Questions tagged [system-variables]
The system-variables tag has no usage guidance.
9
questions with no upvoted or accepted answers
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204 views
Shared variables between notebooks using the same kernel not working in mathematica 10.1?
I am trying to access the variables over two Mathematica documents, this works fine when I use Mathematica 9 but when I attempt to do the same on 10.1 it doesn't work.
I have set both notebooks to ...
3
votes
0answers
84 views
Where can I find detailed information about the SystemOptions?
I'm looking to optimize my Mathematica script, and I'm willing to go spelunking with low-level system options.
The problem is that I've been looking in the Mathematica documentation, but there doesn'...
1
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0answers
107 views
NDSolve 2 functions 2 variables with intermediate calculation : (1 time-space eq) + (1 space eq)
I have a system of differential equation with this structure :
$$\left\{\begin{split}&\partial_t n(t,r) + \nabla. \big(n(t,r)v(t,r)\big)=0 \\ & f\Big(n(t,r),v(t,r),\partial_r n(t,r),\partial_r ...
1
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0answers
92 views
0
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44 views
0
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0answers
34 views
Is there a way to automatically store the output of a command to a variable directly?
Generally I do a computation then I have to manually take that number and make it equal to another variable which I define which I can then use to do subsequent computations. Something like this:
<...
0
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0answers
44 views
Set of multivarible expressions to be re-expressed a single variable
I have a set of expression such as $\frac{3x+y-z}{6x}$ and $\frac{3 x-y+z}{12 x}$, which can easily get re-expressed as $p$ and $(1-p)/2$, where $p=\frac{3x+y-z}{6x}$, but is there a way to find this $...
0
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0answers
29 views
Differential equations system's solutions differ when one of the constant is 0
I am solving the following system of equations with Mathematica.
$u'=-k_{1}ux+k_{2}x^2, x'=k_{1}ux-k_{2}x^2$
and I obtain the solution for x:
$x(t)=\frac{e^{k_{1}C_{1}(t+C_{2})}k_{1}C_{1}}{-1+e^{k_{1}...
0
votes
0answers
95 views
Minimize and Table of variables
I use a list of variables to Minimize a particular quantity
{ Q, val1, Table[Pi, {i, 1, m, 1}}
where i is the subscript of P. However in this way I have
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