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统计学

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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 ...

13 years 前 | 1 个回答 | 0

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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-...

13 years 前 | 2 个回答 | 0

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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...

13 years 前 | 1 个回答 | 0

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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...

13 years 前 | 0 个回答 | 0

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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. ...

13 years 前 | 1 个回答 | 0

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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...

13 years 前 | 2 个回答 | 0

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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...

13 years 前 | 1 个回答 | 0

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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 (...

13 years 前 | 2 个回答 | 0

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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...

13 years 前 | 0 个回答 | 0

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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...

13 years 前 | 1 个回答 | 0

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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...

13 years 前 | 0 个回答 | 0

0

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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...

13 years 前 | 2 个回答 | 0

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