LS

Last seen: circa 5 anni fa | Attivo dal 2011

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Domanda

interpolating missing data
Hi all, I'm trying to estimate model parameters in MATLAB using data I collected in the lab, but I didn't measure all of the ...

quasi 14 anni fa | 1 risposta | 0

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Domanda

Nonlinear Grey Box Modeling code - really slow or not working?
Hi all, At a Matlab user's great suggestion (see here: http://mathworks.com/matlabcentral/answers/12469-estimating-parameters-...

oltre 14 anni fa | 2 risposte | 0

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Domanda

estimating parameters for model of 3 differential equations
Hi all, I've been having a lot of trouble figuring out the best way to estimate parameters in Matlab. Does anyone have sugges...

oltre 14 anni fa | 1 risposta | 0

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Domanda

Adding weight to data points
Hi all, I'm working on basic model fitting in Matlab and now I'm trying to figure out how to add weight to certain data point...

oltre 14 anni fa | 0 risposte | 0

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Domanda

fitting logistic growth equation to data
Hi all, I'm trying to fit the logistic growth equation to a set of algae growth data I have to calculate the growth rate, r. ...

oltre 14 anni fa | 1 risposta | 0

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Domanda

setting up code to run matrix of parameter values
Hi, I've written the code I've put below to run two functions sequentially. I'm trying to see what the effect of changing the...

oltre 14 anni fa | 2 risposte | 0

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Domanda

Running two scripts containing different functions consecutively
Hi, I need to run two scripts (containing two different functions) consecutively and I'm wondering if there's a way to write a s...

oltre 14 anni fa | 1 risposta | 0

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Domanda

Constraining equilibrium solver to positive values (fsolve, lsqnonlin)
From my understanding, it's impossible to constrain fsolve to only find positive zeros but that it is possible using lsqnonlin (...

oltre 14 anni fa | 2 risposte | 0

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risposte

Domanda

fsolve vs. running a model to equilibrium
Hey all, So I've been asking a lot of questions about a set of models I'm trying to find the equilibrium of and I've gotten a l...

oltre 14 anni fa | 0 risposte | 0

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Domanda

ODE solver for stiff system with 1 variable close to 0
Hi, I'm solving a system of equations to model Daphnia and algae in a chemostat. I've already asked one question about this sys...

oltre 14 anni fa | 1 risposta | 0

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risposta

Domanda

giant spikes in model from equilibrium when run for relatively long time periods
Hi, I'm working on a model of Daphnia and algae in a chemostat, and when I run the code below for more than 300 days or so, the...

oltre 14 anni fa | 0 risposte | 0

0

risposte

Domanda

Incorrect equilibrium values using fsolve
Hi! I'm using fsolve to find equilibrium values of a series of three differential equations ( the Droop model). I've been using...

oltre 14 anni fa | 2 risposte | 0

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