Community Profile

# Athul Prakash

### MathWorks

50 total contributions since 2019

I am an Associate Application Support Engineer at MathWorks.

My areas of interest are Deep Learning and Computer Vision.

DISCLAIMER: The advice and opinions here are my own and not in any way that of MathWorks.

View details...

Contributions in
View by

Finding adjacent pixels of a certain color around a blue pixel in an image
Hi Michael, Here's one way to do it:- Create 2 masks, one identifying all blue pixels and another identifying all pixels adja...

3 days ago | 0

Dice roll sum and its corresponding probabilities
Have a look at the following post regarding Homework Questions on this forum: https://in.mathworks.com/matlabcentral/answers/86...

3 days ago | 0

Sum specific values from a matrix
You may use logical indexing as follows: cond1 = K(:,2)>=5 & K(:,2)<9; %these are logical indices to select out your given rang...

5 days ago | 0

resizing an array in MATLAB
I think what you're looking for is a way to index. I'm sure you'll find the answer here: https://in.mathworks.com/help/matlab/l...

5 days ago | 0

How to plot a line with repeated values of x?
Looks like you want the plots to appear side-by-side. Maybe you can concatenate 'PC1', 'PC2' and 'PC3' into one longer vector,...

5 days ago | 0

How expanding 2 columns matrix (with each row having edges of a specific range) into a vector without for loop?
Hey, Here's something I came up with, you may try it out to determine if it works with your data. It's not very straightfor...

1 month ago | 1

| accepted

How to programmatically adjust the font size of the editor and command window?
Hi Michele, You may use MATLAB's settings object to set and modify MATLAB preferences on the fly. Have a look at the doc linke...

1 month ago | 0

| accepted

Solutions of genetic algorithm and globalsearch versus fmincon
Hi Rui, I assume that after ga/globalsearch have terminated with a solution, you are calling fmincon with the 'hessian' ou...

1 month ago | 0

Is it possible to split the Command Window into continuous sub Command Windows?
One can split the editor window, but MATLAB doesn't support splitting the command window the way you described, at the moment.

1 month ago | 0

| accepted

How to convert objection function into maths?
You may run the optimization by calling 'bayesopt' function on 'minfn'. See the doc linked below for more details, the examples ...

1 month ago | 0

Converting .CSV file element to double
You may try setting options for the readtable function as outlined in this doc: https://in.mathworks.com/help/matlab/ref/readta...

1 month ago | 0

| accepted

How I can use the matlab coder to convert my matlab code to C language? what is the MEX function can any body explain for me.
MEX files are like an interface between matlab and code written in C/C++ or FORTRAN. You can use the 'mex' command to compile so...

1 month ago | 0

Fuzzy Logic cannot delete input and output variables in Matlab 2018b
Yes, this appears to be a bug. The developers were already notified of this issue and it was fixed in R2019a.

1 month ago | 0

Calculate mean of an array in time windows.
I'm not sure how you have arranged your data within the matrix 'EEG' - which dimensions correspond to which attributes? I not...

1 month ago | 0

How to perform Indexing
Hi Larissa, The goal of this forum is to help solve generic MATLAB questions, not to provide full solutions to anybody's homew...

1 month ago | 0

How to write 2 functions both in 2 variables that will be the objective functions of a Multi-objective Genetic Algorithm?
Hi Andrea, I think your approach with the 'multiobjective' function is wrong. The input 'FitnessFunction' should be returnin...

2 months ago | 1

Finding Shortest Path Without Crossing Restricted Areas
I suggest implementing the Dijkstra's algorithm for this problem. An explanation is found here: https://en.wikipedia.org/wiki/Di...

2 months ago | 0

Matrix multiplication between 2d matrix and slice of 3d array
Hey Morten, You can check out 'MULTIPROD' - from File Exchange (linked below). It covers your requirements exactly, https://i...

2 months ago | 1

| accepted

"NumBins" error when using fitcsvm, setting at least one hyperparameter to optimize, and specifying Nu
Looks like there is a bug here. I have brought this issue to the notice of our developers. They will investigate the matter furt...

3 months ago | 1

| accepted

How to get the gradient with respect to the output of a specific layer in a deep learning model?
You could try looking at the source code for the fullyConnectedLayer that you're using; and then customizing that code to return...

3 months ago | 0

Change the name of a table located in my workspace inside a for loop
Dynamically changing variable names is not advised, I think you should try storing the data in multiple different tables.

3 months ago | 0

How do I create a vector from a for loop with different intervals?
Hey Josefine, Everytime MATLAB executs the line p1(i) = p1(i) It prints the result, which in this case is the entire vector...

3 months ago | 0

Swapping any pair of elements
Try this: (I used logical indexing to copy from a base matrix to resultant matrix. Got the answer by caculating the right indic...

4 months ago | 0

Is Mask R-CNN available in Matlab?
Matlab doesn't have a pre-trained Mask RCNN network as of now. You may write your own training script for the custom network ...

4 months ago | 0

| accepted

Precision/Recall (perfcurve)
perfcurve() is meant for computing performance curves for your model - such as PR curves or ROC curves. In the literature, you m...

4 months ago | 0

| accepted

combinations with 2 columns
Hi Sampath, Look like you want to select exactly 1 element per row, from among all columns of the matrix. Hence, if there are ...

4 months ago | 0

integrate a matrix which is a function of two variables
Not sure what you meant by integrate... But I think you might be looking for something like cumsum, have a look at this: http...

5 months ago | 0

How to modify a sphereModel
Hi Alonso, There's usually a reason for attributes to be set as 'Read Only' for a specific class. If you actually changed those...

5 months ago | 0