Industry Classifier
The objective of this project is to build a neural network that can classify a firm's industry based on text of its business description.
| Industry Classifier | |
|---|---|
| Project Information | |
| Project Title | Industry Classifier |
| Owner | Christy Warden |
| Start Date | Spring 2017 |
| Deadline | |
| Keywords | Tool |
| Primary Billing | |
| Notes | |
| Has project status | Active |
| Copyright © 2016 edegan.com. All Rights Reserved. | |
The following projects are dependent on this projects:
New Notes
We're rebuilding the Industry Classifier using better technology and better inputs.
For the inputs:
- Run LoadLongDescription.sql in Z:\VentureCapitalData\SDCVCData\vcdb2
- With sdccompanybase1 table already loaded, load the commented code in that file too
- This outputs longdescriptionindu.txt
Final Product and Use
Description
The final product (as of 2/27/17) is FinalIndustryClassifier.py which is located in McNair/Projects/Accelerators/Industry_Classifier. It takes in an input file of the format Company tab Description and outputs a file called inputfile + Classified.txt. (So if you input Myfile.txt, your output file will be MyfileClassified.txt). This file will be located in the same folder as the FinalIndustry.py code (McNair/Projects/Accelerators/Industry_Classifier).
Use
1) Create a file of the format Company [tab] Description. The description must all be on one line.
2) Copy your file into the folder McNair/Projects/Accelerators/Industry_Classifier
3) Open the file FinalIndustryClassifier.py in Komodo
4) On line 7 of the code, change the words inside the quotation marks to the name of your file. For example, if your file is called MyFile.txt, line 7 should read myfile = "MyFile.txt"
5) Press the play button and wait for "Done!" to print in the output window of Komodo.
6) Open McNair/Projects/Accelerators/Industry_Classifier and find the file called "(the name of your file)Classified.txt" (aka MyFileClassified.txt)
7) Open this file (IN TEXTPAD). It should be your output of the format Company [tab] Classification.
Command Line Use
A command line program exists for this tool. To use it, open the Command Prompt and change directories to:
E:\McNair\Projects\Accelerators\Industry_Classifier
To run the program, enter:
python FinalIndustryClassifier_command.py
A prompt will appear asking you to enter an F or S. F stands for File Input, and S stands for Single Use. If you select F, a prompt will appear asking you to enter an input filename, and an output filename, separated by a space.
Possible Tools
Python Tools
SciKit Learn SVM
http://scikit-learn.org/stable/modules/svm.html#svm
It's complexity is between O(n^2) and O(n^3). Seems easy to use. This is not a neural net; it is a support vector machine.
SciKit Learn Neural Net
http://scikit-learn.org/stable/modules/neural_networks_supervised.html
This IS a neural net using back propagation.
It's complexity is listed as: Suppose there are n training samples, m features, k hidden layers, each containing h neurons - for simplicity, and o output neurons. The time complexity of backpropagation is O(n * m * h^k * o * i), where i is the number of iterations. Since backpropagation has a high time complexity, it is advisable to start with smaller number of hidden neurons and few hidden layers for training.
WE ENDED UP USING THIS ONE
SK Neural Network Package
This is a separate package than listed above. It requires a separate installation. Documentation is provided at:
https://scikit-neuralnetwork.readthedocs.io/en/latest/index.html
We ran into deprecation warnings, and the program would not execute due to a missing g++ drive.
R Tools
R seems to have a built in package called "neuralnet".
An example is given at:
https://www.packtpub.com/books/content/training-and-visualizing-neural-network-r
Scripts
Scripts and data for this project are located in:
E:\McNair\Projects\Accelerators\Code+Final_Data\ChristyCode
Industry Classifier
This is a neural net built in python that trains on industry designation data from the SDC Platinum database. It serves as a predictive model to predict the industry allocation of given companies. The file is located in the directory listed above.
FindTrainData.py
Builds a tab-delimited text file containing 200 companies with each Industry classification (i.e. 200 biotech, 200 media etc). Hopefully if we use this as our training data, we will get more accurate classifications.
FixDescriptions.py
Deals with the problem that by output files from SDC are poorly formatted when the description goes beyond 1 line. Outputs a tab-delimited text file where the whole description is on the same line and can be read.
Addresses.txt
This text file contains investment info, name, address, city, state of Portfolio companies.
Descriptions.txt
This text file contains company, short description, major industry, minor industry of Portfolio companies.
Statistics
Stastical methods for analyzing results from a neural network.
Quick Check using excel; Finding number of correct matches between two columns:
=SUMPRODUCT(--(range1=range2))
See an example here.
Comments and Thoughts
2/17/17
Christy: No matter what parameters I change in the NN, I can't get the accuracy to go up above around 30%. Looking at the descriptions that the classifier fails on, I realized that it pretty much guesses randomly a lot of the time when the descriptions are terrible like "We provide services to our customers." I think we need to be training and classifying based on the longer description, which is why I started working on the FixDescriptions.txt script.
2/27/17
Christy: The pickle library is vital and we should remember to use it when we use black boxish libraries like the sklearn classifier.
