All Questions
Tagged with predictor or machine-learning
682 questions
9
votes
2
answers
802
views
A strategy to create good initial guess for Lorentzian model fit
I was preparing an answer for a question that got deleted, so I will post this anyhow.
Given a set of data with a hump
...
- 37.4k
9
votes
1
answer
604
views
Why is SVM unable to separate linearly separable data?
I have two sets of data, namely blue and yellow. I manually added a point {8, -3} to the blue data.
...
- 3,509
9
votes
3
answers
936
views
Example of NetChain running in MXNet cause Error
Cross post here
Problem remains in Mathematica 11.2
First defining the net
...
- 6,866
9
votes
2
answers
327
views
Can I use Mathematica to generate candle scents?
I found this blog (which is highly entertaining). It has an interesting post where the author uses the GPT-2 neuro-network with candle scent training data to generate new candle scents. The AI comes ...
- 4,778
9
votes
2
answers
677
views
How do I access the parameters in Classify using Support Vector Machine as method?
I have a dataset that I want to classify and I do the following:
clf = Classify[xtrain -> ytrain, Method -> "SupportVectorMachine"]
How can I use my own ...
- 205
9
votes
1
answer
1k
views
How to find multi-word synonyms?
I’m looking to write a semantic distance function for phrases (5 words or less) that can map multi-word synonyms together. My domain is e-commerce fashion - here are some required examples for a ...
- 31.8k
9
votes
1
answer
999
views
How do I implement masked Softmax?
Consider:
input = {1, 2, 3};
mask = {1, 0, 1}
Classic Softmax:
SoftmaxLayer[]@input
{0.0900306, 0.244728, 0.665241}
...
- 9,621
9
votes
1
answer
3k
views
Fashion segmentation with a neural net?
I would like to train a network that can parse clothing:
Does anyone know of a fashion segmentation network with or without pre-trained weights available that I can use in Mathematica?
Update:
I ...
- 31.8k
9
votes
2
answers
400
views
Options for ValidationSet accuracy from NetTrain?
With NetTrain[] if you use the option ValidationSet->Scale[.1] it will run a validation test on 10% of the training data ...
- 31.8k
9
votes
1
answer
268
views
Adding computer vision datasets?
I find having ResourceData/Objects for machine learning datasets to be extremely useful, with their "TrainingData", "TestData" properties:
Right now there's only a handful:
And even fewer for ...
- 31.8k
9
votes
1
answer
152
views
Can Mathematica Neural Net make use of the REC file format for images like MXNet?
When using large set of images for training neural networks (>10000, size 250 x 250 each) the time to read the images is quite long.
My first approach was to use the DataSet functionality of ...
- 131
9
votes
1
answer
311
views
How to implement BlazeFace?
BlazeFace is a lightweight and well-performing face detector tailored for mobile GPU inference. It runs at a speed of 200-1000+ FPS on flagship devices. How to implement BlazeFace in Mathematica?
- 9,621
9
votes
1
answer
682
views
What does the value of Predict's "L2Regularization" correspond to?
What does the value supplied to the Predict Method option "L2Regularization" correspond to?
...
- 12.9k
9
votes
1
answer
278
views
Regarding Gaussian Process in Predict function
The following code is exactly copied from the documentation on Predict using Gaussian Process.
...
- 143
9
votes
0
answers
394
views
How to extract tree parameters from RandomForest?
I want to extract the parameters of a decision tree from the object estimated by Classify[].
It seems that parameters of the estimated Classifier are available in the "Models" property. It is ...
- 2,016
9
votes
0
answers
235
views
What are the time and space complexities of Classify/Predict?
Does anyone have knowledge of the O(n) time & space complexities for various model types supported by Classify[] and ...
- 31.8k
9
votes
0
answers
359
views
Exporting Classify Models
Currently I have created a simple classifier to classify sentiment from a string of text (or a tweet). The code is very basic and looks something like this:
...
- 381
8
votes
2
answers
853
views
Training data generator?
Python has generators which save memory, is there a technique for generating in memory examples for your training set "on the fly".
For example purposes, I constructed here a regressor for blur:
<...
- 3,820
8
votes
3
answers
592
views
Locally Weighted Linear Regression
I am following the online Stanford Course in Machine Learning and I am trying to implement the algorithms on the fly in Mathematica.
Currently, I have issues with minimizing the Locally Weighted ...
8
votes
2
answers
703
views
Staged training of Neural Networks
From what the documentation says about NetTrain and NetInitialize and what the progress indicator shows when reevaluating ...
- 8,529
8
votes
1
answer
509
views
Neural net example not working
Bug introduced in 11.0.0 and fixed via paclet update
The Wolfram Mathematica site provides this example.
I have copied and pasted into a notebook. The resource is reached and correctly sampled.
...
- 65k
8
votes
1
answer
758
views
Which GPUs does NetTrain work with?
NetTrain's option TargetDevice -> "GPU" works for old macbooks that have GEForce GT 750m cards (like mine), but what about other nvidia cards?
Does it (or will ...
- 3,820
8
votes
2
answers
2k
views
How to do $ n $-fold cross validation with Classify?
Other machine learning libraries have utilities to generate indices that can be used to generate dataset splits according to different cross-validation strategies. How do I tell ...
- 31.8k
8
votes
1
answer
277
views
Dilation on 3D Images?
I need to apply a dilated convolution to a 3D image, but dilation values greater than 1 are not currently supported in v11.3:
...
- 31.8k
8
votes
1
answer
739
views
NetTrain automatic settings
I'm trying to compare Mathematica's NetTrain with other algorithms, and I used Automatic settings as they were working quite ...
- 999
8
votes
2
answers
341
views
Predict: How to customize model construction? (e.g. cross fold validation, mtry, number features used, ROC curve)
Question Overview
In general this question is in regards to how to tweak the parameters used when one specifies a Method when calling the Predict function. Herein ...
- 5,442
8
votes
2
answers
945
views
Resources to learn about Neural Nets using Mathematica?
I'm interested in learning about Neural Nets and I'd really like my instruction to be in Mathematica if possible.
For instance, a tutorial like this one: http://neuralnetworksanddeeplearning.com/...
- 570
8
votes
1
answer
656
views
Batching in inference and support for multiple GPUs
I know that Mathematica supports GPU inference, and can be told which GPU to run models on by specifying TargetDevice->{"GPU",2} or such.
My questions are as follows:
1) By using the above statement ...
- 278
8
votes
1
answer
1k
views
Use autoencoder for dimensionality reduction
I have been trying to follow this tutorial (https://www.wolfram.com/language/11/neural-networks/unsupervised-learning-with-autoencoders.html?product=mathematica) to train an autoencoder in Mathematica,...
- 3,167
8
votes
1
answer
459
views
How to use XGBoost from within Mathematica?
Is there an easy and efficient way to use XGBoost from within Mathematica without naively Import/Exporting the data? Does anyone know of a third party package or any example applications of ...
- 31.8k
8
votes
2
answers
172
views
Kernel shut down when use FindFaces with LBP Cascades
I found Mathematica can use OpenCV to improve face recognition in FindFaces: how to improve the results of the face recognition feature.
But I tried this way and the kernel crashed.
...
- 3,896
8
votes
1
answer
5k
views
How to train Sequence-to-sequence autoencoder using LSTM?
According Keras blog,I find the Seq2Seq auto-encoder.
But it didn't give any example only code.
To build a LSTM-based autoencoder, first use a LSTM encoder to turn your input sequences into a ...
- 6,866
8
votes
1
answer
209
views
How to extract of sub-net of NetGraph correctly?
net = NetGraph[{3, 5, 8}, {1 -> 2 -> 3}, "Input" -> 2]
Take[net, {1, 2}]
But ...
- 6,866
8
votes
1
answer
215
views
8
votes
1
answer
187
views
Optimize a network topology?
I'd like to know if one can use optimization function like Maximize[] or BayesianMaximize[] to optimize the hyper-parameters of ...
- 3,820
8
votes
1
answer
385
views
Memory leak in NetTrain?
Issue
NetTrain seems to leak memory.
Example
We define a simple NetChain:
...
- 4,694
8
votes
1
answer
226
views
How to make classification results replicable?
Let's suppose I have a simple classification problem:
...
- 195
8
votes
1
answer
337
views
Is the Method -> Automatic option for Classify not deterministic?
I just prepared an (well known) example in machine learning, the weather dependent determination of whether to play golf or not, as shown in this picture (of a corresponding Dataset)
Now I set up ...
- 5,623
8
votes
1
answer
475
views
How to know the internal pre-processing of automatic machine learning function `Classify`?
In the Highly automatic machine learning page, it is said the function like Classify and Predict will do things like automatic ...
- 1,582
8
votes
1
answer
743
views
Using Predict on images
I have a dataset of some (grayscale) images (stored as a list in inputImages) varying in size and content (this is example data from Wolfram, so you can run the ...
- 2,740
8
votes
1
answer
724
views
Train your own CycleGAN style translator
I have a set of images (a few hundred) that represent a certain style and I would like to train an unpaired image to image translator with CycleGAN.
I'm looking for a tutorial on how one would do ...
- 3,820
8
votes
1
answer
177
views
How to use a remote windows laptop for NetTrain?
I have a windows 10 laptop (with a gpu) at home and a macbook at my office, both with v11.3.
What are steps to use the windows machine remotely for training? That is, I want to launch and run ...
- 3,820
8
votes
0
answers
156
views
Slow down training many neural networks (Bug?)
I am working on something in which I need to train a neural network many times with slightly different training data. I noticed that after many training runs the input rate had dropped significantly.
...
- 363
8
votes
2
answers
388
views
How to recreate this 3D plot?
In other languages, one can make a FeaturePlot3D-esque graphics where the inset images look realistically three dimensional. Meaning that they are smaller when farther away (and also hazier).
So how ...
- 31.8k
8
votes
0
answers
433
views
Use of new machine learning capability for search problems (reinforcement learning)
I work with search algorithms, often of an adversarial nature, and want to understand how to apply Mathematica's machine learning capabilities, especially those new in version 11, to this type of ...
- 4,102
8
votes
0
answers
592
views
FindFormula Control [closed]
FindFormula is great start on the path to full symbolic regression and I realize it's level of development is only experimental at this stage. But if I happen to ...
- 1,417
7
votes
3
answers
888
views
how to take ImageFeatures?
I want to know how to transform images to feature vector.
There is a function FeatureExtractor.And it has some methods.
...
- 449
7
votes
2
answers
204
views
Impact of Linkage and DistanceFunction on Agglomerate clustering
I'm using Agglomerate function to find clusters of my experimental points. I have about 20 points with 10 parameters each. It seems it works fine, but there are plenty of Linkage and DistanceFunction ...
- 3,511
7
votes
1
answer
639
views
Using ImageIdentify
How long does it take ImageIdentify to give an answer for one image? Also, I suppose using it requires an Internet connection with Wolfram servers. Is that correct?
- 7,164
7
votes
1
answer
436
views
Implementing Resnet as a NetGraph?
Does anyone know of a Mathematica v11.1 implementation for any of the Resnets, e.g. a NetModel or WLNet for Resnet-1000?
Loading the MXNet weights from the model zoo for both resnet or resnext doesn'...
- 31.8k