# Prateek Rai

### MathWorks

I am a Associate Application Support Engineer at MathWorks. My major responsibilities are Image Processing, Lidar Processing and Deep Learning at MathWorks

DISCLAIMER: Any advice or opinions here are my own, and in no way reflect that of MathWorks.

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**Content Feed**

converting classification network to fully convolutional with arbitrary sized image

Hi, One possible workaround could be that you can first use the whole image and find the potential patches of size 32x32x3 wher...

7 days ago | 0

hi there can anyone help me, i have problem in reading the excel file using the csvread command

Hi, Using "csvread" to read comma-separated value (CSV) file is not recommended.Use "readmatrix" instead. You can refer to rea...

9 days ago | 0

question about R-CNN stop sign detection

Hi, (1) First part So we first loaded the ground truth and displayed the summary using: % Load the ground truth data data =...

9 days ago | 1

| accepted

CNN, resnet50 - plot accuracy

Hi, There are 2 facts about the code which is important to note: (1) Since, your dataset is big that is why it is taking more ...

11 days ago | 0

| accepted

how to make pictures in subplot to same size?

Hi, You can refer to the following MATLAB Answer post on "How to plot all images to same size in subplot" to get more idea.

12 days ago | 0

plot in same graph from a loop

Hi, You can try "hold on" to retain current plot when adding new plot. Refer to hold MathWorks documentation page to learn mor...

12 days ago | 0

How to plot the complete data in a structure

Hi, You can try "hold on" to retain current plot when adding new plot. The code will look like: figure for m = 1 : 9 ho...

12 days ago | 0

| accepted

Double loop sort and group results in one matrix

Hi, A possible workaround to solve the problem could be: Z = zeros(100,100); L = length(X); for i=1:L for j=1:L ...

12 days ago | 0

Was doing some MATLAB homework and couldn't get a graph to come up just a table was looking for some help.

Hi, You can use the "figure" function before "plot" to create a figure window for your graph. Your code will look like: figu...

12 days ago | 0

Neural Network: Which patterns of the TrainSet does my network ACTUALLY train with?

Hi, First of all, 1000 epochs do not mean that only 1000 patterns are used to update the weights. 1 epoch completes when all ...

27 days ago | 0

How to set up a repeating series of terms

To my understanding, you want to set up a repeating series of terms so that, Xt = [ones(t-h+1,1), Lt*yt, Lt^2*yt, ... Lt^...

27 days ago | 0

Classification neural network - single image or datastore

To my understanding, you are using two methods that ideally should yield the same result but on implementation getting different...

27 days ago | 0

why I get error in scalar portion?

Hi, You should first check for the scalar portion and then for other conditions. Additionaly, you should also check for: if n...

27 days ago | 0

Solved

Magic is simple (for beginners)

Determine for a magic square of order n, the magic sum m. For example m=15 for a magic square of order 3.

2 months ago

Solved

Roll the Dice!

*Description* Return two random integers between 1 and 6, inclusive, to simulate rolling 2 dice. *Example* [x1,x2] =...

2 months ago

Solved

Make a random, non-repeating vector.

This is a basic MATLAB operation. It is for instructional purposes. --- If you want to get a random permutation of integer...

2 months ago

Solved

Sum all integers from 1 to 2^n

Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

2 months ago

Solved

Number of 1s in a binary string

Find the number of 1s in the given binary string. Example. If the input string is '1100101', the output is 4. If the input stri...

2 months ago

Solved

Return the first and last characters of a character array

Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...

2 months ago

Solved

Getting the indices from a vector

This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to <http://www.mathworks....

2 months ago

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Check if number exists in vector

Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

2 months ago

Solved

Swap the input arguments

Write a two-input, two-output function that swaps its two input arguments. For example: [q,r] = swap(5,10) returns q = ...

2 months ago

Solved

Column Removal

Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; ...

2 months ago

Solved

Length of the hypotenuse

Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<https://i.imgu...

2 months ago

Solved

Generate a vector like 1,2,2,3,3,3,4,4,4,4

Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2...

2 months ago

Solved

Reverse the vector

Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]

2 months ago

Solved

Maximum value in a matrix

Find the maximum value in the given matrix. For example, if A = [1 2 3; 4 7 8; 0 9 1]; then the answer is 9.

2 months ago

Solved

Doubling elements in a vector

Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...

2 months ago

Solved

Vector creation

Create a vector using square brackets going from 1 to the given value x in steps on 1. Hint: use increment.

2 months ago