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Cyrus Tirband


Last seen: 5 years ago |  Active since 2015

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Answered
Derivative constraint in curve fitting
If you absolutely have to make sure your constraints are met, you have to change your fitting equation so that all possible solu...

5 years ago | 0

Answered
Help starting two dimensional vector plot (meshgrid and quiver) problem
Use the maxwell equation to determine the D inside the cable. Hint: define gaussian surface which is a concentric cylinder with...

5 years ago | 1

Answered
How do I draw an antenna pattern 2D and 3D figure with this data?
You have insufficient data to plot a 3D Figure, as it would require a measurement for every observation angle (combination of az...

5 years ago | 1

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Answered
How to deal with repeated data in a column of a table
It sounds like you're looking to remove repeating elements that are adjecent. If that is the case, you can test your array for d...

5 years ago | 0

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Answered
Modify and speed up a for loop
The last line can be brought outside the loop like so Mat_appo = zeros(N,N,K); for k=1:K Mat_appo(:,:,k) = (u(:,k)*u(:,k)'...

5 years ago | 0

Answered
what command should i use to have real part of the eigenvalues of the matrix in symbolic form
Use the sym command when defining the matrix m=sym('m') n=sym('n') A=sym([0 1 1/sqrt(3*n*m); 2 4 2/sqrt(3*n*m); 3 4 5/sqrt(3...

5 years ago | 0

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Answered
How to use ODE 45 to integrate equations of motion?
First, you need to write down your equations of motion. In your simple case, you have: with initial conditions Of course, ...

5 years ago | 0

Answered
Calculate the mean of nonzero pixels
Replace the last line by meanval = mean(nonzeros(masked_volume)); That said, are mask and volume the same size? Those for loo...

5 years ago | 0

Answered
Help! Trouble understanding differential equation.
Your differential equation is time-dependent, with given g(t). Ode45 works iteratively, and calls the function more than once wi...

5 years ago | 0

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Answered
Need help with cutting 37 seconds off from start of wav file.
[y,fs] = audioread(filename); filename = 'C:\Users\ajbaf\Music\mlabpost\wm7001.wav'; y(1:37*fs,:) = []; %% this deletes the ma...

5 years ago | 0

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Answered
Resampling two signals to the same sampling time and length
Interp1 should work fine here if size_input is the number of samples of your input, and size_output is the number of samples of...

5 years ago | 0

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Question


How do I change all the elements in matrix with an index larger than a certain number to zero?
I have trouble making a certain matrix even though it seems trivial. For my code I need to make a 4-D matrix A with dimensions ...

9 years ago | 1 answer | 0

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