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SimBiology Diagram & Repeated Assignment Rules
As of the current release (R2013b), SimBiology diagrams only shows species, compartments, and reactions. As you suggest, the onl...

environ 12 ans il y a | 0

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Simbiology Error: "Error evaluating rate rule (............) at t=0.0000"
Hi Cansu, This message means that your rate rule could not be evaluated because it is invalid for some reason. This could hap...

environ 12 ans il y a | 0

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What's the problem that makes my MATLAB busy?
You interrupted ode45, the function that solves your ODEs. This means MATLAB was still busy integrating your ODEs. It can tak...

environ 12 ans il y a | 0

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Simbiology Error- Invalid assignment syntax or parse error for rule
Hi, When you write a rate rule in SimBiology, you don't write the d/dt on the left-hand side of the equations. For example, t...

environ 12 ans il y a | 0

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How exactly does SimBiology treat model objects?
Hi Sam, As you discovered, a SimBiology model is a "handle" object. This means that your variables model and model2 both refe...

environ 12 ans il y a | 2

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Simbiology fails to load dataset, model fit and simulation
Hi Peter, You can try increasing the amount of memory allocated to Java. You'll find instructions <http://www.mathworks.com...

plus de 12 ans il y a | 0

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Why can't I load Simbiology data?
Hi Ted, It's possible that the SimBiology project was corrupted. I think your best bet is to contact Tech Support and see if ...

plus de 12 ans il y a | 0

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ベクトルのスケーリング
入力したベクトルの大きさを１にしてください。

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Upper limit or saturation
Hi Peter, The "right" way to implement an upper limit or saturation really depends on how you want to physically model the ef...

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How to change ode solver settings for a Simbiology model?
Hi Zoltan, Yes, there is a way to change several options related to the ODE solver, including the absolute and relative toler...

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Problem starting Simbiology in MATLAB
Hi Akintunde, This problem generally means you have an inconsistent version of files in your installation. Could you have ins...

presque 13 ans il y a | 0

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Non negative values for species in Simbiology
Hi Kieran, I'm just going to paste an answer to a similar question from a MATLAB <http://www.mathworks.com/matlabcentral/news...

presque 13 ans il y a | 1

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the desktop could not fit the 3 compartment PK model.
Hi Yang, When you specify that your model has linear{Cl,V} in the Central compartment, then a parameter named "Cl_Central" sh...

presque 13 ans il y a | 0

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Parameter estimation with sbioparmestim, using experimental data replicates or averages / standard deviations
Hi, sbioparamestim does not currently support fitting data that contains replicate measurements. To use sbioparamestim, you w...

presque 13 ans il y a | 0

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How do I do parameters Estimation in SimBiology using Optimization toolbox?
Hi, Calling lsqnonlin via sbioparamestim uses slightly different default options than calling lsqnonlin directly. The referen...

environ 13 ans il y a | 0

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simbiology parameter estimation with dosing schedule
Let me go ahead and take a stab at answering this. With additional clarifications, I can offer a more tailored example. You u...

environ 13 ans il y a | 0

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Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

environ 13 ans il y a

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Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

environ 13 ans il y a

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Is my wife right?
Regardless of input, output the string 'yes'.

environ 13 ans il y a

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Numerically accuracy problem in solving ODEs when subtracting two close large numbers
First off, you mention a parameter nu, but it's not referenced anywhere in your equations. I'm guessing it is a parameter that i...

environ 13 ans il y a | 0

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How can i define a parameter with if condition?
Hi, The short answer is that SimBiology cannot *directly* use "if" or "switch", but you *can* use them *indirectly* by puttin...

environ 13 ans il y a | 0

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Individual or population fit in simbiology
Hi, First off, I now see you posted a similar follow-up comment on a previous question. I don't get notified of such replies,...

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Get data through a currently empty link
Hi Xiaoqing, If you have SimBiology, you already have the data. Just load it from the file pheno.mat, as described in this ex...

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How to fit kinetic law parameters to a multiple data set?
Hi, It is possible to estimate a single set of parameter using multiple experiments using the "individual fit" estimation met...

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Why do i get a task error message that "CAT Arguments dimensions are not consistent" in a simulation task?
Hi Martin, I believe this is due to a bug that was fixed in MATLAB R2011b. Is this the only reaction in your model? Becaus...

plus de 13 ans il y a | 0

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ODE solver with Heavaside function
Hi, You need to take special care when your system of ODEs contains a step change, like a Heaviside function. These can be ha...

plus de 13 ans il y a | 0

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Matlab ode solver and Simbiology gives different results on the same model
Hi, If you are using MATLAB version R2012b, you can get a text version of the ODE equations and see where they differ from yo...

plus de 13 ans il y a | 1

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How can I set the step size to a constant value for the ode solver in simbiology?
Hi Scott, SimBiology does not support a true fixed step solver, but if your real goal is to have simulation at specific times...

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How to solve a compiler related problem to make a Parameter Fit run
Hi Martin, My guess is that MATLAB has still not been properly set up for use with Xcode. Were you following the instructions...

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Problems with the 'null' variable in Simbiology
Hi David, The problem is with the units on the rate constant for the reaction null -> T. Let's say you have the reaction rate...

plus de 13 ans il y a | 0