# Mahesh Taparia

### MathWorks

I am an Engineer in the Engineering Development Group at Mathworks, Hyderabad.

My area of interest are signal processing, machine learning, computer vision and deep learning.

DISCLAIMER: Any advice here are my own and no way reflect that of the Mathworks.

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**Content Feed**

Adapting 1D CNN

Hi Try to change the maxpooling operation,like make it with small window like [1 2] or you can remove max pooling operation as ...

alrededor de 2 meses ago | 0

| accepted

Error custom training loop: Value to differentiate must be a traced dlarray scalar.

Hi You are converting the dlarray data to double and then again converting to dlarray to perform automatic differentiation. T...

alrededor de 2 meses ago | 0

| accepted

plot and fit surface

Hi The syntax and code which you have used is correct. The above code will fit a 2nd degree polynomial to the given data points...

4 meses ago | 0

| accepted

Determine and plot the response of an accumulator for an input sequence 𝑥[𝑛] = 𝑢[𝑛] + 2𝑢[𝑛 − 1] − 3𝑢[𝑛 − 3]. Consider the system is at rest. use the function filter

Hi You can refer this example to plot the response using filter function.

4 meses ago | 0

How to plot frequency response at discrete time?

Hi You can use freqz function to plot frequency response at discrete time. You can refer this example to plot the response of y...

4 meses ago | 0

Check for incorrect argument data type or missing argument in call to function 'diff'.

Hi It seems you are finding derivative of a function of x. If you don't have the value of x, then you can go by symbolic approa...

4 meses ago | 0

How to develop a CNN classification with meta, train and test data

Hi You can use pretrained network already exist in DL toolbox and finetune the model on your data. You can refer this documenta...

4 meses ago | 0

Bandpass filter of set of Data

Hi You can use 'bandpass' function to apply a bandpass filter to your data. For more information you can refer its documentatio...

4 meses ago | 0

Apply to Softmax row

Hi It seems you want to perform the softmax function as per your data/feature dimension. In this case you can create a custom l...

4 meses ago | 1

| accepted

Classification Algorithm Enquiry.

Hi You can look at this documentation and also check this example of the documentation of multiclass SVM. Hope it will help!

4 meses ago | 0

| accepted

How to classify images depending on the shape of each image's object ?

Hi There is already an existing answer similar to this problem. You can refer this link for that.

5 meses ago | 1

Image segmentation for area

Hi You can 1st segment the plants from the image. To do this, green part is easily segmented by applying the suitable threshold...

5 meses ago | 0

Does black region of the rotated image affect the CNN classification accuracy?

Hi Yeah it will affect slightly. This is an augmentation technique, mostly it will improve the network accuracy. Yeah network...

5 meses ago | 2

| accepted

Cropping multiple Images and save them in a folder

Hi By looking at your code, it seems the variable 'images' is not defined. You are creating a 'theFiles' variable, which contai...

5 meses ago | 1

Specify Output Class For GAN Image Generator

Hi You can possibly try with conditional GAN to generate images of a particular class. For more information, you can refer thi...

5 meses ago | 0

| accepted

Express vector of linear combinations as matrix product

Hi You can use diff function to express the differentials. For example, in your case syms x(t) y(t) a=5; b=6; c=7; d=8; e...

5 meses ago | 0

How to detect 2D objects in LiDAR data

Hi You can follow this documentation of lidar labeler which explain the labeling process. For detection, you can use the pointP...

5 meses ago | 2

| accepted

I have a following code and would also like to store all outputs that relate to "m". I was able to store all outputs of "i" but I'm struggling with storing those of every "m" value. Please help

Hi You can store the information correspondig to each m value into a cell array. For example clc; clear; ValTraded = {}; ...

5 meses ago | 0

| accepted

How can I plot the Wavelet representation of a signal?

Hi You can refer this example of wavelet transform and spectrogram plot. Load the audio signal and follow this example. Hope it...

5 meses ago | 0

How do you do multi-class classification with a CNN network?

Hi As per your problem, I am assuming you are having multiple categorical objects in a single image. So the problem is no longe...

5 meses ago | 1

| accepted

Convolutional encoder decoder for image classification

Hi You can refer to the existing MATLAB examples of image classification. You can refer the below links for this: Link1 Link2...

5 meses ago | 0

Unrecognized function or variable 'functionhelperPlotScalogram3d'.

Hi The function helperPlotScalogram3d is a helper function shipped with Wavelet Transform example. You can find this function h...

5 meses ago | 0

Cellarray in a dlarray

Hi The dlarray is supported for full arrays of data type double, single, or logical, or for full gpuArrays. Use cell2mat functi...

5 meses ago | 0

Create model and estimate parameter

Hi It seems, theta is unknown here. You can vary theta and calculate F at different value of theta. For example, vary theta as ...

5 meses ago | 0

Using SVD for Dimensionality Reduction

Hi The first part is already answered here. For 2nd part, you can use the function pca to directly calculate the input with p...

6 meses ago | 1

implementation of mini-batch stochastic gradient descent

Hi You mentioned that you are implementing a classification network. In your code, you are using square of L2 norm to calculat...

6 meses ago | 0

Determining the number of principal components

Hi The function svd returns the singular values in descending order, so you can consider first N values. Regarding the conside...

6 meses ago | 0

I can't use the function minibatchqueue. Maybe I don't know where to find the supporting function 'createBatchData'

Hi The function createBatchData supporting function is present in the example of YOLO v3 object detctor. You can find it here. ...

6 meses ago | 0

| accepted

Why bit plane 8 of my image is almost black?

Hi It seems, the image which you are displaying might be in double or single format. Convert it to uint8 format using uint8 com...

6 meses ago | 0

Can you please help me.

Hi To define a function, you can refer this documentation on function creation. To add all the vector elements, you can refer t...

6 meses ago | 0

| accepted