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John Billingham


University of Nottingham

Last seen: 8 giorni fa Attivo dal 2014

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Professor of Theoretical Mechanics School of Mathematical Sciences The University of Nottingham UK Professional Interests: Scientific computing

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Domanda


Why does fmincon using the sqp algorithm need a full matrix to specify linear constraints?
I need to specify that some of the variables in my optimization need to be ordered, so v_i-v_(i+1)<0 for i = N_1 to N_2. This ...

quasi 3 anni fa | 2 risposte | 1

2

risposte

Domanda


Spline with clamped end conditions using griddedInterpolant
I can create a piecewise polynomial spline with clamped end conditions from vectors x and y using pp = spline(x,[dy1 y dy2]) ...

circa 3 anni fa | 1 risposta | 0

1

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Domanda


How can I clear persistent variables from a function using only its handle?
For example, say I have a simple function, _test1_, function test1 = test1(x,y) persistent k if isempty(k), k = sum(y); e...

circa 8 anni fa | 2 risposte | 0

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Domanda


How can I create an ordinary floating point function from a symbolic array
If I have some code that generates a symbolic array, I'd like to be able to turn it into a function that takes floating point in...

oltre 8 anni fa | 1 risposta | 0

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Risolto


The Hitchhiker's Guide to MATLAB
Output logical "true" if the input is the answer to life, the universe and everything. Otherwise, output logical "false".

quasi 10 anni fa

Domanda


How can I use zlib in a C mex file and use gz compression?
I need to use zlib to do gz compression within a C mex file. Something like #include < zlib.h > gzFile fi = gzopen(f...

oltre 10 anni fa | 1 risposta | 0

1

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Domanda


How can I convert individual guis into a single tabbed gui?
I have a gui that pops up another gui when a button is pressed. I'd like to convert this into a single gui with two tabs. Can an...

oltre 10 anni fa | 1 risposta | 0

1

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Domanda


Accessing a cell array of cell arrays in a C++ mex file
I'm writing a large code that requires me to use a cell array of cell arrays of single precision real matrices. This may seem od...

circa 11 anni fa | 1 risposta | 0

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Domanda


Problem with simplify(x^(1/log(x)).
>> sym x; >> assume(x>0) >> simplify(x^(1/log(x)),'IgnoreAnalyticConstraints',true) >> ans = x^(1/log(x)) Note that x^(1/...

oltre 11 anni fa | 1 risposta | 0

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Domanda


Struggling to distribute a cell array across several parallel workers
I have some code, part of which a structure of the form below. for a = 1:A for b = 1:B for c = 1:C f...

oltre 11 anni fa | 0 risposte | 0

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Domanda


Finding parfor baffling: Can anybody explain to me why this little bit of code works with for,but not with parfor?
function B = partest A = 1:4; B = zeros(1,4); parfor j=1:2 B([j j+2]) = A([j+2 j]); end The...

oltre 11 anni fa | 2 risposte | 2

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