Pratyush Roy
Last seen: en dag ago
MathWorks
94 total contributions since 2020I 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
Answer 10 questions that were unanswered for more than 30 days
Awarded to Pratyush Roy on 30 Mar 2021
20 of your answers have been accepted
Awarded to Pratyush Roy on 15 Feb 2021
Contribute at least one answer each month for 6 consecutive months
Awarded to Pratyush Roy on 02 Feb 2021
Provide your first answer ever to someone else's question
Awarded to Pratyush Roy on 31 Aug 2020
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...
14 dagar ago | 0
| accepted
Problems with implementation of houghlines
Hi, The lines generated by the houghlines method has several properties.Here point1 and point2 represent the coordinates of the...
22 dagar ago | 0
How to reliable find the distance between matrices?
Hi, The function pdist2 might be used to find distances between matrices. Hope this helps!
22 dagar ago | 0
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...
23 dagar ago | 0
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!
23 dagar ago | 0
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 ...
23 dagar ago | 0
| accepted
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...
24 dagar ago | 0
| accepted
Use of Image Labeler
Hi Richa, The answer here tries to answer a similar question on the function 'appendImage'. Hope this helps!
24 dagar ago | 0
3D point cloud fusion
Hi Chandan, You can refer to the pcmerge documentation for further help. Hope this helps!
25 dagar ago | 0
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...
25 dagar ago | 0
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!
25 dagar ago | 0
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...
ungefär en månad ago | 0
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...
ungefär 2 månader ago | 0
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...
2 månader ago | 0
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...
2 månader ago | 0
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...
2 månader ago | 0
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...
2 månader ago | 0
Understanding accuracyValidation Output of Classifier
Hi Josh, The output acc is obtained by running the function predictFcn on the tree model. [CoarseTreeY,acc] = trainedCoarseT...
2 månader ago | 0
fast wavelet Transformation by using lowpass and highpass
Hi Jana, The highpass and lowpass functions can be used to perform one dimensional filtering. Let us consider the following s...
2 månader ago | 0
Matlab OnRamp hangs on project tasks
Hi Laura, The link here might be helpful. Hope this helps!
2 månader ago | 0
How to plot for physical bodys and streamlines?
Hi David, As rightly pointed out, the plot only displays a point since u and v values are not arrays but single points. To obt...
2 månader ago | 0
How to get average power from simulink scope
Hi Yousef, Firstly the data can be exported to workspace as an array of shape (N,2). Here N represents the number of time insta...
2 månader ago | 1
| accepted
Customizing fitness function of genetic algorithm
Hi, The link here might be helpful! Hope this helps!
2 månader ago | 0
| accepted
Why the ‘CategoricalPredictors’ properties are always empty after running fitrensemble()?
Hi Haris, You might consider the following workarounds for your problem: Answer to Question 1: The "CutPredictorIndex" index p...
2 månader ago | 0
How to Create NcNr*NcNt Block Circulant matrix
Hi Ayaz, The link here might be helpful. Hope this helps! Regards, Pratyush
2 månader ago | 1
Applying an integer to a specific cell of a matrix
Hi Noah, The following code might be helpful : x = 0:0.1:3; y = -2:0.13:2; Load = 10;%Integer that we want the elements to r...
2 månader ago | 0
How to forecast time series data using Kalman filtering technique on matlab?
Hi Ashok, The link here mght be helpful. You can also go through the documentation for Kalman Filter. Link is given below: ...
2 månader ago | 0
matchFeatures for multiple images
Hi Maria, The matchFeatures currently supports matching features between two images at a time. As a workaround, you can refer ...
2 månader ago | 0
poctave function is providing an unexpected center frequency value and resulting amplitude
Hi Matthew, I have brought this issue to the notice of our developers. They will investigate the matter further. Regards, Pra...
2 månader ago | 0
How can I obtain the coordinates(x, y, z) from a 3D isosurface plot?
Hi, The following link might be helpful: https://www.mathworks.com/matlabcentral/answers/249747-how-can-i-extract-xyz-data-fro...
3 månader ago | 0
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