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Seetha Rama Raju Sanapala


Last seen: 12 månader ago |  Active since 2014

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

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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...

mer än 6 år ago | 2 answers | 0

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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?

mer än 6 år 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...

mer än 6 år 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...

mer än 6 år ago | 0 answers | 0

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answers

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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 ...

nästan 7 år 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...

nästan 7 år 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 + ...

nästan 7 år 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...

nästan 8 år ago | 0 answers | 0

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answers

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...

mer än 8 år 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...

mer än 8 år 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...

nästan 9 år ago | 0 answers | 0

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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 ...

nästan 9 år 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...

nästan 9 år 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)?

nästan 9 år 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...

nästan 9 år 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

ungefär 9 år 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 ...

ungefär 9 år 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 ...

ungefär 9 år 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...

ungefär 9 år 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')?

ungefär 9 år ago | 1 answer | 0

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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...

mer än 9 år ago | 1 answer | 0

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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 ...

mer än 9 år ago | 1 answer | 0

1

answer

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 ...

mer än 9 år 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...

mer än 9 år 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...

mer än 9 år 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?

mer än 9 år ago | 1 answer | 0

1

answer

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...

mer än 9 år 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 ...

mer än 9 år 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]) ...

mer än 9 år ago | 1 answer | 0

1

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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...

mer än 9 år ago | 1 answer | 0

1

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