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Pratyush Roy


Last seen: 1 día ago

MathWorks

106 total contributions since 2020

I am an Application Support Engineer at MathWorks.
My responsibility is to provide the best support for an application like ML,Image Processing, Signal Processing.
Disclaimer: Any articles/idea/opinions here are my own and in no way reflect that of MathWorks.

Pratyush Roy's Badges

  • Revival Level 3
  • Knowledgeable Level 3
  • 6 Month Streak
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Answered
Signal Labeller App / Machine Learning data format
Hi, The getLabeledSignal function can convert a labelled signal set to a table. You can go through the documentation page for m...

7 días ago | 0

Answered
optimization by minimizing the MAD
Hi, The link here might be helpful. Hope this helps!

9 días ago | 0

Answered
How to extract nodal coordinates in pdetool?
Hi, You can refer to the following link: https://www.mathworks.com/help/pde/ug/pde.femesh-properties.html The Nodes property ...

9 días ago | 0

Answered
Maximum number of labels in VolumeSegmenter
Hi, Unfortunately the maximum number of labels that is supported in the volume visualization with labeled data is 128 due to ...

9 días ago | 0

Answered
How do I create function that is defined by itself?
Hi, As per the equations mentioned above, the function is a periodic one with a period of 4. You can refer to code snippet belo...

9 días ago | 0

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what is the difference between using SVM classifier and normal CNN for image classification?
Hi, In the first case we are using the Alexnet layers as a feature extractor, i.e., to transform the image to its representativ...

9 días ago | 0

| accepted

Answered
Error using internal.stats.pdist2mex
Hi, This issue could be due to RAM limitations. You can try the following workarounds: 1. Go to MATLAB > Preferences > Works...

9 días ago | 0

Answered
Connectivity between pair of Simulink blocks
Hi, There is no direct way to obtain whether any two blocks are conencted or not in Simulink. As a workaround, you can consider...

9 días ago | 0

Answered
applying Ideal low-pass with Gaussian noise image
Hi, You can use the mat2gray function to map the output image values between 0 and 1, where 0 represents black, 1 represents wh...

10 días ago | 0

Answered
How can i sample the function y(t) = sin(200πt) --> y[n] = sin(200πn)
Hi, The following code snippet might be helpful for generating discrete sequences under different sampling frequencies: fs = 4...

10 días ago | 0

Answered
Travelling Salesman Problem Implementation
Hi, The link here might be helpful to run TSP on the given data. Hope this helps!

10 días ago | 0

Answered
Autocorelation of only the colums in the matrix
Hi, As per my understanding, you are trying to find the autocorrelation sequence of the columns of the matrix. The xcorr functi...

10 días ago | 0

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Need Predictor Importance in Random Forest Expressed as a Percentage
Hi, oobPermutedPredictorImportance normalizes the predictor importance by the standard error (this is common practice in the fi...

27 días ago | 0

| accepted

Answered
Problems with syntax and implementation of houghlines
Hi, The lines generated by the houghlines method has several properties.Here point1 and point2 represent the coordinates of the...

alrededor de 1 mes ago | 0

Answered
How to reliable find the distance between matrices?
Hi, The function pdist2 might be used to find distances between matrices. Hope this helps!

alrededor de 1 mes ago | 0

Answered
Golden section search algorithm
Hi, fplot prefers to pass a vector to the function for efficiency, but checks whether that works and gives a warning if it does...

alrededor de 1 mes ago | 0

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How to plot GA best value over Generations?
Hi Felix, You can refer to this answer which tries to address a similar problem. Hope this helps!

alrededor de 1 mes ago | 0

Answered
How do you test ANOVA normality assumption?
Hi Emanuele, You can use the normplot function to obtain the normality plot of the residuals. This documentation page contains ...

alrededor de 1 mes ago | 0

| accepted

Answered
Jacobian calculation of symbolic variables which are function of time.
Hi Sourabh, In this case the1 and the3 are symbolic functions rather than symbolic variables. There is no direct way to calcula...

alrededor de 1 mes ago | 0

| accepted

Answered
Use of Image Labeler
Hi Richa, The answer here tries to answer a similar question on the function 'appendImage'. Hope this helps!

alrededor de 1 mes ago | 0

Answered
3D point cloud fusion
Hi Chandan, You can refer to the pcmerge documentation for further help. Hope this helps!

alrededor de 1 mes ago | 0

Answered
RBF ,LVQ in NN
Hi Yogini, A RBF neural network consists of a radial basis layer followed by a linear layer. You can assign the "radbas" transf...

alrededor de 1 mes ago | 0

Answered
How to generate Adjacency matrix of a Simulink Model?
Hi, The answer here tries to address a similar problem on adjacency matrix. Hope this helps!

alrededor de 1 mes ago | 0

Answered
Error when trying to use [I,m]=quad(fun, a, b, tol)
Hi, If x is a symbolic variable, then the function g becomes a symbolic expression. In such cases, you should consider converti...

alrededor de 2 meses ago | 0

Answered
Get Posterior Probability for multi-class Linear SVM function from Classification Learner
Hi, The multi-class SVM in Classification Learner uses the fitecoc method to fit multiple binary SVMs to solve a multiple class...

2 meses ago | 0

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3D Cross Correlation
Hi Wayne, Since cross-correlation between two arrays can be assumed to be convolution between the first array and the flipped v...

3 meses ago | 0

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Exporting the 'statistical data' from Wavelet Toolbox
Hi, The feature for exporting statistics is currently not supported. As a workaround, the statistical functions can be applie...

3 meses ago | 0

Answered
Does varm use the current or lagged X
Hi Martijn, For an autoregressive model, the current output is dependent on past outputs and the present input. For the given e...

3 meses ago | 0

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How to use GA (Genetic Algorithm) without explicit objective function and with data-set?
Hi, Genetic algorithm will not work without an optimization function. To understand how GA works, refer to this link. Hope thi...

3 meses ago | 0

Answered
Understanding accuracyValidation Output of Classifier
Hi Josh, The output acc is obtained by running the function predictFcn on the tree model. [CoarseTreeY,acc] = trainedCoarseT...

3 meses ago | 0

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