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# Joseph

### RMIT

Last seen: 10 months ago Active since 2013

Professional Interests: geophysical antennas

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Question

matrix manipulation of a large diagonally symmetric matrix to reduce computational time
Hi there, Given a large square matrix (maybe up to 20k X 20k). I would like to reduce computational time for calculating speci...

9 years ago | 0 answers | 0

### 0

Question

genetic algorithm Mixed Integer Optimization linear vs nonlinear constraint
Hi there, I'm using ga function for my nonlinear objective with 2 constraints as a function of 3 variables variable 1 - con...

9 years ago | 1 answer | 0

### 1

Question

non-linear optimization over a frequency bandwidth
Hi there, Is it possible to optimize a function over a frequency bandwidth? Given I have a non-linear function say Vout(f) an...

9 years ago | 2 answers | 0

### 2

Question

create a ndgrid given based on string variable input
Hi there. Let's start say I'm given a 1x2 cell list.. t={'x1','x2'} % and T = upper(t) % upper case of t After...

9 years ago | 1 answer | 0

### 1

Question

finding intersection of between surfaces and extended to n dimensions
Hi there, if given a main objective function (non-linear) f(x,y) and constraints (non-linear) g1(x,y)=C1 g2(x,y)=C2 ... ...

9 years ago | 1 answer | 0

### 1

Question

matrix multiply even and odd by different value
Hi, given a matrix zj NL=4;NV=6;xiz=0.011e-3;f=1; zj=repmat((1:NL),NV,1) Let i be the rows and j be the column el...

9 years ago | 1 answer | 0

### 1

Question

trim cell array from known characters
Hi There, How do you trim down a cell array from a space or empty element in the cell and as well remove all commas and semi ...

10 years ago | 1 answer | 0