All Questions
Tagged with functions pattern-matching
71 questions
1
vote
1
answer
104
views
Attribute based pre-processing of arguments
I work with hashes that can be related to various data structures.
I find it convenient to have my functions work either when a hash argument is provided or when the required data structure is ...
- 4,881
3
votes
3
answers
230
views
Function to find the most common numeric ordered pairings (value, count)
Let us say that I have a list of numeric ordered pairs where the first number represents a value to be counted and the second number represents the count of that value. The following is one way to ...
- 195
3
votes
1
answer
78
views
Function with complicated argument constraint with default value
I need to define a function, say f with an argument which is integer, positive and with a default value say 2. I tried:
...
- 733
5
votes
3
answers
698
views
Reversing the order of function arguments by a replacement rule
I am facing an issue when I try to reverse the arguments of a function in a replacement rule.
Let me give an example :
...
- 375
3
votes
1
answer
81
views
Troubles with BlankNullSequence in the case of multiplication
I have some trouble to use the triple underscore notation to use definitions with or without a term. Consider the following toy example
f[a___ x]:=1
{f[x],f[2x]}
...
- 375
2
votes
3
answers
186
views
Simplifying 'symbol-linear combinations' of nested monomials
I'm working with a custom binary 'operation' $F$ which takes $x, y$ and produces $F[x, y]$, where the possible arguments are already given by some list $\{ \text{one}, a, b, c, d, x, y, e, f\}$ where $...
- 65
3
votes
1
answer
169
views
Pattern matching vs. condition in a function
I'm trying to learn stuff from pattern matching but I found sometimes pattern matching does not work as I expected. Could anyone explain why the below outputs are not same? Thank you.
And could anyone ...
- 31
2
votes
1
answer
65
views
Is it possible to ask Mathematica to give/find this largest (absolute value) argument of $\cosh$ in the expression?
I have the expression exp in terms of Cosh functions:
...
- 195
1
vote
1
answer
81
views
Can not get OptionValue with SetDelayed variable
ClearAll[foo1];
foo1[OptionsPattern[]] := Hold[OptionValue[""]][[1, 1]]
foo1[]
gives function name
foo1
But
...
- 17.7k
1
vote
0
answers
79
views
3
votes
1
answer
253
views
Test whether an expression contains a particular pattern
How to test whether an expression contains a particular pattern ?
I made a function for myself that tests whether an expression contains Plus or not.
...
- 4,405
1
vote
1
answer
155
views
how to understand f[{1,2,3,4}]? [closed]
As far as my understanding of function in Mathematica, its core is pattern match, but why f[{a,b,c}] (when f is defined) can work correctly? in my understanding, <...
- 353
2
votes
1
answer
318
views
Can you use superscripts as variable and function names?
I want to express the following function:
$z^{(1)}=w^{(1)}a^{(0)}+b^{(1)}$
I have read in Mathematica documentation that Symbolize can be used to define variables ...
- 333
10
votes
3
answers
894
views
What is the best method to search pattern for 2D list?
What is the best method to search patterns for 2D list ?
Let L be following 2D-list :
...
- 4,405
4
votes
1
answer
104
views
Replacement, PatternTest, Module related Question
Let's see how MMA handles following type of expression :
Replace[L, {pattTest1->rhs1, pattTest2->rhs2, pattTest3->rhs3}, {1}]
Specific example :
...
- 4,405