All Questions
Tagged with machine-learning or machine-learning
682 questions
7
votes
3
answers
253
views
How to identify and select the first name from a string containing a first name and a last name?
Is it possible to identify and select the first name in a string that is made up of a first name and a last name, e.g.:
...
- 446
7
votes
2
answers
326
views
How to Classify with LogisticRegression with a non linear border?
I am currently taking the Coursera Machine Learning course and want to reproduce some of the coding exercises in Mathematica.
In Exercise 2 the problem is to Classify with Logistic Regression. So I ...
- 678
7
votes
2
answers
142
views
ClassifierInformation's "ClassPriors" misreporting?
To the TLDR people
It seems to me that when you explicitly set ClassPriors when running Classify, it creates a ...
- 42.8k
7
votes
1
answer
195
views
7
votes
1
answer
325
views
NetPortGradient output port restriction
The documentation for NetPortGradient says
net[<|..., NetPortGradient[oport] -> ograd|>, NetPortGradient[iport]] can ...
- 1,244
7
votes
2
answers
1k
views
Importing multiple images for machine learning classification
I want to create a ML classifier using images just like this example.
I have two classes of images in two different folders. Is there an easier way to import all images from both folders rather than ...
- 173
7
votes
1
answer
983
views
How to find similar words from the provided list?
Let's say I have created a list of words that are acceptable in a certain context.
list = {...};
Now given a new or some existing word from the list I want to ...
- 9,751
7
votes
1
answer
772
views
Specifying mean and kernel function in Gaussian Process
As part of the Improved Machine Learning in Mathematica 11, Wolfram advertises the Method "GaussianProcess" which can be used with Predict[] to obtain smooth Gaussian random fields. The screenshot ...
- 1,991
7
votes
1
answer
702
views
How to ImageIdentify multiple objects in a single image?
Suppose an image has multiple objects:
ImageIdentify only finds the banana:
...
- 1,641
7
votes
1
answer
901
views
Classify the classic tennis example
When using the classic tennis data (reference here) with Classify
...
7
votes
1
answer
195
views
Machine learning: How to fix part of the weight matrix?
Consider a linear layer with 2*2 weights
linear = LinearLayer[2, "Input" -> 2];
net = NetInitialize[linear];
After the initialization, the four elements of ...
- 85
7
votes
1
answer
127
views
How to calculate a PDF of a neural network output?
I have to find the probability density function of the output of an internal layer in a neural network.
I wanted to do it using NetMeasurements adding a layer like
<...
- 215
7
votes
1
answer
178
views
Running Mathematica in 'SpouseMode'
In this previous question I looked into a deprecated capability of Mathematica from Version 2.
Mathematica command that allows it to read my intentions
Thanks to all for your answers. I note that ...
- 7,213
7
votes
1
answer
294
views
Decoding Music in Staff Notation using ImageIdentify
I wrote this Code fragment
Which is a E (quarter) note in Treble Clef. Instead Mathematica simply classified it as a "musical note"
Can we do better?
- 1,708
7
votes
1
answer
156
views
Logistic Regression classifier in Versions 12 vs 11.3
There is a mysterious "LogisticRegression" method in MMA, which could be applied as a substitution for missing multinomial logit functionality.
In version 11.3 I had the following simple 3-category ...
- 4,895
7
votes
1
answer
362
views
Building a classifier for images
I tried to build a classifier for some images that I have with the following code:
...
- 1,040
7
votes
0
answers
331
views
Use of Mathematica for Machine Learning Course [closed]
I am interested in others' experience using Mathematica for machine learning and bioinformatics course curricula. Let me first say that I have been programming with MMA for almost 10 years now (out ...
- 913
7
votes
0
answers
159
views
How to extend ImageCases?
I was very excited to see ImageCases being documented in version 12. But I immediately desired a mechanism for adding more entities to ...
- 31.8k
7
votes
1
answer
772
views
Image Generator with a Neural Network (CIFAR-10)
As some of you may know, CIFAR-10 is a data base which has 60,000 images (which are 32x32 in size) of 10 different categories (airplane, dog, cat, frog, deer, bird, horse, ship, automobile and truck). ...
6
votes
5
answers
1k
views
6
votes
1
answer
374
views
FindFaces in Mathematica 11.3
I just upgraded to Mathematica 11.3. but now my FindFaces instructions do not work anymore.
I guess they changed the syntax in 11.3.
Here is the original code:
<...
- 3,093
6
votes
1
answer
780
views
Sentiment analysis of tweets
I want to use Mathematica for a sentiment analysis on tweet-messages. For that purpose i selected several tweets. Each tweet is interpreted by myself as positive (pos) of negative (neg). For example:
...
- 2,855
6
votes
1
answer
1k
views
Save neural network after training
I've written quite a few projects that involve training a neural network through the Classify and Predict functions, but every ...
- 539
6
votes
1
answer
539
views
Extract neural network model from ClassifierFunction
I'm very new to Neural Networks and Mathematica 11 (I used MMA8 some time ago) and I'm trying to learn about NN using Mathematica. I'm using MMA 11.2 in a Rapsberry Pi (yes, I know that doing NN in a ...
- 253
6
votes
1
answer
2k
views
How to make a switch in Neural Networks?
In this paper,they design a network like this.
The left(green) is a normal network that mapping one feature to another feature,the right(red) side is an autoencoder(using RNN).But a switch is ...
- 6,866
6
votes
1
answer
115
views
Which, if any, external machine learning libraries are used by Predict[]?
It's pretty much all in the title -- I suspect that Wolfram uses some standard (perhaps open-source) libraries in their machine learning functions, and I am curious as to what they are.
I am ...
- 4,715
6
votes
1
answer
723
views
Unsupervised Machine Learning Algorithm for Autonomous Image Processing and Tracking
I am trying to prototype a Mathematica application that will enable Autonomous Intruder & Anomalous Event Detection, Tracking and Alarm to web users those who want to autonomously and ...
- 61
6
votes
1
answer
104
views
Predict failed to reproduce result of multiple linear regression
I would like to reproduce the result of multiple linear regression with Predict. In approach 1, I used matrix computation and obtained ...
- 3,509
6
votes
1
answer
1k
views
Is it possible to fix the weight of a certain layer during neural network training?
As suggested by the title, is it possible to fix some part of the neural network while training?
Since Mathematica provides a way to extract part of a neural network and combine it with some layers ...
- 269
6
votes
2
answers
4k
views
Neural network: Line detection in Image
I am playing around with Mathematica's new Neural Network toolbox and am trying to teach a network to detect lines in quite noisy images.
An example Input image would look like the following:
The ...
- 1,535
6
votes
1
answer
221
views
Introductory material on machine learning?
Does Mathematica have a handbook or other introductory material on machine learning? Or are there any books on analyzing machine learning with Mathematica?
- 61
6
votes
1
answer
1k
views
How do I create & train a neural net to predict a stock closing price at T+5min using OHLC and other data?
I'm trying to create a neural network and train it to test predictability of short term stock price movements.
I've collated a 1-min open, high, low, closing and volume dataset for a particular stock....
6
votes
1
answer
340
views
Named entity recognition
How can one process natural language (English) to extract named entities (aka NER)? Or at least, entities which can be mapped to a Mathematica Entity. Note that trying to map entities via simple ...
6
votes
1
answer
221
views
Is it possible to convert the result of NetTrain to a PredictorFunction?
I would like to use PredictorMeasurements on the result of NetTrain, but it says it expects a ...
6
votes
1
answer
188
views
Unexpected high memory consumption using out-of-core NetTrain
I'm working on training a neural network on an image dataset. There are 14k images and each image contains 3x150x150 pixels. I have built a generator function following the approach in Training on ...
- 544
6
votes
1
answer
387
views
What are the possible values of sub-options for Classify[]?
Specifically, how can I find the possible values of sub-option "KernelType" of option "Method" for Classify? Here's an example:
...
- 3,820
6
votes
1
answer
157
views
Graph Convolution Network, molecule activity
I am trying to translate an example code for graph convolution network from Deep Learning for Physical Scientists: Accelerating Research with Machine Learning.
Edward O. Pyzer-Knapp et. al. They have ...
- 739
6
votes
1
answer
218
views
Compute neural network loss over sliding windows?
I am trying to use the structural similarity index, which is defined in terms of a computation over sliding windows, as a neural network loss function.
Obviously one can get a sliding mean using a <...
- 1,138
6
votes
1
answer
792
views
Classify Function : Sentiment Polarity
I have been working on a project involving the new Classify[] function. More specifically, the sentiment analysis function.
It works perfectly well, as in the documentation:
...
- 319
6
votes
1
answer
283
views
6
votes
1
answer
807
views
How to import/export to libsvm?
Under the hood Mathematica uses libsvm, so I don't think this question is beyond the pale.
I need to export an svm I trained with Classify to the standard SVM Format (which is readable by libsvm).
...
- 31.8k
6
votes
1
answer
542
views
How do I generate SMILES using machine learning in Mathematica?
I am wondering if anyone has experience with generating molecules using machine learning in Mathematica. There are a bunch of papers these days with such applications/developments. For example, https:/...
- 739
6
votes
0
answers
287
views
Any competitive speech-to-text models?
SpeechRecognize is not very useful compared to most voice transcription engines nowadays, simply too fragile and prone to errors.
I use Otter.ai currently, is there anything competitive to that (or ...
- 3,820
6
votes
0
answers
238
views
How to perform feature selection for machine learning applications?
Feature selection is fairly easy in e.g. Python's scikit-learn which sports a module and tutorials or MATLAB.
Mathematica even touts that it uses feature selection ...
- 553
6
votes
0
answers
315
views
6
votes
0
answers
186
views
How can I prevent errors with ReplicateLayer[]?
I am trying to build a NetGraph[] that takes input of the form {{0.6},{0.6},...,{0.8},{0.8}} and multiplies the last sequence ...
- 1,447
6
votes
0
answers
118
views
How can one train a Neural Network in Mathematica such as to recognise and count all occurrences of a certain custom category in an image?
I'm trying to use Mathematica for the following task:
(1) Get an aereal view of a certain area in Mongolia
(2) Count the number of plots that contain houses, and the number of plots that contain ...
- 61
6
votes
0
answers
170
views
Export ImageCases to Python?
I’d like a tutorial on how to export a bounding box detector network to mxnet, (for bonus points: convert to Tensorflow), and then get it running correctly in python!
Some related questions exist for ...
- 31.8k
6
votes
0
answers
246
views
Can I use Mathematica ML capability to translate an image of a formula?
If I am given a pdf image of a mathematical symbolic formula can I translate it into Mathematica syntax using ML?
I tried using Classify, but I can only translate parts of the equation and I don't ...
- 517
6
votes
0
answers
367
views
How "good" is the new Classify and how does it choose its method
I recently read the blog regarding data-science Wolfram Blog and then checked the quality of the new Classify. I have a bunch of slides that I show to my students ...
- 5,623