Linked Questions

0 votes
2 answers
1k views

Converting a list of replacement rules into a list of real values [duplicate]

The following command outputs a list of replacement rules. ...
xaxXos's user avatar
  • 77
0 votes
1 answer
1k views

How do I assign the solutions of an equation to separate variables? [duplicate]

I'm a beginner to Mathematica. Here's my question. I'd like to store the output(s) of a Solve command to variable(s) that can be manipulated later. For example, I would like x1 and x2 to be the two ...
user31012's user avatar
549 votes
37 answers
130k views

What are the most common pitfalls awaiting new users?

As you may already know, Mathematica is a wonderful piece of software. However, it has a few characteristics that tend to confuse new (and sometimes not-so-new) users. That can be clearly seen from ...
7 votes
5 answers
955 views

Assigning the numerical results of Minimize to variables [closed]

I need to use the numerical values returned by Minimize in further computations. Consider, ...
adam's user avatar
  • 119
2 votes
1 answer
617 views

Transform a rule to a list of rules

How can this rule a -> {1, 2, 3} be transformed into this {a -> 1, a -> 2, a -> 3} by way of a function? ...
higgy's user avatar
  • 23
1 vote
3 answers
161 views

Manipulate strings within a list

Let's say I have Solve[x^4 + 3 == 0, x] with output ...
11drsnuggles11's user avatar
0 votes
2 answers
164 views

Plot function the uses Solve

Can someone tell me why I get an error (and how I get around it) from Solve while I try to Plot a function like: ...
PeMa's user avatar
  • 309
2 votes
2 answers
89 views

How to use quantities obtained by solving equations directly to plot

I want to know how we could use the quantities we found by solving simultaneous equations, directly into plotting graphs. For example I have this Mathematica code; it gives the values of ...
Ajib Paudel's user avatar
0 votes
1 answer
234 views

Error when solving equations constructed with Table [duplicate]

I have a couple of questions about the problem I am trying to solve ...
jengmge's user avatar
0 votes
0 answers
169 views

The /. syntax in numerical methods [duplicate]

I have an analytical approximation method for solving an ODE and want to compare this to an NDSolve solution, but the syntax is confusing me. To get the solution from NDSolve, I define the ODE as eqn ...
DRG's user avatar
  • 877
0 votes
0 answers
65 views

Use FindRoot solution as number in function [duplicate]

I would like to save a number that I gain with FindRoot so that I can use it in another function. I tried: ...
DaPhil's user avatar
  • 183