Community Profile

# Ajay Pattassery

### MathWorks

110 2019 年以降の合計貢献数

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.

#### Ajay Pattassery's バッジ

Using subs on contents of a cell
You can substitute I1 with I_val and I2 with I_val seperately. I = subs(cell2sym(I),I1,I_val); But once you do substitution w...

21日 前 | 0

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how can I silently uninstall MatLab R2017

22日 前 | 0

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How can I genereate only one h file?
Hello, You can have a single header file modelname.h as codegen output by setting the File packaging format in Simulink Model C...

22日 前 | 0

Expressing a matrix with parameters and letters
Define the variables F1, F2, and F3 as symbolic variables. syms F1, F2, F3 B = inv(A); b = [0 F1 0 F2 0 F3 0 0 0 ]’; x = B*b...

22日 前 | 1

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Histogram with different sized bins and edges to illustrate wave periods
The following code will plot the above bar graph waveperiods = (9:21); observations = [1 5 14 22 28 5 6 2 1 0 1 0 0]; groups ...

24日 前 | 0

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Unable to play audio because no audio outputs were found
If you just want to play the music in MATLAB Online, you could use ‘sound’ instead. But it will have lesser capabilities compare...

25日 前 | 0

finding sub sequences of a data set
I assume you want to extract a sub-vector of length 30 from each row. But the total length of the column is 129 which is not div...

26日 前 | 0

Need to assign values to variable in a vector
The subs function helps in doing the symbolic substitution. The following snippet will do the substitution. x1=input("Please In...

26日 前 | 0

Simulink modeling from the command line

28日 前 | 0

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Input folders or files do not contain specified file extensions:
Here if you do not define the ReadFcn explicitly, the default function used is imread() which is not supported for .nii extensio...

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Inserting Bounding Boxes when it is more than two together
A simple if condition before displaying the annotation will do if (size(bboxes,1) > 1) for ii = 1 : size(bboxes, 1) ...

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alt key in live script
You can disable the toolbox mnemonics by executing the following command. com.mathworks.desktop.mnemonics.MnemonicsManagers.get...

How to plot PWM signal with specific duty cycle and frequency ?
The following answer explains how to generate a square wave in Matlab with frequency,​amplitude,​voltage offset, and duty cycle....

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rand(n,1)
It is difficult to reason why exactly three different pairs generated from the above information. Atleast from MATLAB R2012a on...

Question of FFFT in Matlab
The frequency of the sine wave is defined as 128 Hz (f = 128) in the above code. Hence there will be two impulses (ideally, but ...

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Editing y limits for multiple axes using property inspector
The properties of both the axes can be edited by using the property inspector. If the right axes property needs to be edited, f...

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Audio Record Object Empty when trying to start/stop with buttons in AppBuilder
Here the recObj is local to the function RECORDButtonPushed and its scope is limited to that function. Hence it is not accessibl...

Bug with conv2
The above output from conv2 with the argument as 'valid' is expected. If you are computing in the paper the kernel needs to be ...

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Not defining backward loss leads to an 'Abstract classes cannot be instantiated' error. Why is that?
I think your MATLAB version is R2019a or earlier and you are referring to the documentation of R2019b. In MATLAB R2019a and ear...

Error when building a array code
Hello, The error is generated since the right hand side of zm3(i,j+1) = rain(:,:,2+yr*38); is a matrix with dimension 141x71...

How can I create a column matrix whose elements are unknown variables
If you know n, then you could define a column vector as vector = zeros(n,1); Later you can assign the values for each position...

How to separate the elements of a table with their names?
I am not sure of getting rid of the for-loop. But the following code can achieve what you are looking for neatly. Assume T is ...

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

3ヶ月 前 | 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...

3ヶ月 前 | 0

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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...

3ヶ月 前 | 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...

3ヶ月 前 | 0

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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...

3ヶ月 前 | 1

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

3ヶ月 前 | 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 ...

3ヶ月 前 | 1

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

3ヶ月 前 | 0