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Results tagged with symbols
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user 46318
Mathematica symbols are the ultimate atoms of symbolic data. Every symbol has a unique name, exists in a certain Mathematica context or namespace, and can have a variety of types of values and attributes.
4
votes
How can i replace the symbols in a list?
a->b is a shortcut for Rule[a,b]. Therefore, what you have to do is to replace Ruleby Subtract. E.g.:
SeedRandom[1]
list = Thread[{a, b, c, d, e} -> RandomInteger[100, 5]]
(* {a -> 80, b -> 14, c -> …
- 56.4k
1
vote
How to set a value to the symbol denoted by a given string?
MMA evaluate arguments before feeding them to a function. Therefore, if Symbol[name] already has a value: value1
Evaluate[Symbol[name]] = value2
is equivalent to:
value1 = value2
what is an error.
T …
- 56.4k
1
vote
Accepted
What is the relationship between a list of symbols created by a specific name, and a express...
The evaluator will evaluate an expression until nothing changes any more. Consider some code that gives a recursion:
x = Table[Symbol["x"][i], {i, 1, 2}]
To begin, the right side is evaluated and giv …
- 56.4k
1
vote
How to generate unique symbols inside a module that can also be used for pattern names?
Do I misunderstand something, but it looks rather simple to get the coefficient and the exponent of x:
foo[pol_, x_Symbol] := Module[{c, poly},
cs = Reap[
pol /. a_ x^n_ :> (Sow[{a, n}];) /. ( …
- 56.4k
1
vote
Intercepting typos/misstyped symbols and automatically correcting them in the FrontEnd
Unfortunately, the function in $NewSymbol does not alter the input, therefore it can only give a warning.
But an easy and simpler solution is to define PRint[] and PRint[] to evaluate to the correct i …
- 56.4k
5
votes
Accepted
How to create a simple transformation function on lists using short form of ReplaceAll?
This is a bit tricky because you need to work with levels and "ReplaceAll" can not take a level. Instead you may use "Replace" with a level specification of {1}:
Clear["Global`*"]
seq = Sequence[z, y, …
- 56.4k