Questions tagged [machine-learning]
Machine learning provides computer algorithms that automatically discover patterns in data and make intelligent decisions from them.
185
questions
-4
votes
0answers
16 views
Is this code for Gaussian Mixture Model correct? [closed]
I am learning GMM to do color segmentation. I found a good resource online with the following GMM code:
...
2
votes
0answers
30 views
simple neural network in python
I've spent the last few days learning the beginnings of how to implement a simple neural network. I've gone through chapters 1 and 2 of this book and have tried to write my own NN with referrals to ...
2
votes
0answers
38 views
ML text generating code with Python and Tensorflow
I wanted a simple code review for improvement to increase the efficiency of my text generating model. This model is taken from the official TensorFlow site but is being trained on different datasets. ...
3
votes
1answer
26 views
Creating generator object with image augmentation to train Convolutional Neural Networks with Keras
I am currently self-studying on Python generator object and use it to generate training data and do augmentation on-the-fly, then feed it into Convolutional Neural Networks.
Could anyone please help ...
2
votes
0answers
28 views
Sklearn Custom Imputer from prediction
I asked this question on Stackoverflow, but thought it might be a better fit here.
I'm playing around with the titanic dataset, and wanted to create a custom imputer to fill in missing ...
2
votes
0answers
33 views
Get most similar element in an array of string with another string
I have a code to get most similar element in an array of categories of jobs to another job using Google's Universal Sentence Encoder.
...
3
votes
0answers
27 views
PPE object detection with tensorflow and opencv with rtsp streams
I am working on an object detection API implemented in Tensorflow 1.14 and OpenCV 4.1, where my task is to recognize personal protection equipment (PPE) worn by workers at various construction site ...
2
votes
1answer
39 views
Re-write custom feature encoding function python
I have a question regarding code quality and best practices. My task - to write a feature encoding function that will encode categorical labels, boolean labels as one-hot encoding, timestamps for ...
3
votes
1answer
101 views
Implementation of K-means
I have recently built a class that is an implementation of kMeans from scratch. I believe there is room for improvement and I would happily receive some feedback. The project can be found at: https://...
2
votes
1answer
54 views
Forecasting stock market data using Support Vector Regression
I coded this Support Vector Regression (SVR) myself following some equations in a journal (see here, or here (not in English)). The loss function used by the journal and the code below is mean ...
0
votes
0answers
22 views
Sequential learning function running slowly
I'm new to Python and made this Sequential Learning function but it runs slowly. Do you know why this runs slowly and how to improve it?
...
3
votes
1answer
60 views
Estimation of min_samples for DBSCAN
I'm attempting to speed up some python code that is supposed to automatically pick the minimum samples argument in DBSCAN. Currently the execution time grows exponentially as the number of training ...
3
votes
1answer
58 views
Slow python code that automatically selects k for KNNG
This code is used to select K for a K-nearest neighbor graph [KNNG] from a dataset with an unknown number of centroids (which is not the same as K-means clustering).
Suppose that you have a dataset ...
2
votes
0answers
79 views
Multi-threaded HD Image classifier using a neural network
This is a follow up to the code found here:
Multithreaded HD Image Processing + Logistic reg. Classifier + Visualization
Description:
This code takes a label and a folder path of subfolders as ...
7
votes
0answers
144 views
Multithreaded HD Image Processing + Logistic reg. Classifier + Visualization
[I'm awaiting suggestions for improvement/optimization/more speed/general feedback ...]
This code takes a label and a folder path of subfolders as input that have certain labels ex: trees, cats with ...
3
votes
1answer
94 views
Gradient Descent Algorithm using Pandas + GIF Visualization
Happy new year everyone, Following Andrew NG's course on coursera here's my implementation for the gradient descent algorithm(univariate linear regression) in Python using pandas, matplotlib with ...
1
vote
0answers
155 views
Keras stacked LSTM model for multiclass classification
I am working on a multiple classification problem and after dabbling with multiple neural network architectures, I settled for a stacked LSTM structure as it yields the best accuracy for my use-case. ...
2
votes
1answer
71 views
Java Neural Network Implementation
I have recently tried to get a better grip on machine learning from a point of implementation - not statistics. I've read several explanations of an implementation of a Neural Network via pseudocode ...
7
votes
1answer
160 views
Portfolio optimization using genetic algorithm
I'm working on a (naïve) algorithm for portfolio optimization using GA. It takes a list of stocks, calculates its expected returns and the covariance between all of them and then it returns the ...
2
votes
1answer
46 views
Optimizing a TFxIDF vectorization - Python 3.x [closed]
I am attempting to train many classifiers to test their performance with classifying tweets as being from a political bot, or not (a binary 0 or 1 classifier).
My ...
1
vote
0answers
78 views
Homemade web-scraper that feeds perceptron with hidden layer [closed]
I’d like to start by apologising for the mess that is my code. I know that it’s really hard to parse, inefficient, and probably not idiomatic. I just don’t know how to fix it which is why I'm here.
...
-1
votes
1answer
34 views
How to write a multivariate multi-step forecasting from a multivariate single step [closed]
I'm trying to implement a multi-variate, multiple-step model to forecast the day ahead electricity prices (h+1,h+2,...,h+24). I know how to do one forecast, but I'm confused with how to implement a ...
2
votes
1answer
51 views
K_nearest_neighbors from scratch [closed]
I wanted to create a script that will perform the k_nearest_neighbors algorithm on the well-known iris dataset. This was mainly for me to better understand the algorithm and process. I think it works, ...
1
vote
0answers
53 views
condensed nearest centroid classifier in numpy
This is my attempt to write a numpy-optimized version of a nearest centroid classifier to classify some images from the MNIST data set of handwritten digits. I am ...
1
vote
0answers
53 views
Recommender system accuracy testing using GridSearchCV [closed]
I'm trying to improve my Alternating Least Squares (ALS) model performance by testing using different model parameters, but the model performance is seemingly very low.
Since the Alternating Least ...
1
vote
0answers
70 views
Neural network from scratch in Python
So after watching week 5 of the machine learning course on Coursera by Andrew Ng, I decided to write a simple neural net from scratch using Python. Here's my code:
...
1
vote
0answers
54 views
Stochastic gradient descent - backpropagation over mini-batches in one go
I have been working through a tutorial on neural networks. I have then been translating the code to java, to help improve my understanding of what the code is doing.
The book mentions a way of ...
-1
votes
1answer
60 views
Python ANN Implementation [closed]
I recently learned about backpropagation online and tried to implement it. I am not sure I have it correct yet. I am confused and would love a second pair of eyes on this code. Please help me ...
2
votes
0answers
67 views
GRU-Autoencoder training
I'm training a GRU auto-encoder and my current code is very slow.I believe it's predict_captions function that takes most the time. Any suggestion to optimize this code?
...
2
votes
1answer
584 views
Simple Genetic Algorithm in Python
For past few months I was trying to understand genetic algorithms (GA) and most of the materials availble in the web was not always easy for me. Then I came across this article written by Ahmed Gad ...
1
vote
2answers
2k views
Simple Linear Regression in C++
Python has amazing sci-kit learn library but I am building some projects on C++ with involves some machine learning algorithms. I found machine learning libraries in C++ involves more dependencies so ...
3
votes
0answers
49 views
Automated machine learning training and evaluation in Sagemaker with XGBoost
This code aims to make very easy to train new models in SageMaker and quickly decide whether a new feature should be introduced in our model or not, getting metrics (recall, accuracy and so on) for a ...
2
votes
1answer
62 views
Manual Regression Tree using Python
I wrote a code to create a regression tree for a synthetic train data of size Np. The idea is, first I have the source node (which consists of all set of points) ...
2
votes
0answers
75 views
Machine learning, kNN and Naïve Bayes algorithm
This is the task I am working on:
In this assignment you will implement the K-Nearest Neighbour and Naïve Bayes algorithms and evaluate them on a real dataset using the stratified cross validation ...
2
votes
0answers
107 views
Plant pest detection using CNN
I am doing a project in plant pest detection using CNN. There are four classes each having about 1400 images. While training the model using Convolution Neural Network, there is a smooth curve for ...
4
votes
1answer
301 views
Simple decision tree in Haskell
I've been trying to get better at Haskell for a while, and have recently been working on a lot of small projects with it. This constructs a binary decision tree.
The command to run it is:
...
1
vote
0answers
62 views
Modified and created a new python class for generating a report of metrics for machine learning
I initially posted a question on SO. I have come up with an answer for the same. Basically, given two dicts of models and parameters, user can create an object, and get the report in 5 steps.
...
5
votes
1answer
66 views
Simple SVM in MATLAB
I'm studying SVMs and wrote a demo in MATLAB (because I couldn't get a quadratic programming package to work correctly in Python). Right now it's simple and can only do linearly-separable cases (...
1
vote
0answers
123 views
Chess Agent using reinforcement learning with monte carlo tree search
I wanted to ask if this project is valid to state on a resume for entry-level python developer and if the code is presentable to say a job interviewer.
github link: full project
(If this is not the ...
2
votes
1answer
61 views
User-Interactive Data Cleaning Program in Python
I'm trying to develop a program in Python that allows the user to import datasets and perform operations on them using pandas and numpy so she/he can skip writing all the preprocessing code her/...
0
votes
1answer
48 views
A simple clusterness measure of data in one dimension using Java
Problem definition
Given \$X = (x_1, \dots, x_n)\$ such that \$x_1 \leq x_2 \leq \dots \leq x_n \$. Let \$x_{\min} = \min X = x_1\$, \$x_{\max} = \max X = x_n\$ and \$r = x_{\max} - x_{\min}\$. Also, ...
0
votes
1answer
504 views
Predicting credit card default
I have this code for predicting credit card default and it works perfectly, but I am checking here to see if anybody could make it more efficient or compact. It is pretty long though, but please bear ...
3
votes
0answers
480 views
A simple toy ResNet model and its implementation
I want to understand how resnet works also called us residual networks and I understand it better when I code one myself. I tried to find a simple implementation of resnet in the web but most I found ...
1
vote
0answers
88 views
Posterior collapses in an RNN variational auto-encoder - PyTorch
I am trying to implement and train an RNN variational auto-encoder as the one explained in "Generating Sentences from a Continuous Space". Although I apply their proposed techniques to mitigate ...
4
votes
1answer
61 views
Set of one-hot encoders in Python
In the absence of feature-complete and easy-to-use one-hot encoders in the Python ecosystem I've made a set of my own. This is intended to be a small library, so I want to make sure it's as clear and ...
1
vote
0answers
44 views
Custom Vector and Matrix classes in python for machine learning
I am creating a machine learning tool set from scratch in python. I have never done something of this kind and I don't usually use python but I thought it would be good to expand my horizons. I am ...
1
vote
0answers
221 views
Tensorflow model for predicting dice game decisions
For my first ML project I have modeled a dice game called Ten Thousand, or Farkle, depending on who you ask, as a vastly over-engineered solution to a computer player. You can find the complete game, ...
1
vote
0answers
63 views
Get stacked game state in NHWC format
After reading this, I decided to transition my DQN code from the keras library to tf.keras library (code is located in this repo) and my original code used NCHW format, as it was faster with GPUs. As ...
3
votes
0answers
944 views
Auto classification of my bank transactions
This is my first Machine Learning algorithm using Python and SkLearn. The code works, which is pretty awesome. I'm getting about 65-70% of accuracy after training it with about 4k rows of data.
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5
votes
1answer
333 views
Reinforcement Learning for Flappy Bird in JavaScript
To give a bit of a background, I'm organizing a small session about reinforcement-learning, specifically Q-learning, to a group of high school students in the ...
