Questions tagged [system]
Questions on implementation details and how the parts of Mathematica are arranged or configured to work. Avoid this tag for issues that are confined to a specific operating system.
195
questions
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0
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69
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Mathematica file shows as a Matlab file
i downloaded a package but I'm having problem since the m-file shows as a Matlab code and not Mathematica code, can someone help how to fix this problem.
I'm using windows 11 Mathematica 14
i already ...
2
votes
0
answers
53
views
Why do notebooks by default put symbols in Global context where they can collide with all other notebooks?
This default setting can cause subtle and difficult to find problems, such as inconsistent or incorrect answers when symbols, variables or functions in different notebooks have the same name. I speak ...
- 31
2
votes
1
answer
95
views
Fitting data to a system of ODE using ParametricNDSolveValue
I am trying to create the following code to fit data to a system of ODE.
...
- 51
2
votes
2
answers
123
views
Does the kernel attempt to evaluate the output of RandomReal?
I am trying to get my head around the evaluation process. One of the general ideas is that whenever an expression is replaced by another the evaluation restarts in the new expression. I can't imagine ...
- 669
-1
votes
2
answers
153
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Is it possible to pass by reference at the system level?
I am reformulating the question since it was apparently unclear. One of the comments made me find the correct programming language "syntax" for what I wanted to do(Thanks Nasser).
In this ...
- 669
0
votes
1
answer
145
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How to solve and analyze a system of 15 equations with 15 variables?
I have a system of $15$ equations and $15$ key variables. Some of the equations are non-linear. Some constant variables in the equation can be equal to numbers to solve the system. I have to find a ...
- 1
5
votes
1
answer
235
views
List of built-in functions written in Wolfram Language
I was developing a program and noted that Grad[0,{x,y,..}] was taking too much time to return zero vector (I do this many times, so the performance matters to me). ...
- 669
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votes
0
answers
60
views
Is it possible to do something automatically before opening .nb?
Is it possible to do something before opening .nb ?
I mean,
When the Mathematica kernel(?) receives a command to open the .nb,
...
- 4,325
1
vote
1
answer
177
views
Put tiny, hidden information on notebook
What is the standard method for inserting tiny, hidden information on notebooks (.nb files) ?
From now on, I am planning to insert small, hidden information on every new notebook. And also for some ...
- 4,325
2
votes
1
answer
94
views
Distinguish .nb that has been saved from new .nb
There may be many ways to distinguish .nb that has been saved from new .nb
I found that in NotebookInformation[] may be useful.
...
- 4,325
1
vote
0
answers
113
views
Save as custom folder in menu bar in 1 step
I found the solution for myself.
For some reasons I decided to write the updated content(=solution) at the top. One important reason is.. that you almost don't need to read after the solution.
...
- 4,325
0
votes
1
answer
105
views
Command to press a button
Under normal circumstances, giving a command to
press the Button
is stupid. Because we only need to execute the button action of that ...
- 4,325
0
votes
0
answers
42
views
Button with a certain built-in function makes error [duplicate]
Note that if I execute
NotebookSave[InputNotebook[],
SystemDialogInput["FileSave", "C:\\myfile.nb"]]
will popup ...
- 4,325
0
votes
0
answers
58
views
Modify save as.. in the menubar (by editing MenuSetup.tr) [duplicate]
I use mathematica V 14.0.0.
Is it possible to modify the behavior of Save as.. in the menubar?
That is, I want to change the initial full path. We see a window ...
- 4,325
2
votes
1
answer
111
views
Button : interactive save as + custom initial path
Is it possible to create a button
whose action is
"save as... in menu bar" with custom initial full path.
(custom initial full path is specified by user.)
Note that if you click ...
- 4,325
0
votes
0
answers
53
views
Open multiple instances(=windows) of same .nb? [duplicate]
Is it possible to open multiple instances of the same .nb (on local disk)?
First, open c:\test1\test1.nb.
After that, can you open another instance(=window) of <...
- 4,325
1
vote
2
answers
167
views
Change default save path/location of an .nb by code
If I open
c:\test1\test1.nb
and click
Mathematica MenuBar - File - Save as...
then a window for Save as... pops up, and the default save path is
...
- 4,325
1
vote
0
answers
59
views
Initialization Cell evaluation warning : turned off but still [closed]
I have a two .nb files, MyStart.nb and MyDoing.nb in c:\testfolder.
My intention is that if ...
- 4,325
1
vote
0
answers
59
views
Run something as soon as the notebook is open
I want to create a .nb file, say DoSomethingAsSoonAsOpen.nb, such that
in any case as soon as DoSomethingAsSoonAsOpen.nb file is ...
- 4,325
4
votes
1
answer
163
views
How to solve a linear system with a close to zero eigenvalue?
The following is a small part of my research:
I got a 4 by 4 matrix $\mathbf{M}$ of rank 3:
...
- 205
1
vote
1
answer
78
views
How the function NDSolve works? [closed]
I am trying to numerically solve a system of ordinary differential equations.
...
1
vote
1
answer
51
views
Error in using the function NDSolve [closed]
I am trying to numerically solve a system of ordinary differential equations.
...
2
votes
1
answer
76
views
Exported function discovery with LibraryFunction
Many internal calls boil down to invocations like
LibraryFunction["path/to/library", "funcName" , ...]
I'm on a mac, so I can use the ...
- 3,986
1
vote
1
answer
165
views
How do you Solve a Simultaneous System of Recursions
Consider the following system of simultaneous recursions:
r[n] == s[n-1]
s[n-2] == r[n-3]
I am tring to solve this system (I have given a vastly simplified ...
0
votes
0
answers
55
views
Solving matrix system of ODE coupled to a non linear PDE (Reynolds)
I am trying to solve the following problem for $p$ (the pressure) between a piston skirt and a cylinder lining. This depends on the secondary motion of top and bottom of the piston skirt $e_t$ and $...
- 1
1
vote
0
answers
43
views
Problems when solving a system of PDEs with NDSolve
I am currently attempting to solve the following exercise question using NDSolve directly (ref.: Davis, M. E. (2013). Numerical methods and modeling for chemical engineers. Courier Corporation.).
...
- 11
7
votes
1
answer
133
views
Get All Discrete Univariate Distributions with Symbolic Parameters
I am trying to get all Discrete Univariate Distributions with symbolic arguments from any place in Wolfram Language system. For example this guide:
http://reference.wolfram.com/language/guide/...
- 73.5k
1
vote
0
answers
61
views
What is the orange color symbol in the new line? [duplicate]
In mathematica v 13.1 ,
If I type + key of my keyboard in a new cell, I see
What is it? Also if I type + twice in a new cell, ...
- 4,325
4
votes
1
answer
118
views
Notebook magnification - two independent values
It seems there are two independent, equally influential values those control mathematica notebook magnification.
Just like volume bars in a certain media player(program) and volume bar in tray bar(...
- 4,325
3
votes
1
answer
84
views
Parallel computing doesn't use my own settings
To differentiate the conjugate of a function,
I used such settings.
...
- 51
1
vote
1
answer
91
views
Use output of Solve as input of another instance of Solve. How to deal with list of rules
I am a complete novice with Mathematica. The last line of the code that I report is a system of equations I'd like to solve (and I am sure it admits a unique solution): (I don't know how I can convert ...
5
votes
0
answers
68
views
Why does Length[Names["System`*"]] give different values on Windows and Linux?
I was just curious about this.
Length[Names["System`*"]]
Gives slightly different value on Linux and Windows 10. I was wondering why that is as I have ...
- 149k
6
votes
1
answer
234
views
Documentation Search : google-like (pokygon -> polygon)
If you search for "pokygon" in google.com, then google automatically fix error, and searches for "polygon".
Like google.com, if you search for "pokygon" in mathematica (V ...
- 4,325
1
vote
0
answers
59
views
Entire process of "hyperlink of paclet" to "location of real file"?
Hyperlink[AAAAA, "paclet:ref/ModularInverse"]
AAAAA
If I click AAAAA, then a tutorial notebook for ModularInverse.nb ...
- 4,325
2
votes
1
answer
176
views
How do I know which kernel is handling which .nb file? [closed]
OS : window 10
Mathematica : v12.2
By my mistake, I opened another mathematica kernel, not knowing a kernel was already running.
I created a lot of .nb files and worked on them in another kernel,
...
- 4,325
0
votes
0
answers
23
views
Replacing System` definitions in a context whilst still maintaing acces to them [duplicate]
Given the system operator TensorContract I can define a new one, TensorContractLazy with the attribute ...
- 872
4
votes
4
answers
254
views
Quit the loop if encounter error message
First define length-component error (personal term) :
This is an error when we want to get n-th component of a list if n is bigger then the length of the list. For example, ...
- 4,325
1
vote
1
answer
88
views
Edit UnicodeCharacters.tr-File
I want to install a new package in Mathematica. If I understand the userguide right, I also have to edit the UnicodeCharacters.tr-File by another *.tr-File for example containing
0x2219 [...
- 11
1
vote
0
answers
80
views
Error message window upon launching Mathematica
Upon launching Mathematica (v. 11.3) I always get the Messages window with "An unknown menu command token (RebuildHelpIndex)...", as shown below.
How do I eliminate that?
- 42.1k
1
vote
1
answer
50
views
Temporarily prevent/allow exporting to specific folders
Is it possible to temporarily
Q1) prevent exporting to specific folders ?
Q2) allow exporting to only specific folders ?
Whenever mathematica is about to process ...
- 4,325
2
votes
2
answers
385
views
Reduce and Solve are taking forever
I am running the following script to solve a system of equations. However, it has been running for 12 hours by now with no output. Is this typical? What is happening? Is there anything wrong with how ...
- 309
0
votes
1
answer
101
views
How to use Reduce to solve matrix/vector equation
Suppose $A$ is an $2 \times 2$ matrix of unknowns, and $x$ is an $2 \times 1$ vector of unknowns. How can I use $A$ and $x$ as variables to be solved for in Reduce or FindInstance?
example given a ...
- 309
0
votes
1
answer
90
views
Solving complicated linear system [closed]
I have this system
and I would solve it with mathematica, I try with the instruction Solve but I have an error
Please help me.
- 1
2
votes
0
answers
77
views
Solving a system of four non-linear differential equation
Could someone help me with my problem? I've been scratching my head over this for a day now. I can't write the right code to solve this non-linear differential equation system:
...
- 21
4
votes
2
answers
503
views
Multiplication of one big integer and a long list of integers - fast
This is an example of multiplying a big integer to a list of integers.
...
- 4,325
0
votes
0
answers
120
views
Plot a system of differential equations
I would like to plot the solutions to the system of ODEs that is written below:
...
- 101
2
votes
0
answers
99
views
Read Mac Touch ID In Mathematica
Apple seems to provide some support for developers to authenticate users biometrically with the touch id sensor in the form of a swift API
(see here). I'm wondering if there is an easy way to do this ...
- 829
3
votes
3
answers
286
views
2
votes
1
answer
169
views
System of PDE with integration conditions interior of domain
I am trying to solve this system of pde numerically. I am unable to find any method in Mathematica that can handle this problem. The issue is having this integration condition in the domain. I tried ...
- 113
3
votes
0
answers
135
views
System`Private`*Entry* and *Valid*, or: How does Mathematica know which expression is which?
Goal
The answers to this question are intended to be a place to describe the behavior and mechanism of the undocumented functions of the form System`Private`*Entry* ...
- 9,040