Simple question in Mathematica: find value of function

In summary, the conversation discusses the issue of finding the value of x when a function F[x] has a certain expression and is computed using NDSolve and a set of differential equations. The speaker has tried using NMinimize but is still unable to find a good way to compute the value of x. Another member suggests using FindRoot, which the speaker later finds a solution for in a link they share.
  • #1
Sosi
13
1
Hi guys!

I'm trying to the value of x when a function F[x] has a certain expression. I'm computing the value of F[x] using NDSolve and a set of differential equations - all numerically. Yet, I can't find an easy and systematic way to find the value of x when F[x]=constant.

I tried using NMinimize:
Code: 
NMinimize[{Evaluate[CONSTANT- 
    F[x] /. systemofequations, x]

Yet, I can't seem to find a good way to compute the value of x.. :S

Do you guys have any suggestions on how I could try to solve this issue?
Thanks so much
 
Physics news on Phys.org
  • #2

Related to Simple question in Mathematica: find value of function

1. What is Mathematica?

Mathematica is a popular software program used for mathematical, scientific, and technical computations. It allows users to perform various calculations, plot graphs and visualizations, and solve complex equations.

2. How do I find the value of a function in Mathematica?

To find the value of a function in Mathematica, you can use the Evaluate function. For example, if you want to find the value of the function f(x) = x^2 + 3 for x = 5, you can type Evaluate[f(5)] in the Mathematica notebook. This will give you the output 28.

3. Can Mathematica handle complex functions?

Yes, Mathematica is capable of handling complex functions and equations. It has a wide range of built-in functions and tools that can handle complex numbers, matrices, and other advanced mathematical concepts.

4. How can I plot the graph of a function in Mathematica?

To plot the graph of a function in Mathematica, you can use the Plot function. For example, if you want to plot the graph of f(x) = x^3 + 2x^2 - 5, you can type Plot[x^3 + 2x^2 - 5, {x, -5, 5}] in the Mathematica notebook. This will generate a graph of the function between the x-values of -5 and 5.

5. Can I export the results from Mathematica to other programs?

Yes, Mathematica allows you to export your results to various formats, such as PDF, HTML, CSV, and more. You can use the Export function to save your results in a desired format and then import them into other programs for further analysis or presentation.

Similar threads

Mathematica Problems solving this differential equation for a Pendulum with Mathematica
    • MATLAB, Maple, Mathematica, LaTeX
Replies
4
Views
2K
Mathematica Mathematica : NDSolve on 2-D steady state heat eqn
    • MATLAB, Maple, Mathematica, LaTeX
Replies
1
Views
552
Mathematica Mathematica Interpolation function error
    • MATLAB, Maple, Mathematica, LaTeX
Replies
4
Views
892
Trouble with using the command WhenEvent in Mathematica
    • MATLAB, Maple, Mathematica, LaTeX
Replies
2
Views
700
Mathematica Mathematica - what is wrong with ImplicitRegion[]
    • MATLAB, Maple, Mathematica, LaTeX
Replies
1
Views
2K
Mathematica Implementation of tessarines in Mathematica
    • MATLAB, Maple, Mathematica, LaTeX
Replies
1
Views
1K
Mathematica How can I save computations with multiple parameters in Mathematica?
    • MATLAB, Maple, Mathematica, LaTeX
Replies
1
Views
1K
Mathematica Plot a vector valued function in cylindrical coordinates
    • MATLAB, Maple, Mathematica, LaTeX
Replies
1
Views
889
Mathematica Coloring and legending issue
    • MATLAB, Maple, Mathematica, LaTeX
Replies
1
Views
417
Mathematica How to define such a simple function in Mathematica
    • MATLAB, Maple, Mathematica, LaTeX
Replies
4
Views
1K

Hot Threads

Recent Insights

Back
Top