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10h
reviewed Leave Closed import from Excel adds a point to each number …How to get rid of it?
10h
comment import from Excel adds a point to each number …How to get rid of it?
@TraceKira excelSheet /. x_?NumericQ :> With[{r = Round[x]}, r /; r == x] is more robust, or since it's Excel, x_Real instead of x_?NumericQ. (You might not want to convert 6.4 to 6. This replacement rule will round to an integer only if the rounded value is equal to the original number.)
11h
comment Trouble Discretizing a ParametricRegion; Joukowsky Map and Wing Profiles
Do you have 10.0.2? (My employer's IT dept. is very slow to make upgrades available, and I have only 10.0.1.) The region functionality is still under development, and one might expect the situation to improve.
14h
comment Trouble understanding NeumannValue and Inactive/Formal PDEs
I'm not sure how Inactive interacts with NDSolve, but I would have first tried NDSolveValue[{-Inactivate[Div[Grad[u[x], {x}], {x}], Div | Grad] == <..>], which seems to work. (Maybe it's a bug?)
14h
reviewed Close Why is Likelihood / LogLikelihood not working?
14h
reviewed Leave Open import from Excel adds a point to each number …How to get rid of it?
19h
comment Help to numerically solve ODE
No problem. While it might be just me, I thought it would be helpful to you to let you know that I didn't think many people would be encouraged to figure out this problem in its current form. Already in the subject of diff. eqns., not many regular users contribute answers, so it helps to make the question as attractive as possible. :)
19h
comment RegionPlot of a function determined from NDSolve solution
While I prefer the form of output of NDSolve, beginners sometimes find NDSolveValue easier to work with. Look at the documentation for each, and pay careful attention how they are used to get numerical output and how they are plotted. (I don't have time to look carefully at your problem right now, -- sorry.)
20h
comment RegionPlot of a function determined from NDSolve solution
There's a ';' in your RegionPlot that should probably be a , -- I'm going to assume that you have checked that Evaluate[ode2[tp, \[Theta], M][[1]], {tp, 0, 40}] produces a number when you input numbers for the variables. But looking at it after I pasted it into the comment makes it hard to see how it does that.
20h
reviewed Reviewed RegionPlot of a function determined from NDSolve solution
20h
comment RegionPlot of a function determined from NDSolve solution
Welcome to Mathematica.SE! I suggest the following: 1) As you receive help, try to give it too, by answering questions in your area of expertise. 2) Read the faq! 3) When you see good questions and answers, vote them up by clicking the gray triangles, because the credibility of the system is based on the reputation gained by users sharing their knowledge. Also, please remember to accept the answer, if any, that solves your problem, by clicking the checkmark sign!
20h
reviewed Reviewed Return the incomming expression on false
20h
comment Return the incomming expression on false
Welcome to Mathematica.SE! I suggest the following: 1) As you receive help, try to give it too, by answering questions in your area of expertise. 2) Read the faq! 3) When you see good questions and answers, vote them up by clicking the gray triangles, because the credibility of the system is based on the reputation gained by users sharing their knowledge. Also, please remember to accept the answer, if any, that solves your problem, by clicking the checkmark sign!
20h
comment Help to numerically solve ODE
It may be just me, but I'm finding the form of this question discourages me from investigating. I have to go another site, read a few posts, and think about the problem to understand it. A clear, self-contained statement of what is being sought and which two computations do not agree would be helpful. Several lines of code do nothing, because they are terminated by semicolosn and the results discarded. Other lines might be titles? I wonder which things are important. And I have to ask myself, do I want to get involved in something that looks like a hopeless tangle of ideas and code.
22h
comment Get rid of Error Function: How to get rid of sequential appearances of error function?
+1. But I think the 0. I is not from numerical noise, but because the numerical type used in the computation is a machine/floating-point Complex, which is displayed with + 0. I when the imaginary part is zero.
22h
comment Get rid of Error Function: How to get rid of sequential appearances of error function?
The error function is a standard higher transcendental function, so it should be considered a "clear form." Further it cannot be written in terms of elementary functions. Unless the error functions cancel each other out (there are identities after all), I do not see how you are going to get rid of it.
23h
comment Find $\phi$ as function of $\theta$ for Villarceau circle in a torus
I'm not sure what your question is.
1d
revised Design matrix rank does not match
Fixed typos
1d
answered Trouble Discretizing a ParametricRegion; Joukowsky Map and Wing Profiles
1d
comment How do I plot results of complicated calculations in Mathematica?
What version of Mathematica do you have? Since version 9, there is ParametricNDSolve and WhenEvent has replaced "EventLocator".