Community Profile

# Ajay Pattassery

### MathWorks

88 total contributions since 2019

I am an Application Support Engineer at Mathworks.
I am interested in Communication, Signal Processing and Deep learning.

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

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Centered FFT & DFT: cannot devise required phase shift vector(s).
fftshift will shift the zero frequency components to the center of the spectrum.

etwa ein Monat ago | 0

How to change vertical alignment on worldmap figure?
The following code will move the meridian (longitude) labels to ‘baseline’ position. load korea map_axis = worldmap(map, ref...

etwa ein Monat ago | 0

| accepted

How to create a bounding box with a right angled triangle.
I assume that a bounding box is needed to be drawn over a right-angled triangle. x1 = [0 1 0]; y1 = [0 0 1]; polyin = poly...

etwa ein Monat ago | 0

How to find cells corresponding to zero lag in an autocorrelation function
The zero lag produces the highest value in the autocorrelation output. Hence simply finding the maximum value of the autocorrela...

etwa ein Monat ago | 0

| accepted

anyway to call checkbox in appdesigner programmatically?
I assume that you have already created a checkBox in app-designer, and you want to check or uncheck the checkBox programmaticall...

etwa ein Monat ago | 0

Why doesn't audiowrite write metadata (title, etc) to wav file?

etwa ein Monat ago | 0

Audiowrite function is not saving the title or artist information
The MATLAB function audiowrite correctly writes the title as well as Artist information to the file created. You can verify the ...

etwa ein Monat ago | 1

| accepted

create gui using matlab
You can implement the GUI using MathWorks App Designer. Invoke App Designer by entering appdesigner in MATLAB Command Window an...

etwa 2 Monate ago | 0

Noise Power for the Band limited white Noise Block
The Noise Power Parameter Specify the height or the y-axis of the PSD (Power spectral density) of the white noise. Hence the uni...

etwa 2 Monate ago | 0

Reinforcement Learning Toolbox: Discount factor issue
In the Episode Manager you could view the discounted sum of rewards for each episode named as Episode Reward. This should be the...

etwa 2 Monate ago | 0

Trying to find best fit of the shape y = a/(x-b)+c. Getting warning of badly conditioned polynomial sometimes but not always.
Try scaling and shifting the input x such that the mean of x is zero and the standard deviation as one. This scaling and shiftin...

2 Monate ago | 0

can someone explain the error in this input for loop
If you can see the issue again, revert with the error message and the code you have used. Also correct the usage of fprintf comm...

3 Monate ago | 0

Wave Upward Zero Crossing Function
The variable len3 is defined in the following loop. if xDetrended(1,1)==0 & xDetrended(2,1)>0 len3=1; end if (xDetrended(1,...

3 Monate ago | 0

Communication Toolbox General CRC Generator
Since your data is an array of integers and the General CRC Generator block expects binary, you could use an integer to bit conv...

3 Monate ago | 0

how to Use cumsum for a random variables of times to reach a certain value
I understand that you have packet arrival times generated randomly and I assume you want to find the number of packet arrival in...

3 Monate ago | 0

| accepted

Solved

Mandelbrot Numbers
The <http://en.wikipedia.org/wiki/Mandelbrot_set Mandelbrot Set> is built around a simple iterative equation. z(1) = c z...

5 Monate ago

Solved

Remove the small words from a list of words.
Your job is to tidy up a list of words that appear in a string. The words are separated by one or more spaces. Remove all words ...

5 Monate ago

Solved

Find the palindrome
Given the string a, find the longest palindromic sub-string b. So when a = 'xkayakyy'; you should return b = 'kayak';

5 Monate ago

Solved

Duplicates
Write a function that accepts a cell array of strings and returns another cell array of strings *with only the duplicates* retai...

6 Monate ago

Solved

Find common elements in matrix rows
Given a matrix, find all elements that exist in every row. For example, given A = 1 2 3 5 9 2 5 9 3 2 5 9 ...

6 Monate ago

Solved

Find the peak 3n+1 sequence value
A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

6 Monate ago

Solved

It dseon't mettar waht oedrr the lrettes in a wrod are.
An internet meme from 2003 (read more <http://www.snopes.com/language/apocryph/cambridge.asp here>) asserted that readers are re...

6 Monate ago

Solved

Summing Digits within Text
Given a string with text and digits, add all the numbers together. Examples: Input str = '4 and 20 blackbirds baked in a...

6 Monate ago

Solved

Test for balanced parentheses
Given the input inStr, give the boolean output out indicating whether all the parentheses are balanced. Examples: * If ...

6 Monate ago

Solved

Find the two-word state names
Given a list of states, remove all the states that have two-word names. If s1 = 'Alabama Montana North Carolina Vermont N...

6 Monate ago

Solved

Kaprekar Steps
6174 is the <http://en.wikipedia.org/wiki/6174_%28number%29 Kaprekar constant>. All natural numbers less than 10,000 (except som...

6 Monate ago

Solved

Read a column of numbers and interpolate missing data
Given an input cell array of strings s, pick out the second column and turn it into a row vector of data. Missing data will be i...

6 Monate ago

Solved

Implement a ROT13 cipher
Replace each character in string s1 with the character that is shifted 13 positions from it (wrap back to the beginning if neces...

6 Monate ago

Solved

Clean the List of Names
Given a list of names in a cell array, remove any duplications that result from different capitalizations of the same string. So...

6 Monate ago

Solved

Return the largest number that is adjacent to a zero
This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

6 Monate ago