The system-variables tag has no wiki summary.
30
votes
5answers
563 views
Items known by CurrentValue
CurrentValue can be used to poll the state of numerous system values such as the mouse position. Its help page doesn't list all possible items, though. An item like ...
10
votes
4answers
202 views
How to change the variables Qi's to Ri's in one or two steps
I was wondering if there is a command in Mathematica to change all the following Qi's to Ri's? For example, change Q1 to R1, Q2 to R2, etc.
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9
votes
1answer
348 views
Where can I permanently modify $Path?
I've quite forgotten: what file does one modify in order to add directories to $Path globally? Specifically, I want to include ...
9
votes
1answer
138 views
Why do DateList, DateString, and AstronomicalData ignore $TimeZone?
My reading of the documentation for DateList and DateString lead me to believe that both functions use ...
3
votes
1answer
129 views
How to restrict global variables to within a given notebook? [duplicate]
Possible Duplicate:
Is there a way to separate variables between multiple notebooks?
I assigned a global variable like a=10; It works in all my ...
2
votes
1answer
66 views
Is it safe to change the value of $TimeZone?
I'd like to configure some of my notebooks to assume all calculations using dates, times and locations (notably AstronomicalData , but others too) take place at the ...
1
vote
1answer
72 views
Strange setting in FormatValues[MakeExpression]
My sytem is: 8.0 for Mac OS X x86 (64-bit) (October 5, 2011)
When I start Mathematica and call
FormatValues[MakeExpression]
I get the following output:
...
0
votes
1answer
97 views
Solving a differential equation for a variable in a function
This may sound like a very trivial question, but I need to solve a differential equation as follows:
...
0
votes
1answer
105 views
How to understand and use DSolve solution
This equation is simple to DSolve in Mathematica, but I don't know how to use and understand solution.
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0
votes
0answers
55 views
Exposing a variable [closed]
This is the basic equation
\[Sigma][T]=E^((-20.7302 + 0.0147986 T) x) (625.646 - 3.50008 T) x^(
1.03651 - 0.000739932 T)
Then there are commands:
...
