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Seetha Rama Raju Sanapala


Last seen: 8 months ago |  Active since 2014

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Passionate about science and science propagation. Currently teaching signal processing and MATLAB.

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Question


sum of all the variables in workspace how to find?
I have some 100 numbers in the workspace with big names. I want to find the sum of all these variables in the workspace - witho...

6 years ago | 2 answers | 0

2

answers

Question


Comparison of gensurf and surf
What is special about gensurf? Why is it needed when we have already mesh and surface plot commands like mesh and surf?

6 years ago | 0 answers | 0

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answers

Question


Tried to change the diagonal elements of a magic square. Could not understand the error message.
a= magic(6), diag(a)=[1 0 2 0 3 4] Error message that I got was "Subscripted assignment dimension mismatch". Do not un...

6 years ago | 1 answer | 0

1

answer

Question


finite word length effects - related questions get little different results than expected - why?
We know that all computers suffer from finite word length effects. We can expect some errors - but why some related questions g...

6 years ago | 0 answers | 0

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Question


why current sample always is 513 in audioplayer properties?
I have used audioplayer several times and do not understand the meaning of several properties of audioplayer that is displayed ...

6 years ago | 0 answers | 0

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Question


We create plots from vectors x and y. Is the reverse possible? Can you first draw a curve using cursor in the figure palette and then create vectors x and y from it?
We create plots from vectors x and y. Is the reverse possible? Can you first draw a curve using cursor in the figure palette a...

6 years ago | 1 answer | 0

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Question


I want to generate random (integers only between -10 and 25) mathematical expressions and also evaluate them. Can someone help with the code?
I want to generate random (integers only between -10 and 25) mathematical expressions and also evaluate them. For example -1 + ...

6 years ago | 3 answers | 0

3

answers

Question


In the example given in MATLAB communication toolbox under "16-QAM with MATLAB functions", it looks like the raised cosine filtering has degraded BER. Where is the catch?
In the example given in MATLAB communication toolbox under "16-QAM with MATLAB functions", it looks like the raised cosine filte...

7 years ago | 0 answers | 0

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Question


Is Hilbert transform not defined for complex signals? In MATLAB, the function hilbert ignores if you give a complex sequence as input. Why?
Is Hilbert transform not defined for complex signals? In MATLAB, the function hilbert ignores imaginary part if you give a compl...

8 years ago | 1 answer | 0

1

answer

Question


Question on function variables i.e. ~
[~,I] = max(abs(xc)); This is code taken from an example in MATLAB. I read somewhere that ~ can be used to indicate 'don't ca...

8 years ago | 1 answer | 0

1

answer

Question


On 'Publishing' mathematical equations using MATLAB
I am at a loss to understand the publishing of mathematical equations using MATLAB for which you can use 'publish' command. I t...

8 years ago | 0 answers | 0

0

answers

Question


How to interpret this result max on a function just like using fplot on function?
How do we explain this result from MATLAB? >> max('sin(x)') ans = 120 Also help of max says "POLYNOM/max ...

8 years ago | 1 answer | 0

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answer

Question


The working of perms
I tried perms('abc'). The doc says it is permutations in reverse lexicographic order. So I expected from the bottom - abc, acb...

8 years ago | 2 answers | 0

2

answers

Question


Considering only 2-D arrays i.e. matrices only, is there a difference between flip(a) and fliplud(a)?
Considering only 2-D arrays i.e. matrices only, is there a difference between flip(a) and flipud(a)?

8 years ago | 2 answers | 0

2

answers

Question


I want to show that 17^21 + 19^21 is divisible by 36 by actual computation of the integers and getting the remainder by division. Is it possible in MATLAB?
I want to show that 17^21 + 19^21 is divisible by 36 by actual computation of the integers and getting the remainder and quotien...

8 years ago | 2 answers | 0

2

answers

Question


inverse of sinc function : how to evaluate?
Why does the following does not work in MATLAB? solve sinc(x)==0.707

9 years ago | 1 answer | 1

1

answer

Question


hw = phased.FMCWWaveform('SweepBandwidth',1e5,... 'OutputFormat','Sweeps','NumSweeps',2); plot(hw);
hw = phased.FMCWWaveform('SweepBandwidth',1e5,... 'OutputFormat','Sweeps','NumSweeps',2); plot(hw); Why does this code ...

9 years ago | 1 answer | 0

1

answer

Question


Can we find the fourier transform of a function?
In symbolic tool box, there is a function called fourier which is supposed to give the FT of a function. Example below works ...

9 years ago | 1 answer | 0

1

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Question


I have a 1000 element vector. I want to know if it has got any of its 2 or more elements equal. Is there a command to check this?
I can write a program to check if any of the elements are identical. But wanted to know if there is a built in command and or f...

9 years ago | 1 answer | 0

1

answer

Question


Is there a difference between plot(x,y,'x') and scatter(x,y,'x')?
Is there a difference between plot(x,y,'x') and scatter(x,y,'x')?

9 years ago | 1 answer | 0

1

answer

Question


Are there commands to close desktop windows like workspace, figure, command history?
We can close those windows using 'x' mark on the window but I want to close using commands at the prompt. Are there any command...

9 years ago | 1 answer | 0

1

answer

Question


Is there a way to play a movie in MATLAB in other than avi formats? Is there a counterpart to audioread?
Is there a way to play a movie in MATLAB in other than avi formats? Is there a counterpart to audioread? videoplayer is there ...

9 years ago | 1 answer | 0

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Question


Measuring the length of a song
Suppose I have a code segment like this for measuring the time length of the song. player = audioplayer(y, Fs); tic ...

9 years ago | 1 answer | 0

1

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Question


Is there a way to play mp3 files or files other than .wav in Matlab?
I could play .wav files using sound or audioplayer commands. But these can not play mp3 or other files. Is there a way to play...

9 years ago | 1 answer | 0

1

answer

Question


microphone plot response documentation results different from execution results
I have taken an example program from MATLAB documentation as below (phased array) freq = [500 1000]; hmic = phased.Custo...

9 years ago | 1 answer | 0

1

answer

Question


I want to use ezpolar with line colour, style, width control. Is this possible?
I want to use ezpolar with line colour, style, width control. Is this possible?

9 years ago | 1 answer | 0

1

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Question


How to use kaiserord?
I am a bit confused about F and A input arguments in kaiserord. F should be of twice the length of A minus 2, it says. I am cl...

9 years ago | 0 answers | 0

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answers

Question


Entering power in MATLAB title
I wanted to write e^(-1000|t|) in matlab title of a plot. When I entered this and ran it actually, it showed ( as a superscript ...

9 years ago | 1 answer | 0

1

answer

Question


deconv result does not match with polynomial division.
I wanted to divide x^2+5x+6 by x+1 and get the quotient and remainder and used deconv as below. [q,r]=deconv([6 5 1], [1 1]) ...

9 years ago | 1 answer | 0

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Question


Question on residuez results
I wanted to partial fract the following 3x^2+x-2/(((x-2)^2)(1-2x)) I wrote the following a=conv([-2 1],[-2 1]); a=co...

9 years ago | 1 answer | 0

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answer

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