All Questions
11
questions
6
votes
5
answers
734
views
Manipulating rules
I tried searching in the docs in "Transformation Rules and Definitions", however there wasn't anything of help.
So imagine I have these two rules:
...
- 377
1
vote
1
answer
75
views
How to distinguish x[a] from x in replacement rules? [closed]
Quick to the point:is there a way to make Mathematica assume that $a \neq a[1] \neq a[2] , ...$ I notice that Solve assumes that $a$ is the same for all $a[1],a[2],...$ Also, if I replace $a \...
- 95
1
vote
2
answers
72
views
Substituting values from an association thread into a table of expressions
I have asked a question here. Yet I am trying to do the same procedure with AssociationThread Suppose I have the following function which is a normal distribution:
<...
- 3,096
4
votes
4
answers
170
views
ReplaceList doesn't apply rules down to subparts
Somewhat related to a previous question, I'm experimenting with ReplaceList to get the list of all possible transformations we can obtain by applying a rule to an expression. But I don't manage to ...
- 1,529
2
votes
0
answers
140
views
General rule to rewrite function and argument into a new symbol
I am trying to convert Mathematica output into equations I can plug into C. I am presently trying to convert expressions of the form
Derivative[1,0,0][f][t,x,y]
...
1
vote
2
answers
230
views
Suppress arguments in output for pretty print
I would like to define a rule that suppress any arguments of a function for visibility.
I tried:
rule = f_[x__] -> f
While this works well with individual ...
- 1,523
2
votes
1
answer
49
views
Replace sub-expressions matching a pattern unless located under specific heads
Suppose I have some rule, e.g. Re[x_] :> (x + Conjugate[x])/2. I want to apply it to all matching sub-expressions in some expression, excluding any sub-...
- 7,273
1
vote
1
answer
757
views
Convert String in Expression to Integer
I have reviewed many string replacement Q&A but I have been unable to apply them to this case (MWE):
...
- 2,560
0
votes
1
answer
80
views
Converting indices to expression and back
lets say I want to convert this
Subscript[PSternMat, 2, 13]
into this
PSternMat$2$13
I have written this rule
...
- 650
17
votes
1
answer
324
views
When is the righthand side of a RuleDelayed evaluated?
The documentation on RuleDelayed states that lhs :> rhs represents a rule that transforms lhs to rhs, evaluating rhs only after the rule is used.
Consider the ...
- 10.2k
0
votes
1
answer
166
views
How to convert the expression '{a->a0, b->b0}' to the expression 'a=a0; b=b0'? [duplicate]
How to convert the expression '{a->a0, b->b0}' to the expression 'a=a0; b=b0'?
I think this is a common question and do not know if someone has asked it before. Any help or suggestion will be ...
- 1,145