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.
534
questions
2
votes
0answers
79 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:
...
2
votes
1answer
71 views
Confusion about Predict Model NameAge
Predict["NameAge", "Claire"]
8
distribution = Predict["NameAge", "Claire", "Distribution"]
dataRaw = distribution[[2]]
<...
5
votes
0answers
113 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 ...
4
votes
1answer
197 views
2
votes
2answers
92 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 ...
2
votes
1answer
174 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
...
1
vote
1answer
65 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 ...
3
votes
1answer
113 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 ...
0
votes
0answers
56 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....
20
votes
0answers
476 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 ...
0
votes
0answers
76 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 a ...
6
votes
0answers
120 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 ...
3
votes
0answers
177 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 $10^5$ ...
0
votes
0answers
76 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, ...
...
5
votes
0answers
96 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 ...
3
votes
1answer
205 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 ...
1
vote
0answers
84 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 ...
5
votes
0answers
128 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 ...
2
votes
1answer
228 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 ...
6
votes
1answer
128 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 <...
6
votes
1answer
166 views
6
votes
1answer
231 views
0
votes
2answers
165 views
How to Sample from a Probability Density Function
I've done a pretty good job working my way through and understanding the various ways to calculate the differences between probability distributions through Kullback Leibler Divergence and was happy ...
1
vote
1answer
71 views
What is the meaning of “Number of features” returned by ClassifierInformation?
I have set of 13 dimensional vectors split into three classes, and I'm building a classifier using supervised learning.
After running c = Classify[..] on ...
3
votes
0answers
197 views
Physics based predictive model using Predict
Summary:
The first order response of a block of metal quenching in a fluid (or a cold block heating in a warm environment) is well known. I am trying to create a physics based predictive model for ...
4
votes
0answers
225 views
Visualizing and Understanding CNN with Mathematica
The famous 2013 paper from Zeiler and Fergus "Visualizing and Understanding Convolutional Networks" proposes a method to understand the behavior of CNN using one (or more) DeConv networks coupled with ...
52
votes
5answers
8k views
Mathematica command that allows it to read my intentions
In version 2.0 of Mathematica there was a command, ReadProgrammerIntentions[ ] which allowed it rapidly compose code that could solve problems simple to complex, ...
4
votes
1answer
142 views
Pulling the principal components out of a DimensionReducerFunction?
Suppose I perform dimension reduction using PCA:
...
0
votes
0answers
34 views
Can I use inbuilt machine learning to guess the n-th term of the inverse series?
Consider this concrete example.
InverseSeries[ Series[ PolyLog[s, z], {z, 0, 10}]]
From this output is there a way of writing down a formula for the n-th term? ...
3
votes
2answers
154 views
How to make Hinton diagrams
I just start studying machine learning with Mathematica and, I want to know how make Hinton diagrams. Can someone give an idea, please?
1
vote
1answer
122 views
One-hot encode from Integer Encoding
I have several data sets that I am working with in Mathematica. There are several columns of data but I am going through it one column at a time. Now I have some columns where respondents were able to ...
8
votes
0answers
547 views
How to train a bounding box detection model?
Apparently, this still isn't possible in v12?
I'd like to add a new class to one of the standard object detection architectures. Consider the YOLO v2 detector from the Neural Net Repo.
...
1
vote
0answers
86 views
Cluster analysis with constraints on number of clusters and their abundance
How to perform cluster analysis in a set:
With the number of clusters bounded but not specified, e.g. $k\in[3,5]$
With a bounded abundance of clusters (the number of elements in each of the clusters),...
2
votes
1answer
67 views
Oversampling of data set for class balancing
We have a set of $n$ three-dimensional vectors:
{{x_1, y_1, z_1}, {x_2, y_2, z_2}, {x_3, y_3, z_3}, ..., {x_n, y_n, z_n}}
They represent the results of $n$ ...
1
vote
2answers
55 views
Extracting numerical value from sentiment classifier
I have this code, and want to extract out just the number. I tried QuantityMagnitude and a transformation rule.
...
4
votes
1answer
210 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 ...
0
votes
1answer
326 views
NetGraph/Model for BERT?
Does anyone know of a way to get the BERT model working for word embeddings in Mathematica? Doesn’t seem to be available on GitHub or the Wolfram Net Repo...
1
vote
1answer
79 views
Error NetTrain::invencin: Invalid input when training a neural network [closed]
I've build a Deep neural network with various variables:
...
9
votes
1answer
690 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}
...
4
votes
0answers
77 views
How to implement external memory for the “memory augmented neural network”?
I am trying to implement the memory-augmented neural network using MMA 11.3.
The memory-augmented neural network in based on the paper here. There are implementations using ...
1
vote
0answers
94 views
ImageRestyle yielding low-level errors even in example cases
the title covers it. I'm on v11.3.0.0 on a MacBook Pro running Mojave 10.14.2, and trying to run ImageRestyle seems to immediately throw a bunch of errors that aren't related to the input in an ...
1
vote
1answer
144 views
How to get function of “GaussianProcess” prediction?
I am a new user of Wolfram Mathematica. I need your help.
Let's say I have three variables: x, y, z. I want to calculate the "z" depending on x, and y. In other words, I want to find a function for z ...
1
vote
0answers
62 views
Loading machine learning library without enabling my discrete Nvidia GPU? [closed]
I've asked a similar question
[here].
I cannot use some of the machine learning modules without enabling my discrete Nvidia GPU.
My setup:
Ubuntu 16.04 on a Dell XPS-15 9560 Intel i7 CPU with 8-...
2
votes
0answers
109 views
The hyper-parameters tuning
I am looking for an automatic tool to hyperparameter tuning. Something similar to Random Search Cross Validation in Scikit-Learn.
Note: I used ValidationSet options,...
1
vote
0answers
74 views
“Learning” to parameterize Hermitian matrices with a basis using neural networks
I'm interested in using neural networks to "learn" how to write down Hermitian matrices, specifically those which are defined over spaces with a specific tensor product structure. The simplest example ...
8
votes
0answers
128 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.
...
1
vote
0answers
54 views
Confusing errors using predict to map between matrices
I'm messing around with the new features involving machine learning in Mathematica 11, and one easy thing to try is to make a machine learn the matrix exponential function. The first silly idea I had ...
0
votes
1answer
74 views
Which built-in DistanceFunction options does Mathematica offer? [closed]
The documentation is not specific at all about which built-in distance functions are implemented in Mathematica:
https://reference.wolfram.com/language/ref/DistanceFunction.html
For instance, I ...
3
votes
2answers
646 views
3
votes
3answers
224 views
How can I test my machine learning model on a machine with no Mathematica?
I need to test my machine learning models that I’ve built using Predict on 100,000 observations. The problem is that the machine where the testing is done doesn’t ...
