New answers tagged numerics
2
votes
Accepted
Plotting an integral with solving for a specific constant
As an example, we take a simple function that we can integrate analytically:
f[t_] = t + 2;
Integrate analytically:
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1
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Using ParametricNDSolveValue and MultiNonlinearModelFit to fit an ODE system to datasets
I split the data values and uncertanties into two separate lists, and also grab the time values:
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0
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Triple Summation Calculation Which Includes an Integral
There were typos in the code you posted as I noted in the comment above. You had terms like C_j, etc., which should be c[j], etc. Since you're interested in a numerical result, I replaced Integrate ...
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When does arithmetic with approximate numbers not follow basic properties?
More of a long comment, I guess:
Note to others: Mathematica is not IEEE 754 compliant, even though it is built from libraries that are mostly compliant (for ...
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4
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3
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Modeling experimental data with differential equations
This should help you underway, but I couldn't find good starting values for the parameters:
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Multiple solutions from NSolve
With the OP's sol, we can gather the similar solutions together, find their mean, and if desired, polish them up with FindRoot:
<...
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4
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Accepted
How to solve this integral equation numerically?
Although the general problem in the question probably requires the methods referenced by flinty in 285076, the specific problem contained in the question's code, ...
- 60.7k
0
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Solving A System of Two Implicit Equations
An alternative approach is to use FindRoot or FindMinimum without constructing an ...
- 60.7k
4
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Accepted
3
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Multiple solutions from NSolve
For parametric research it could be better to use FindRoot as follows
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Multiple solutions from NSolve
Setting WorkingPrecision->20, it then takes 85 sec. and gives only 3 solutions, although it gives a warning that the input is less precise than working precision:
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- 47.2k
1
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Accepted
1
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Plot after applying NIntegrate
int is producing seemingly random numbers because AccuracyGoal -> 5, PrecisionGoal -> 4 are too small. Increasing the ...
- 60.7k
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