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Nishitha Ayyalapu

MathWorks

Active since 2013

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

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Answered
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...

11 years ago | 1

Answered
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 ...

11 years ago | 0

Answered
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...

11 years ago | 1

| accepted

Answered
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...

11 years ago | 0

Answered
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...

11 years ago | 2

| accepted

Answered
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...

11 years ago | 0

Answered
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...

11 years ago | 1

Answered
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 ...

11 years ago | 0

Answered
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...

11 years ago | 0

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Answered
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)... ...

11 years ago | 0

Answered
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...

11 years ago | 2

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Answered
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]; ...

11 years ago | 1