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I found that in teqp one of the models was failing because the derivatives of ``pow(delta, int)`` are not calculated properly when ``delta`` is ``0``. Here is a Catch2 test snippet showing the problem…
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## Summary
fMRIPrep and ASLPrep now support a `--derivatives` parameter, where users can provide paths to pre-computed derivatives.
This could be useful if we want to provide paths to FreeSurfer/M…
tsalo updated
1 month ago
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Hi, I was trying to implement what [this article](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7573630/#:~:text=a%20small%20regularization%20term%20was%20added%20to%20enhance%20convergence%20by%20mini…
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Is there any way to take the nth derivative of a function (without making a function for each individual derivative). i.e.
```math
f(x) = x^3
```
```math
f_n(n, x) = \frac{d^n}{{dx}^n} ( f(x) …
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I just tried to build [Dietmar Warning's fork of the ekv3 model](https://github.com/dwarning/ekv3model) and found that Xyce/ADMS was incorrectly handling the (so far very rare) cases where Verilog-A m…
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@tsalo and I have been working on getting the derivatives of our dMRI post-processing workflows into BEP16 compliance. We'd appreciate some thoughts and comments on the file names we're producing. Per…
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Different outcome between 3.5.5 and 3.6.3
```python
from casadi import *
X = MX.sym("x", 2)
U = MX.sym("u")
z = MX.sym("z")
I = integrator("I","collocation",{"x": X, "p": U, "z": z, "ode": …
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Planned features for 0.1.0 version of this package
Count data model estimation `estimatePopsize` method for:
- `vgam` class
- [x] Basic functionality, derivatives, pop est, etc.
- [x] Bootst…
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When we create derivatives that overwrite existing derivatives, the user can't see anything in the interface to signify that there was any change.
Currently, to see if a derivative worked, we have …
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Extract a given time, depth, and space from sim into u, and return derivatives and rates. Should work with all types of simulations (chemostat, water column, and global)