Plotting and Finding Values in Mathematica: A Simple Question

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Discussion Overview

The discussion revolves around using Mathematica for plotting functions and finding specific values from those plots, particularly in the context of a numerical solution to a non-linear ordinary differential equation (ODE).

Discussion Character

  • Homework-related

Main Points Raised

  • One participant inquires about plotting the function ##y=x^2## in Mathematica and how to determine the value of ##y## when ##x=3##.
  • The same participant notes that their actual function is a numerical solution to a non-linear ODE, implying that the process may not be straightforward.
  • Subsequent posts indicate that the initial inquiry was resolved, but the participant did not specify the solution.
  • Another participant encourages sharing solutions for future reference, suggesting a collaborative approach to problem-solving.
  • A later post mentions that the participant needed to address a different issue, indicating a shift in focus.

Areas of Agreement / Disagreement

The discussion does not reach a consensus on the specific methods for plotting or finding values in Mathematica, as the initial question was resolved privately and no solutions were shared publicly.

Contextual Notes

The initial inquiry lacks detailed assumptions about the nature of the non-linear ODE or the specific methods used in Mathematica, which may affect the applicability of any proposed solutions.

Who May Find This Useful

Individuals interested in using Mathematica for plotting functions and evaluating expressions, particularly in the context of numerical solutions to differential equations.

member 428835
Hi PF!

If I'm trying to plot something in mathematica, say ##y=x^2## and then I want to find out what ##y## is when ##x=3##, how would I do this?

Thanks so much!

I should add, the function I'm inputting in is a numerical solution to a non-linear ODE, so it's not as easy as simply inputting ##3^2## in the above example.
 
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nevermind, I'm good!
 
Share your solutions for future reference!
 
Sorry, I actually needed to do something different, but I solved that.
 

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