recall': 0.937}\n"
]
},
{
"name": "stderr",
"output_type": "stream",
"text": []
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"{'sampling_rate': 5, 'limit': 10, 'recall': 0.9800000000000001}\n"
]
},
{
"name": "stderr",
"output_type": "stream",
"text": [
"100%|██████████| 2/2 [00:32<00:00, 16.47s/it]\n",
"100%|██████████| 4/4 [02:12<00:00, 33.17s/it]"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"{'sampling_rate': 5, 'limit': 100, 'recall': 0.977}\n"
]
},
{
"name": "stderr",
"output_type": "stream",
"text": [
"\n"
]
}
],
"source": [
"number_of_samples = 10\n",
"limits = [10, 100]\n",
"sampling_rate = [1, 2, 3, 5]\n",
"results = []\n",
"\n",
"\n",
"def mean_accuracy(number_of_samples, limit, sampling_rate):\n",
" return np.mean([accuracy(i, limit=limit, oversampling=sampling_rate) for i in range(number_of_samples)])\n",
"\n",
"\n",
"for i in tqdm(sampling_rate):\n",
" for j in tqdm(limits):\n",
" result = {\"sampling_rate\": i, \"limit\": j, \"recall\": mean_accuracy(number_of_samples, j, i)}\n",
" print(result)\n",
" results.append(result)"
]
},
{
"cell_type": "code",
"execution_count": 19,
"metadata": {},
"outputs": [
{
"data": {
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"<table border=\"1\" class=\"dataframe\">\n",
" <thead>\n",
" <tr style=\"text-align: right;\">\n",
" <th></th>\n",
" <th>sampling_rate</th>\n",
" <th>limit</th>\n",
" <th>recall</th>\n",
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"text/plain": [
" sampling_rate limit recall\n",
"0 1 10 0.800\n",
"1 1 100 0.708\n",
"2 2 10 0.950\n",
"3 2 100 0.877\n",
"4 3 10 0.960\n",
"5 3 100 0.937\n",
"6 5 10 0.980\n",
"7 5 100 0.977"
]
},
"execution_count": 19,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"results = pd.DataFrame(results)\n",
"results"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"| sampling_rate | limit | accuracy |\n",
"|---------------|-------|----------|\n",
"| 1 | 10 | 0.800 |\n",
"| 1 | 100 | 0.708 |\n",
"| 2 | 10 | 0.950 |\n",
"| 2 | 100 | 0.877 |\n",
"| 4 | 10 | 0.970 |\n",
"| 4 | 100 | 0.956 |\n",
"| 8 | 10 | 0.990 |\n",
"| 8 | 100 | 0.990 |\n",
"| 16 | 10 | 1.000 |\n",
"| 16 | 100 | 0.998 |"
]
}
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