Questions tagged [machine-learning]
Machine learning provides computer algorithms that automatically discover patterns in data and make intelligent decisions from them.
249
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ANN with Backpropagation for MINST data set
I am learning about ANN and tried it for the MINST data sets. Now I am supposted to create a neural network (ANN) with backpropagation.
The structure for the neural network I have is this the input ...
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Train a Keras model to recognize and predict speech in real-time using microphone as audio source
Please help me optimize this script. I'm running it in Google Colab GPU runtime. I've implemented many optimizations but they worsened it. I need serious help. I have to submit my project in 3 days!. ...
1
vote
1
answer
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Optimize an algorithm for preparing a dataset for machine learning
I'm learning how to use R coming from a python background. I'm following Andrej Karpathy's zero-to-hero course, reimplementing it in R.
We start with a list of 32033 names. These names have to be ...
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Object detection YOLO v1 loss function implementation with Python 3 and TensorFlow 2.x
About the code
Object detection YOLO v1 loss function implementation with Python + TensorFlow 2.x. It based on the Pytorch implementations below and re-implemented with TensorFlow based on my ...
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Improving AI model for categorical outcome predictions
I am a novice and would appreciate some guidance. I have been trying to create a machine learning code that will correlatate 10+ binary variable and maybe a couple continuous variables to a binary ( ...
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neural network that determines the gender of a word
I wrote a neural network in python using pytorch, which determines the gender of a word in Russian. As a training set: a file containing a word and a number from 0 to 2 (0-masculine,1- feminine and 2-...
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How to efficiently store and compute forecasting curves?
Let PD be a Plane/Date couple. For each PD, I would like to predict the forecasted booking curve, i.e. the cumuled amount of bookings registered each day between X days before departure and departure. ...
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Plotting correlation matrix with Seaborn and pandas
I try to plot the correlation matrix of a Pandas DataFrame. As the diagonal elements are always ones, and the matrix is symmetrical, so I can get rid of most than a half of the squares without loosing ...
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Machine learning: user-based collaborative filtering
Task:
What to fix in the class, just as a beginner it's hard for me to understand where I messed up?
Code:
Model:
...
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program which select's the ROI from un-stabilized video and Extract the ROI in diff window as stabilized ROI, wants to increase its computation speed
The problem is, program is really lengthy and computationally expensive.
So is there any way to make this program faster or any other way to write this code?
(I am beginner in python and would love ...
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votes
1
answer
969
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Remove background from a directory of JPEG images
I wrote a code to remove the background of 8000 images but that whole code is taking approximately 8 hours to give the result.
How to improve its time complexity? As I have to work on a larger dataset ...
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Implementation of K-Neighbor Algorithm in Python
I would like to get some feedback of my K-Neighbors Implementation using Abalone Dataset and cross-fold validation.
How can I make it more efficient? (No sklearn library allowed)
Where do you see any ...
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1
answer
81
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Decision Tree for classification tasks in Python
I've decided to implement the ID3 Decision Tree algorithm in Python based on what I've learned from George F. Luger's textbook on AI (and other secondary readings). As far as I know, the code is ...
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27
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RESNET machine learning code with TensorFlow
I am a PhD student working on a machine learning project with binary classification and RESNET architecture in TensorFlow. I believe I have done everything correctly but I am looking for some ...
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51
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CodeReview: CycleGAN Implementation Using Keras FunctionalAPI
Okay So I Am Here Implementing the cyclegan architecture with using keras api
from scratch.
For Those who Wanna Know More About Cyclegan seehere
The CycleGan Compose of Two Phase Architecture Like ...
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vote
0
answers
80
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Logistic Regression on Titanic Dataset - Sklearn
The goal of my program is to calculate the chances of a person to survive during Titanic accident, after receiving information such as person's age, class, sex, etc. There's a dataset full of ...
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1
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64
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Linear Regression in Scikit_learn
I have 2 datasets (one for training and the other for testing) containing information about days temperature and humidity; My programm should process the training dataset and find a relation between ...
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1
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Machine Learning Loss Functions In C++
I was looking for C++ versions of the machine learning metrics implemented in Python's sklearn, but they were surprisingly hard to find. I came across a website that had most of the loss functions ...
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0
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103
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Binary classification with pytorch
I wrote a simple neural network binary classification algorithm using Pytorch. It uses the dataset from https://www.kaggle.com/pritsheta/heart-attack, which consists of a table with 300 rows and 14 ...
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1
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libsvm++ : Rewritten libsvm in newer C++
The most famous library for Support Vector Machine (SVM) algorithm is libsvm (https://github.com/cjlin1/libsvm/), but I felt that its code style is too old, I rewrote in newer C++ as a hobby project.
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769
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C++: Linear Regression and Polynomial Regression
I wrote a simple linear/polynomial regressor based on my previous matrix project (https://github.com/frozenca/Ndim-Matrix).
...
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1
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139
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Generating a matrix with each row having normalized weights
I just asked this question over Stack Over Flow on how to improve my code and reposting it here as someone on Stack Overflow recommended this platform.
I have written two python functions and they are ...
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1
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Unsupervised competitive learning algorithm from scratch in javascript
I'm a mathematician who is new to programming and I'm currently reading the book "Theory of Neural Networks" by Rojas. To become better, I try to program every algorithm that is described in ...
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Logistic Regression for Fashion MNIST T-shirt vs. Shirt
I wrote a Logistic Regression for Fashion MNIST to classify T-shirt vs. Shirt.
here is the class
...
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0
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61
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xagents - implementations of reinforcement learning algorithms
Description
It is valid to say, this work started and evolved from a standalone DQN implementation, which I included in an old question, to a mini-library xagents, housing 7 re-usable tensorflow-based ...
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0
answers
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The best tensorflow neural net I got so far for iris dataset
Compared to my another post Logistic Regression for non linearly separable data which uses one-layer net, i.e. Logistic Regression to classify the iris data set, this post is to discuss the tensorflow ...
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1
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81
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Logistic Regression for non linearly separable data
Iris Data Set consists of three classes in which versicolor and virginica are not linearly separable from each other.
I constructed a subset for these two classes, here is the code
...
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0
answers
51
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DQN implementation
I just wrote my pong DQN. It seems to work. I'm looking for a performance based review on anything that might slow down the training in complex models.
main.py:
...
2
votes
2
answers
78
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Updated version of my first neural network in c++
I got lot of suggestions for optimizing my neural network last post I made, now I wanted to post updated version of it were I got rid of most of performance eaters, now I would really appriciate ...
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3
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724
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My first functional naive neural network in C++
I just wrote my first standard neural network with SGD gradient descent in c++, I am really interested if I have done anything wrong or inefficient, suggestions would help me a ton
(There is lots of ...
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0
answers
30
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Logistic regression using Sklearn in Python
I'm trying to learn how to use logistic regression with Sklearn. After learning the theory, I tried implementing it using the Heart Attack Analysis datasheet from Kaggle.
Here's a snippet of the data:
...
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1
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111
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a prototype of finding the (almost) best learning rate and initial weights so that a perceptron converges with the minimal iteration
First of all, I chose the nearest data points/training examples
...
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1
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A simple clusterness measure of data in one dimension using Java - follow-up 2
(See the previous version here.)
This time, I have encorporated all the suggestions made by Marc. Also, I changed the type of points from Double to ...
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1
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A simple clusterness measure of data in one dimension using Java - follow-up
(See the previous version here.)
(See the next version here.)
This time, I have incorporated all the suggestions made by Roman; my new version follows.
...
- 26.7k
7
votes
1
answer
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Optimize K-Mean for large number of clusters
I am writing a Python code for KMeans clustering.
The aim of this post is to find out how I can make my below mentioned code optimal when the number of clusters is very large. I am dealing with data ...
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55
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Keras: Using Autoencoders for prediction
I have a dataset which I divided into two sections horizontally. Column A of first section is the input variable and Column A of second section is the target variable. I am trying to build a Denoising ...
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4
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C++20 : Simple Softmax classifier for MNIST dataset
I wrote a simple softmax classifier to classify MNIST digit handwriting data set. Feel free to comment anything!
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0
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Stacking Classifier Implementation
I was going through the book Hands on Machine Learning With Scikit-Learn & Tensorflow. In one of the chapters, the author mentioned ...
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3
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1
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285
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Pandas replace rare values in a pipeline
A common preprocessing in machine learning consists in replacing rare values in the data by a label stating "rare". So that subsequent learning algorithms will not try to generalize a value ...
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69
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validation and test loss for a variety of PyTorch time series forecasting models
Hi everyone I'm trying to reduce the complexity of some of my Python code. The function below aims to compute the validation and test loss for a variety of PyTorch time series forecasting models. I ...
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52
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Machine Learning Program
I've written a program that finds the difference between data and gives output.
Here's the code:
...
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0
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831
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Model Pipeline to run multiple Classifiers for ML Classification
As a general rule of thumb, it is required to run baseline models on the dataset. I know H2O- AutoML and other AutoML packages do this. But I want to try using Scikit-learn Pipeline,
Here is what I ...
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2
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331
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Multithreaded implementation of K-means clustering algorithm in Java
Hello I have written a multi-threaded implementation of the K-means clustering algorithm. The main goals are correctness and scalable performance on multi-core CPUs. I expect to code to not have race ...
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Looping over files to create a dataframe
As part of my NLP project at work, I want to loop over all files that are either PDF of docx in the same directory. The end purpose is to create a dataframe with text content of the files in one ...
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Optimize binary classification model
I've created binary classification model from scratch, just to understand intuition behind that.
However when I compare my implementation to model from tensorflow/pytorch with the same parameters and ...
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Industrial Practices for Time-Series Forecasting
Hi I have wrote a code here for predicting temperature across months. This is the dataset that I was using: https://www.kaggle.com/sumanthvrao/daily-climate-time-series-data
I have used a SARIMA model ...
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1
answer
166
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Calculation of the Distance Matrix in the K-Means Algorithm in MATLAB
Purpose of the code :
To assign the corresponding label of the centroids to the points which are close to it. Below is a graphical (2D) example.
Variable X is a matrix, rows represent the points, ...
2
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0
answers
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Transfer learning CNNs for image classification in TensorFlow
This code works, and I'm pretty sure it's mathematically/algorithmically correct:
...
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0
answers
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Implementation of Policy Gradient Reward Design paper
I've implemented the first experiment from the Reward Design via Online Gradient Ascent paper. I don't have any specific concerns, but it's my first time using multiprocessing or doing reinforcement ...
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851
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Playing pong (atari game) using a DQN agent
I trained a DQN agent using tensorflow and OpenAI gym Atari environment called PongNoFrameskip-v4, but this code should be compatible with any ...