Questions tagged [machine-learning]

Questions about machine learning functionality of Mathematica, for instance involving, but not restricted to, Predict, Classify, FindClusters and the various regression functions.

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30 views

BatchNormalizationLayer , what is it? and how do I use it?

I thought a BatchNormalizationLayer 'normalizes' the input stream; ie I thought it scales the data somehow to fall between [0,1]... but I've tried using it and it ...
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65 views

Recognising people from photos

I have a large number (probably 10000) of personal photos taken over the last few years, a good proportion of which contain family members. I'd like to put together a photo book of one family member,...
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Multi word synonyms

I’m looking to write a semantic distance function for phrases (4 words or less) that can map multi-word synonyms together. Here are some examples: “Red shoes” would be close to “Orange sandals” “Blue ...
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Strange result for decision-tree-classifier. Why?

I'm still in touch with DT-Classification and try to understand how the Mathematica algorithms works and what tree is generated (related: click). I just tested the well-known "playing tennis" (...
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34 views

Output of the trained neural network for a set of inputs

Sorry if this was too trivial but I want to get the output of the neural network I trained for the specific inputs that I feed. The notation I often saw was of TrainedNet[inp] kind. But when I use ...
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34 views

Error Histogram of a Neural Network

Can you plot the error histogram of a trained network (with test, train and validation sets if possible but one would be enough)? Matlab Easily does that for you but I could not find a function that ...
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27 views

Properties of a decision tree generated by a classifier

A question regarding Classify using the method DecisionTree. From this post I learned how to access the structure of the ...
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21 views

Transfer learning with different input size

How to do transfer learning for the input of dimension (64x64x1)using Resnet-50, which has three-channel input (224x224x3)?
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1answer
48 views

Chaining NetGraphs

I have two NetGraphs, each with 3 different input ports ("Input","Random1","Random2"), the first with 2 outputs ("Output" and "Loss") and the second with one output "Final_Out". All I want to do is "...
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1answer
50 views

Using GPU Computation in LearnDistribution

LearnDistribution has an option for RealNVP, which is directly training a neural network for the distribution. It also has an option for TargetDevice, however, it appears to do nothing. Take the ...
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58 views

How to generate names with a GAN?

I'd like a tutorial for text generation using GANs, specifically for names. I have a list of company names and would like the network to generate novel ones. This is one of the only few examples of ...
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43 views

ClassifierFunction output dependent on current $ContextPath

I'm trying to use Classify to predict heads in a Mathematica expression from the heads of its arguments, which may be functions whose heads are not on the current <...
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115 views

Use FacialFeatures in Python Web API?

Under the hood, FacialFeatures uses the net-model ResNet-101 Trained on Augmented Casia WebFace Data. I would like to see a tutorial-style answer on how one would ...
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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 ...
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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 ...
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1answer
87 views

Error during training neural network: input is not an integer between 1 and 100 although it is

I imported my data from Matlab in matrix form and tried to use it in a neural network as given below but I get the error that says the input is not an integer between 1 and 100 although it is. <...
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211 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....
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46 views

LearnDistribution Vs FindDistribution?

How would you explain the difference between the new LearnDistribution function and the FindDistribution function? or perhaps the overall ML vs Find framework. I would think for a sample size of 1000 ...
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1answer
44 views

How can import more files simultaneously and clean them in Mathematica?

I would like to import three files in Mathematica (I am using the Import function[]) and try to clean them. I used ...
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82 views

Hessian of a loss function for a neural netwrok

Is a way to calculate the Hessian of the loss function in Mathematica. It's easy to define a loss function for neural nets but I couldn't figure out how to calculate the Hessian(more precisely I ...
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36 views

Loss function for an unsupervised neural network

I am trying to use a neural network approach to fit a model based on two sets of data: the "before" set and the "after" set. The "after" set is the subset of "before" examples that have survived to a ...
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36 views

Splitting large matrix in neural network

I'm trying to make a neural network that takes a 16x100x100 matrix and splits it into each 100x100 part, puts each through a dense layer, and then puts them them together once again to form a 16x10x10 ...
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2answers
102 views

Find Probability that Image Is Text

I can find out whether an image is text: ImageInstanceQ[img,Entity["Concept", "TextualMatter::m7642"]] And if an image is most likely text, I can find out the ...
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1answer
129 views

NetTrain Freezes Computer

I have a neural network I am trying to train: ...
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1answer
99 views

How to create model for classification using SVM methods?

I have a matrix for diseases associated to their symptoms, the columns represent symptoms each row is a disease. the labels 1 and 0 in the matrix data sets represent when a disease i related to ...
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134 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 ...
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193 views

Classifier training on a large data set

I am interested in binary classification and I have a huge set of training examples (around 4 millions). Each example is a $10 \times 2$ matrix. When I run the classification after two hour run the ...
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47 views

Concise way to set input directory

Got this Mathematica ResNet- 50 Code online and has been trying to make run it using the same data set but it seems my directories to the dataset were not correct, keep getting this error: ...
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1answer
64 views

Confusion about Predict Model NameAge

Predict["NameAge", "Claire"] 8 distribution = Predict["NameAge", "Claire", "Distribution"] dataRaw = distribution[[2]] <...
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89 views

Reverse Engineering of MMA `Classify[]` Output?

Update: as @AntonAntoniv rightly noticed in his comment the case of DecisionTree is already discussed. Now it would be great to also have an equivalent answer for LogisticRegression. MMA is really ...
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1answer
171 views

Two different results produced by Classify

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2answers
61 views

Setting the number of neighbors in NearestNeighbors algorithm

I am using Machine learning in Mathematica 11 for a specific set of data. When I use p=Predict[data] I get the output model by method of NearestNeighbors, which ...
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1answer
77 views

UtilityFunction for actual and predicted values (machine learning)

In machine learning, the utility function for a classifier assigns the utility value to an actual value v(act) and a predicted value v(pred), typically e.g. in form of ...
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41 views

How do I apply a NetChain element-wise during training?

I need to train a Neural network that models a function that takes a single real number, and outputs a real number. x -> y = f[x] However, in the training data, each data point doesn't link a single ...
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1answer
75 views

Reccurent neural network

I watched the this video on YouTube and copied the code. Why it does not work in M12? I mean net[inData] and ...
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22 views

Console Output to file corrupted

When i run WolframScript and write the output of a *.wls to a file and then modified the program slightly, i started getting these more exotic outputs. The function used is NetTrain. Does someone ...
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29 views

Unable to replicate Predict/NeuralNetwork example from Help Pages

I am trying to replicate an example right out of the help manual (ref/method/NeuralNetwork). This example compares the convolutional NN versus a fully-connected NN....
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270 views

Implementing Contextual Bandits

The multi-armed bandit problem (MAB) is a classic in Reinforcement learning. Now that Mathematica version 12 finally has support for Reinforcement learning: Here's a nice "mnist example" for training ...
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41 views

TextContent does not work on my computer

TextContents does not work, returns `TextContents::wlnetcorr2: A required WLNet file is corrupted and could not be loaded. `TextContents::nlpnetmodel: An internal error occurred while loading ...
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87 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 ...
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155 views

Bug in the classification optimization algorithm for large data sets

I believe that I encountered a bug in Mathematica 12. The Classify[] function throws errors when simultaneously: The training set has significantly above $10^5$ ...
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59 views

Predict the form of a function using machine learning

I have a function F[x_] := x^3/(e^x -1) I generate many data points i = 1,2,3,4, ... ...
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70 views

Can I extract symbolic expression of neural network loss function?

Once we create a neural network with NetChain in Mathematica, can we extract the loss function in the symbolic form for Mathematica to play with symbolic manipulations using Mathematica's built-in ...
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1answer
87 views

How do I create my own activation function in NetChain in Mathematica?

I want to have my own activation function, say a quadratic function, instead of Tanh, or Sigmoid etc. in Mathematica. How do I insert it in NetChain? e.g., how will the below code look for a new ...
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57 views

TargetDevice->“GPU” takes no effect in prediction of Classify and ClassifierMeasurements?

I can train the model with GPU via method->"NeuralNetwork" in Classify. I'm on Mathematica 12.0 and the problem also happens in 11.3. Is this a bug since 11.1 to 12.0? In training, GPU is faster ...
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49 views

Not able to use ImageIdentify

When I tried to use ImageIdentify (Trial version of Mathematica 12) on an image I clicked on my mobile I got this error message ImageIdentify::interr: An internal error occurred: An unexpected error ...
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86 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 ...
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1answer
171 views

Can I use machine learning to predict a functions behavior?

I want to use this as training data (1, sin(x)), (2, sin(2x)), (3, sin(3x)) and answer the question what is (20, ?). I ...
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1answer
82 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 <...
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1answer
127 views

Bug in EmbeddingLayer?

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