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dominik


Istituto Universitario Europeo

Last seen: 9 jours il y a |  Actif depuis 2013

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How to apply functions to symmatrix objects, in the same way as to sym objects.
Hi I work with symbolic matrix objects, defined as symmatrix. Unfortunatly, symmatrix is not compatible with as many functions...

3 mois il y a | 1 réponse | 0

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Operations and differentiation with symmatrix in MATLAB... possible bug?
Hi I have found matlab to behave unexpectedly when using the symmatrix. I dont understand it, maybe i misunderstood the way ope...

4 mois il y a | 1 réponse | 0

1

réponse

Question


MATLAB seems to use multiple cores and threads but not processors
Hi I have a computer with 2 processor, 10 cores each, 2 threads per core. When I run say a big matrix multiplication the win...

plus de 7 ans il y a | 1 réponse | 0

0

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Question


difference corr and autocorr
Hi why does ac1=corr(x(1:end-1),x(2:end)) not yield the same as ac2=autocorr(x); ac2(2) ? Many thanks!

environ 8 ans il y a | 1 réponse | 0

0

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Question


derivative of cubic spline for use in nonlinear optimization
Hi i wanna solve a functional system of nonlinear equations by collocation. To speed up the solution process i want to provi...

plus de 9 ans il y a | 1 réponse | 0

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Réponse apportée
bug in matlabFunction when passing unspecified symbolic function?
I still think it's a bug but as a workaround, one can define auxiliary variables syms Dfx Dfy Dfz and substitute them ...

environ 10 ans il y a | 0

Question


bug in matlabFunction when passing unspecified symbolic function?
Hi the function _matlabFunction_ seems to do a mistake with undefined functions. It seems to work all right if there is on...

environ 10 ans il y a | 1 réponse | 0

1

réponse

Réponse apportée
General function in symbolic toolbox
Hi Thanks for the answer, it seems I havent expressed my question clearly. In what you propose you define the function explic...

environ 10 ans il y a | 0

Question


General function in symbolic toolbox
Is it possible in the matlab symbolic toolbox to define general functions, i.e. to define functions only as a general mapping fr...

environ 10 ans il y a | 3 réponses | 1

3

réponses

Question


constrained maximization, share variables of tagret function and constraint
I want maximize a function f(x) s.t. nonlinear cosntraints c(x). Both the function f(x) and c(x) contain a computation step g(x)...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question


getting slope information from griddedInterpolant
Hey when evaluating a griddedInterpolant, the computer should at some pont determine the slope of the interpolant at the query ...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question


nested loops in parfor, indexing
Hey im trying to solove an equation system over a 4 dimensional grid of parameter values. Since the difference between neigbo...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question


costly anonymous function declaration for solving a equation system with parameters
Hi i have to solve a equation system (which is a matlab functiion)for many parameters values, so i run a loop over the paramete...

plus de 10 ans il y a | 1 réponse | 0

1

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Large broadcast variable in parfor loop
I got it running.... but it seems this submission does only work for cells and matrixes. When I try to share a griddedInterpolan...

plus de 10 ans il y a | 0

Question


Large broadcast variable in parfor loop
Hi Im having a for loop that i want to parallelize. In the loop th essential part is an interpolation. The problem is that t...

plus de 10 ans il y a | 2 réponses | 0

2

réponses

Question


Can querying "TriScatteredInterp" be as fast as "griddedInterpolant"?
Hi, im wondering why querying the TriScatteredInterpolant is so much slower and so much more size dependent than griddedInterpol...

environ 11 ans il y a | 1 réponse | 0

1

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cubic spline interpolation of a function that yields NaNs when evaluated at some of the grid points.
Update: I have above described the behavior of griddedinterpolant wrongly. I found that cubic interpolation is possible with...

environ 11 ans il y a | 0

Réponse apportée
cubic spline interpolation of a function that yields NaNs when evaluated at some of the grid points.
Thanks for ur tips! I thought about doing that (putting an arbitrary number in place of the NaNs), but was recluctant to do s...

environ 11 ans il y a | 0

Question


cubic spline interpolation of a function that yields NaNs when evaluated at some of the grid points.
Hi i want to cubic spline interpolate an unknown function defined over a 3 dimensional domain, whose values i know at the gridp...

environ 11 ans il y a | 3 réponses | 0

3

réponses

Réponse apportée
griddedInterpolant (via e.g. interp1) bug with NaNs?
Hey, I have the same problem: I define a griddedinterpolant IP over a grid G and the values V. whenever I evaluate IP at a gri...

environ 11 ans il y a | 0