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Contribute at least one answer each month for 12 consecutive months
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Content Feed
What do the "scores" mean that result from application of a model from the Classification Learner App to new data?
I'll assume you are following the workflow here: https://www.mathworks.com/help/stats/export-classification-model-for-use-with-n...
1 day ago | 0
Need help designing an App for my trained neural network
I recommend App Building Onramp | Self-Paced Online Courses - MATLAB & Simulink (mathworks.com). I also recommend these two an...
5 days ago | 0
need help developing an app to use a trained regression model
It looks like the input feature data (variable "t") is not being constructed correctly. Was the neural network trained on a ta...
5 days ago | 0
Regrssion Learner App 2021a not working - start session grayed out
See https://www.mathworks.com/support/bugreports/details/2451532 This was fixed in R2021a update 2.
6 days ago | 0
Classifier learner app is not working in MATLAB 2021a?
See https://www.mathworks.com/support/bugreports/details/2451532 This was fixed in R2021a update 2.
6 days ago | 0
How to improve prediction accuracy of ANN?
Some thoughts: (1) The data set is very small ("close to 40 rows of data"). With such a small training set, try some small neur...
8 days ago | 0
How to generate code of Machine Learning functions for real-time application?
See https://www.mathworks.com/help/stats/code-generation.html Native Simulink blocks for model prediction have been develope...
8 days ago | 0
Find original data point from classification learner scatter plot
In the R2023b release of Classification Learner, the row of the dataset can be determined from one of the "Select Query Point" s...
12 days ago | 0
| accepted
How to draw an SVM regression plot
The doc page https://www.mathworks.com/help/stats/support-vector-machines-for-binary-classification.html has several examples ...
21 days ago | 0
MFCC code
https://www.mathworks.com/help/audio/ref/mfcc.html introduced in 2018a
23 days ago | 0
Related to MFCCs - Getting better results by choosing wrong sampling rate.
What is the task? What type of classification is being done? Are you performing training and testing of your model, or just test...
23 days ago | 0
Error using classreg.learning.Linear.prepareDataCR X and Y do not have the same number of observations.
The error message "X and Y do not have the same number of observations" indicates that, on line 39, which is mdl = fitrlinear(...
1 month ago | 0
ROC curve for Multicalss classification??
See https://www.mathworks.com/help/stats/performance-curves.html and https://www.mathworks.com/help/stats/rocmetrics.html Some...
1 month ago | 0
Precision-Recall curve for Multiclass classification
Given a multiclass classification problem, you can create a Precision-Recall curve for each class by considering the one-vs-all ...
1 month ago | 0
How to apply Explainable AI on user defined classification models (without using inbuilt classifiers)?
You can use the MATLAB explainable AI functions shapley, lime, and partialDependence while specifying the model using a function...
1 month ago | 0
hyperparameter tuning with fitclinear
The short answer is yes. That is, the code you shared is doing "nested cross-validation" because the hyperparameter optimization...
1 month ago | 0
hello all, i am a begginer in matlab , pls help me to do multilabel classification or multiclass svm ?
For binary SVM classification, use fitcsvm https://www.mathworks.com/help/stats/fitcsvm.html . If you have more than 2 classes,...
1 month ago | 0
LibSVM High-Dimension Training Matrix
You indicate that you have a 7-class multiclass classification problem, and you want to use SVM classifiers, so use https://www....
1 month ago | 0
Does Matlab provide online linear fitting?
There are many ways to perform linear fitting in MATLAB. This page lists some of the methods: https://www.mathworks.com/help/mat...
1 month ago | 0
bayes classifier
See the description and examples at these MATLAB doc pages: https://www.mathworks.com/help/stats/fitcnb.html, "Train multiclass...
1 month ago | 0
Can we consider regression tree (fine/ medium/coarse) present in regression learner app as classification and regression tree (CART)?
The short answer is yes. Quoting from https://www.mathworks.com/help/stats/choose-regression-model-options.html, "The Regressi...
2 months ago | 0
| accepted
I need MATLAB code to export FDR, PPV numbers.
See number (2) at the answer at https://www.mathworks.com/matlabcentral/answers/321904-how-to-export-performance-measures-from-t...
2 months ago | 0
How to export performance measures from the Classificaiton Learner App?
(1) Starting in 2022b, you can export results from Classification Learner using the Results Table. This will provide accuracy, m...
2 months ago | 0
How can I increase classifier accuracy?
Voice disorder classification is an active area of research. There are many papers on the topic. The paper "Voice disorder clas...
4 months ago | 0
How do i use my optimized gpr model and neural network to make predictions in app designer using user input data
These two answers explain how to make predictions in app designer with models trained in regression learner or classification le...
4 months ago | 0
Need help to find shapley value
The shapley command (https://www.mathworks.com/help/stats/shapley.html) was released in R2021a. The sidebar indicates you were u...
5 months ago | 0
How to create a frequency distribution table
From the raw data, you can use histcounts2 (https://www.mathworks.com/help/matlab/ref/histcounts2.html) to get the number of dat...
5 months ago | 0
How to calculate Shapley values of the constructed classification model from the whole dataset, not a query point ?
The short answer is to loop over the query points, then take the mean(abs(shapley_value)) along the appropriate dimension. You ...
6 months ago | 0
Inherit or Copy ClassificationLinear
When you do not have a classification model or regression model that is accepted by the shapley command, you can calculate Shapl...
6 months ago | 0
How to use Shapley function for an already fitted regression model?
You can calculate Shapley values for an arbitrary model by specifying the model prediction function with a function handle, and ...
6 months ago | 1
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