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Nishitha Ayyalapu

MathWorks

Attivo dal 2013

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I'm an Application Support Engineer at Mathworks.
Professional Interests: Wireless Communications, Signal Processing

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find values in a matrix above a threshold
Let "M" be the matrix with its 1st column as month, 2nd as Day, 3rd as year, 4th as discharge. Since "threshold" is only over di...

circa 11 anni fa | 1

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Help me sketch the sprectrum of this signal.
doc angle doc real doc imag 1.) For Phase Respone plot(f,angle(X)); 2.) To plot real and imaginary parts ...

circa 11 anni fa | 0

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How can I change multiple lines in a text file?
Here is the working code. Small tweaks to your existing code solved the problem. 1.) Generate a random only for new type of m...

circa 11 anni fa | 1

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How can I use a fonction result in a new script.
doc function Example function result = Addition(X,Y) result = X+Y; end Now in any other script you can jus...

circa 11 anni fa | 0

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How can I calculate and plot the spectral power density of Square Root Raised Cosine Pulse using fft?
I edited your inital code to go from single-sided spectrum to two-sided. Fs = 10; %Sampling frequency T = 1/Fs; %Symbol...

circa 11 anni fa | 2

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How can I calculate and plot the spectral power density of Square Root Raised Cosine Pulse using fft?
However to answer how to get negative frequency axis: 1.) Do fftshit 2.) change frequency axis accordingly. Below is th...

circa 11 anni fa | 0

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hwo to solve linear time variant differential equations?
It actually depends on whether you want a numerical or a symbolic solution. 1.) For numerical solution These would be help...

circa 11 anni fa | 1

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how can I use Newton's method to find the extremum with error < 10^-4 ?
These functions can do the job: Derivative-free approach: fminsearch Derivate based approach fminunc You can ...

circa 11 anni fa | 0

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Recreating a multiport switch with code
1.) Store each data stream as a column vector (just the values). Since time stamps for all the streams are starting at 0 and sam...

circa 11 anni fa | 0

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Matrix manipulation, turning a column vector into a square matrix?
This should do the job if you have four column vectors: data = [reshape(data(:,1),100,100) reshape(data(:,2),100,100)... ...

circa 11 anni fa | 0

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how to import a file in MATLAB?
You could use readtable Lets say your data is in testdata.txt then following would create a table "T" with 7 column...

circa 11 anni fa | 2

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Deleting complete row having negative integer at any position
Here is an example code that would help: A = [22 33 43 55; 11 22 -33 44; 55 22 33 -44; 99 88 77 66]; ...

circa 11 anni fa | 1

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Remove the vowels
Remove all the vowels in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill' Output s2 is 'Jck nd Jll wn...

circa 11 anni fa

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Sort a list of complex numbers based on far they are from the origin.
Given a list of complex numbers z, return a list zSorted such that the numbers that are farthest from the origin (0+0i) appear f...

circa 11 anni fa

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Summing digits
Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

circa 11 anni fa

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Back and Forth Rows
Given a number n, create an n-by-n matrix in which the integers from 1 to n^2 wind back and forth along the rows as shown in the...

circa 11 anni fa

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Most nonzero elements in row
Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

circa 11 anni fa

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Find the numeric mean of the prime numbers in a matrix.
There will always be at least one prime in the matrix. Example: Input in = [ 8 3 5 9 ] Output out is 4...

circa 11 anni fa

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Remove any row in which a NaN appears
Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

circa 11 anni fa

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Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

circa 11 anni fa

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Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

circa 11 anni fa

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Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

circa 11 anni fa

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Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

circa 11 anni fa

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Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

circa 11 anni fa

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Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

circa 11 anni fa

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Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

circa 11 anni fa

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Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

circa 11 anni fa

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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]; and ...

circa 11 anni fa

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Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

circa 11 anni fa

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Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

circa 11 anni fa

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