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Modeling dissociation using Hill function provides misleading results
Similar questions come up periodicaly. I suggest looking at my previous responses here and here. The bottom line is that both o...

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How to overcome the error "Unrecognized field name \stopTimeUseConfigset\." when simulating a simbiology model on a previous Matlab version?
SimBiology doesn't currently support opening newer projects in older versions. (This is called forward compatibility.) In fact, ...

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Simbiology in app model simulation
I think the problem comes down to the way that calculate_KTC depends on time. This function has a maximum around a time of 1. If...

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Adding erf(x) to a rule in Simbiology
You can call almost any MATLAB function within your rules (or in any expression in SimBiology). So, the expressoin "y = erf(x)" ...

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Unable to locate and load .mat file after compiled into standalone file in App Designer
I suspect the problem is that you need to include in your app additional supporting function files that are required by the SimF...

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Unites of the transfer rates
Did you enable UnitConversion for your model? If not, then you will need to manually update your entire model to use consistent ...

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Occasionally when creating a SimFunction, SimBiology returns a failure to compile error, what causes this?
Hi Craig, My guess is that this is some sort of bug. But it's hard to say definitively without reproduction steps. If you can c...

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error message - Unrecognized function or variable ‘rec’.
Your NCA program is erroring because of problems with the first row in your data. If you change that first ID from 0 to 1, and t...

casi 3 años hace | 1

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Adding equations as a function of time
I suspect the problem is with "Time". SimBiology requires you to reference time as "time" (all lowercase). If that doesn't fix ...

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The fluctuation of the content of a species between negative and positive
Can you share the model? As Jacopo mentions in the comment above, this is likely due to the difficult of solving the underlying ...

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Simbiology with compartments of different volume
I think this is because of the volume scaling of the reaction rate. I suggest calling getequations on your model, and seeing if ...

alrededor de 3 años hace | 0

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How to extract the atomic coordinates of a specific amino acid from a pdb file
What is your definition for the location of lysine amino acid? The reason I ask is that a PDB file contain information about the...

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Is there a way to turn off the slider in simbiology text boxes? They are ugly and worse than useless if you are using the text boxes for labels.
Is this problem specific to annotation blocks? If so, that's a known bug that I think was introduced in R2022b. It's on our rada...

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Adding two different dose regimes to achieve full dose scheme
I opened the project you attached, and I do see that both doses get applied. Note that I increased the simulation stop time to ...

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Adding and configuring events
Events are not restricted to specific times. They can also be used for something like this. The event trigger might look somethi...

alrededor de 3 años hace | 0

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What does a dashed line in simbiology mean?
The dashed line in the diagram indicates a species that is a catalyst. More specifically, it means the species appears as both a...

alrededor de 3 años hace | 0

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Simulate chemical reactions: how to include one polymerization step which consists of x reactions with identical rate constants?
I think SimBiology is most suited to modeling each degree of polymerization as a separate species. Building and simulating will ...

alrededor de 3 años hace | 0

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Is there any built-in code in MATLAB that calculates phi-psi angles in pdb file as the bio.pdb module in biopython does?
Yes, take a look at the ramachandran function. It's primarily designed to show these angles in a Ramachadran plot, but it has op...

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How to rectify "arrays have incompatible sizes for this operation error" in this code: (Bioinformatics-related)
Let me just start by sharing the fixed code. (I also fixed a bug in the first for loop.) ubq=getpdb('1UBQ'); for i=1:numel(ubq...

alrededor de 3 años hace | 0

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How does Matlab calculate mean squared error in sbiofit?
The MSE could be Inf for several reasons. My guess is that you have a poorly posed fitting problem. Did you see any warning mess...

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Simbiology example expression in the Tumor growth model
Hi, We chose to model the tumor weight this way so that it would be possible to perform local sensitivity analysis using tumor ...

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How can I calculate the Hessian matrix for fit results with sbiofit (SimBiology)?
I can't think of an easy way to calculate the Hessian matrix. The objective function is not analytical (since it involves approx...

alrededor de 3 años hace | 0

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how to do sensitivity analysis
Hi, It's not currently possible to use an observable as a sensitivity analysis input or output. One workaround is to perform se...

alrededor de 3 años hace | 0

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Are ADDL (additional doses) and II (interval) nlme columns supported in Simbiology datasets for model fitting?
When you actually perform the fit, you typically want one row in your data that describes each distinct dose event. (It is also ...

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Is it possible to deactivate all reactions within a compartment in SimBiology?
I think the getBlock function will give you the information you need to determine whether a reaction is inside a compartment. It...

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/tmp/.e6fa-d450-cf2c-87f9.tmp Invalid cross-device link
MathWorks recently published a bug report about this.

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How to extract value of Sobol index from the Sobol index plot generated in Matlab ?
In your comment, what do you mean by the "global sensitivity analysis tool"? Do you mean you are running a global sensitivity a...

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Creating a reaction that combines multiple individual species together in Simbiology
Hi, Your question doesn't yet completely make sense to me, so I can't yet give a direct answer. But I'll try to provide an indi...

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sbiosimulate Not Releasing Memory
My guess is that this memory usage is somehow associated with SimBiology models that are still in memory. If you want to reclaim...

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how to re-assign parameter value assigned in an active variant in SimBiology?
sbiosimulate(modelObj) will simulate using only active variants. If you set all your variants to inactive, then you should simul...

más de 3 años hace | 0