Athul Prakash

MathWorks

Last seen: alrededor de 1 año ago | Active 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.

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Answered
How to plot confusion matrix for 2 classes (genuine or fraud)
Hi Tam, First, you may set aside some of your data as test data. With this test dataset, obtain Y_Actual as the labels and X...

alrededor de 1 año ago | 0

Answered
How do I create a simulator to scan a matrix and switch some of the elements in it?
Hi Eason, Using a filter along with conv2 should work, for example.. % It may be easier to store a logical array inp = (ra...

más de 1 año ago | 0

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Answered
Reducing script repetitiveness and length
Hi Daniel, Your code doesn't seem extra complicated. Writing each plot after each calculation is one way to keep things simple...

más de 1 año ago | 0

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.MAT FILES AND WRITING CODE TO ANALYSE THE .MAT FILES
Hi Caroline, You may consider using struct arrays to group your data, and save everything to one file as a simplification. % C...

más de 1 año ago | 0

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Answered
How to extract rows and columns of matrix that will not equal to 0.
Hey Teb. When programming in MATLAB, it is best to avoid for loops and vectorize the code as far as possible. If you have F=A...

más de 1 año ago | 0

Answered
How can I know if the repeated numbers of array A appear in B , and if so count their repetition (for A and B ) and divide their countings? A and B have different dimensions.
Hi Ana, You may extract the common elements of the array using intersect() function. common = intersect(mag_a, mag_b); Then...

más de 1 año ago | 0

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Answered
Householder Algorithm finding Q
Hi Frederick, You may prefer the MATLAB built-in qr() function. [Q,R] = qr(M); See this documentation: https://in.mathwo...

más de 1 año ago | 0

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BSXFUN Vectorizing. How can I vectorize the function?
Hi Iman, bsxfun intends to apply @plus to elements of same index across the two input arrays. So in your call to bsxfun, the di...

más de 1 año ago | 0

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How do I weight input data when training a neural network?
Hi Cai, I can think of a few ideas, you may need to experiment with these to find what works.. Once the network is trained ...

más de 1 año ago | 0

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Reading data from large .CSV files
Hi there, The use of a datastore is what comes to mind at first - you could try using read to obtain a chunk of data at once a...

más de 1 año ago | 0

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Answered
How To Find the Euler Angles(Roll,Pitch,Yaw) of a Plane in 3D?
Hi Ercan, You mentioned that you have a plane equation of the form and wish to calculate the Euler angles. I presume you are r...

más de 1 año ago | 1

Answered
Create the following Matrix typing one command
Hi Jens, In MATLAB for entering matrix values, commas and spaces can be used (interchangeably) to separate values left to right...

más de 1 año ago | 0

Answered
Please write the c-code below in matlab.
Hey Attcharapan, I presume that you're trying to do somethign similar to the Sieve of Erastosthenes alrogithm and find prime nu...

más de 1 año ago | 0

Answered
feature vector of NN
You can extract the network and inputs from the 'results' struct using.. net = results.net inputs = results.inputs I found ...

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Response must not contain any NaNs??
Hi Sho, NaN is a special floating-point value which is used as a placeholder in cases where a 'double' type number was expected...

más de 1 año ago | 1

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Answered
Importing EEG edf to matlab
Hi Mubeen, I presume you're using the pro_biosig.m file found here: https://github.com/donnchadh/biosig/blob/master/biosig/eegl...

más de 1 año ago | 0

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Terminating function call with CTRL-C but keep the main function working
Hi Adrian, I can't think of a straightforward solution, since MATLAB doesn't allow you to programmatically trigger a Ctrl+C ; n...

más de 1 año ago | 0

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How can i solve this? Subscripted assignment dimension mismatch
The error message indicates that you may be assigning an array of values but the sizes of the arrays on the left and right of '=...

más de 1 año ago | 0

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Answered
Plot Results of objective function in fmincon
Hi Amanuel, @optimplotfval is designed to plot the output of the Objective Function against the number of iterations. In you...

más de 1 año ago | 2

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How to use IF with @(block_struct) function
Hi Saud, Since blockproc uses anonymous functions, you may save your multi-line function into a script, say myFunc.m and then p...

más de 1 año ago | 0

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Answered
How do I find the given eigenvectors
I presume that you've obtained these eigenvalues by calling the 'eig' function in MATLAB. You may try calling the same with a se...

más de 1 año ago | 0

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Row index exceeds table dimensions.
If you could attach the input file, others users may actually run the code with that data and witness the exact error themselves...

más de 1 año ago | 0

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Looping vector values into functions
Saving multiple variables with names 'n1', 'n2', etc may be a bad practice, I would recommend using a vector 'n' with indices 1-...

más de 1 año ago | 0

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Help with simple ANN for data prediction
If you're looking to pick up how Neural Networks are handled in Matlab, I would suggest going through some of the examples in th...

más de 1 año ago | 0

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Array not positive real value?
As others have pointed out, this error message typically occurs when you're indexing an array with incompatible values (usually ...

más de 1 año ago | 0

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How to add a column in MATLAB after sorting an array
Hi Sukalyan, Looking at your figure, I assume that the data is a table existing in the workspace and that you've already sorted...

más de 1 año ago | 0

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Combinations of values in vectors
Hi Davide, To answer both your questions.. a) I'm assuming that you don't want to specify 'lam' in the code (along with the i...

más de 1 año ago | 0

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Include several folders into path using Matlab Engine for Python
Hi Davide, If you're in MATLAB at the command line, you may use genpath and addpath as follows to add a folder 'myOuterFolder'...

más de 1 año ago | 1

Solved

Find relatively common elements in matrix rows
You want to find all elements that exist in greater than 50% of the rows in the matrix. For example, given A = 1 2 3 5 ...

más de 1 año ago

Solved

QWERTY coordinates
Given a lowercase letter or a digit as input, return the row where that letter appears on a <http://en.wikipedia.org/wiki/Keyboa...

más de 1 año ago

Athul Prakash

MathWorks

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