Questions tagged [matlab]

MATLAB is a high-level language and interactive programming environment for numerical computation and visualization developed by MathWorks. Don’t use both the [matlab] and [octave] tags, unless the question is explicitly about the similarities or differences between the two. When using this tag, please mention the MATLAB release you're working with (e.g. R2017a).

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How to quantify the performance of the classifier (multi-class SVM) using the test data?

I am working on a traffic sign recognition code in MATLAB using Belgian Traffic Sign Dataset. The dataset consists of training data and test data. I resized the given images and extracted HOG ...
4
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1answer
594 views

Issue with backpropagation using a 2 layer network and softmax

I have a simple neural network with one hidden layer and softmax as the activation function for the output layer. The hidden layer uses various activation functions since I am testing and implementing ...
4
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1answer
419 views

Training a classifier when some of the features are unknown

I am training a classifier in Matlab with a dataset that I created. Unfortunately some of the features in the dataset were not recorded. I currently have the unknown features set as -99999. So, for ...
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1answer
723 views

How to find the various matrix sizes in designing a CNN

I am trying to understand CNN especially the maths and working mechanism using Matlab as the coding language. I have few confusion regarding the concept and the associated programming and will be ...
2
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2answers
142 views

Different runs of feature selection algorithm giving different set of selected feature. How to choose the best set among them?

I am using the forward feature selection algorithm from MATLAB. The code is as follows: ...
2
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1answer
183 views

Feature selection where adding features are deteriorating model

k I am training a kNN classifier with 144 features and graphed the accuracy vs number of features used and got this. What might be the reason for the drops in the accuracy at some points of the graph?...
2
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1answer
5k views

K-Fold Cross validation confusion?

I am using K-Fold cross validation to test my trained model, but was amazed that for every K-fold the accuracy is different. For instance, if I use 5 K-fold, every fold has a different accuracy. So, ...
2
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2answers
439 views

Convolution Neural Networks on microcontrollers

I am wondering if an already trained convolutional neural network can be represented as a formula just like a perceptron can ($x_1w_1 + x_2w_2 + \ldots =$ PREDICTION). I know that the formula could be ...