Community Profile # Ahmed Nasr

Last seen: 5 months ago Active since 2020

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Calculation of the gradient of a function in BFGS Quasi-Newton Algorithm
I have a function that I want to minimize using the BFGS Quasi-Newton algorithm. If . are given. Also, is given, ...

1 year ago | 1 answer | 0

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Question

How can I use 'Least Squares Solver and Jacobian' instead of 'fminunc'?
I want to use Least Squares Solver and Jacobian instead of fminunc, but I don't know what is the required changes must be done i...

1 year ago | 1 answer | 0

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Question

Using 'fminunc', I receive Optimization completed because the size of the gradient is less than the value of the optimality tolerance.
I use 'fminunc' to find the value of B (2*4 matrix) that minimzes the difference between the corresponding elements in two vecto...

1 year ago | 1 answer | 0

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Question

How can I calculate the first derivative of a vector with respect to a matrix?
I have x = a*B*C, where x is 1*4 vector, a is 1*2 vector, B is 2*4 matrix, and C is 4*4 matrix. How can I calculate the first ...

1 year ago | 1 answer | 0

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Question

How to simulate the outage probability of user data rate versus signal to noise ratio?
I have 4 users, and I want to simulate the outage probability which is the probability of the user data rate is less than the pr...

1 year ago | 1 answer | 0