315 reputation
110
bio website
location
age
visits member for 1 year, 1 month
seen 14 hours ago

Apr
11
comment Don't understand why Mathematica is complaining about my Graph expression; how can I fix it?
@Szabolcs Graph3D, you do not know how happy that makes me.
Apr
11
comment Check Specific Connections within Graph
I had an apparently undue paranoia of using Graph objects more than needed. Thank you for correcting that.
Apr
11
comment Check Specific Connections within Graph
Thank you. The fold increase despite the Graph object is impressive. (Orders of magnitude for my function of interest.)
Apr
11
accepted Check Specific Connections within Graph
Apr
10
asked Check Specific Connections within Graph
Apr
5
accepted Don't understand why Mathematica is complaining about my Graph expression; how can I fix it?
Apr
4
awarded  Yearling
Apr
4
comment Don't understand why Mathematica is complaining about my Graph expression; how can I fix it?
Thanks, Rasher!
Apr
4
comment Don't understand why Mathematica is complaining about my Graph expression; how can I fix it?
Thank you, Szabolcs. The latter (Arrow -> Identity) allows for what visualization I need without resorting to GraphPlot3D (retain styling defaults of Graph, too). Glad to possibly have found a bug and to have prompted an answer from you. Will wait little bit for good measure, then accept an answer.
Apr
4
revised Don't understand why Mathematica is complaining about my Graph expression; how can I fix it?
edited title
Apr
4
asked Don't understand why Mathematica is complaining about my Graph expression; how can I fix it?
Aug
18
awarded  Revival
Aug
18
revised Autonomous equations' critical points and eigenvalues
deleted 26 characters in body
Aug
18
answered Autonomous equations' critical points and eigenvalues
Aug
11
comment ParametricNDSolveValue or NDSolve + fitting
I, too, am interested in any progress on this. I noticed in chat on 1/16 @OleksandrR. linked to this excellent example (which actually does what I've pieced together previously, wish I had found), and shortly afterwards pointed out complications with general systems with more parameters than datasets. Fitting a system suspected to be determined in large part by the dataset of one variable, it sounded like you had something going there. Will keep sniffing about...
Aug
11
comment How to fit 3 data sets to a model of 4 differential equations?
I'm not mistaken in thinking that, for a properly constructed system, this specification of reasonable initial parameters occurs in the definition of "ordinates," am I? I don't see where but I feel there might be some other area where I should do this as well.
Jul
28
comment How to fit 3 data sets to a model of 4 differential equations?
@OleksandrR. Ah, alright; I had noticed your comment on this but didn't think to apply it. Thank you again, I really appreciate it.
Jul
24
comment How to fit 3 data sets to a model of 4 differential equations?
Specifying lower Precision and Accuracy Goals (of 1) causes the error "Encountered a singular linear system at t$21204 = 3.66... Unable to continue," instead. It isn't particularly problematic as I am more concerned with adapting the answer to my (drastically different) system, but I figured I would say something in case another user runs into the same issue. Regardless, great answer.
Jul
24
comment How to fit 3 data sets to a model of 4 differential equations?
In evaluating the line defining "fit," I end up getting an error of (at t ~ 2.65) "step size is effectively zero; singularity or stiff system suspected," regardless of whether or not I input Method -> "StiffnessSwitching" in Mathematica 9.0.1. Has anyone else had this issue? I tried re-copying each section in a new notebook (as opposed to the within the NB example you linked to) to no avail.
Jul
22
comment Equating two lists, element by element
Thanks, @IstvánZachar. I just now saw your comment.