Linked Questions
29 questions linked to/from Functions vs. patterns
1
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Pure functions vs normal functions [duplicate]
I am trying to understand the true difference/usage of a pure function vs a "normal" function. Besides the argument that a pure function is particularly handy when it comes to a single usage, are ...
- 803
2
votes
1
answer
383
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Difference between function definitions [duplicate]
Possible Duplicate:
Functions vs. patterns
I thought about describing the context in which I faced this problem, but I figured it is general enough and clear enough to pose it as it is.
What is ...
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3
votes
1
answer
111
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Defined function takes more time than pure/anonymous function. Why? [duplicate]
A function defined by f[x_]:=<code> and applied on every element of a list as f /@ testList seems to take longer than the ...
- 321
1
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0
answers
52
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Pure OwnValue Functions vs Patterned DownValue Functions [duplicate]
Is it better to use pure Function assigned to symbols as their OwnValues vs function defined by patterns as symbol's ...
- 10.4k
608
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19
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161k
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Where can I find examples of good Mathematica programming practice?
I consider myself a pretty good Mathematica programmer, but I'm always looking out for ways to either improve my way of doing things in Mathematica, or to see if there's something nifty that I haven't ...
78
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4
answers
23k
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How do I save a variable or function definition to a file?
Is it possible to save a function which was created via Interpolation of some data in such a way that I can use this function in a new Mathematica session without ...
- 3,121
83
votes
3
answers
10k
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Metaprogramming in Mathematica
Being functional, and having no "quotation", i.e. essentially treating data and programs semantically same, Mathematica seems naturally capable of doing metaprogramming. But could anyone construct a ...
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56
votes
3
answers
2k
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Are there guidelines for avoiding the unpacking of a packed array?
Packed arrays are very useful because they save memory and generally allow speedier and more efficient calculation times. If a list of data currently stored as a packed array is unpacked, it can slow ...
- 34.5k
43
votes
4
answers
4k
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Compiling more functions that don't call MainEvaluate
I would like to use Compile with functions defined outside Compile.
For example if I have the two basic functions ...
- 11.1k
52
votes
2
answers
8k
views
Scan vs. Map vs. Apply
I cannot understand the difference between Apply, Scan, and Map.
I have tried to play with ...
- 3,936
57
votes
2
answers
3k
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How do you set attributes on SubValues?
SubValues, as discussed in a previous question, are declared as follows
...
- 34.3k
13
votes
4
answers
1k
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Assessing argument type in set delayed function definitions
I'm wondering how to properly assess the type of arguments passed to functions defined with :=. I want my functions to be the most efficient, unambiguous and clear ...
- 3,455
11
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4
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759
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When should I use Apply (or Function) and when @@ (or &)?
This is a rather general question, which I fail to answer myself. I guess it is mainly due to my insufficient knowledge of the precise terms.
If I understand correctly, the following are equivalent:
...
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20
votes
3
answers
2k
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How can I completely ban usage of some functions in output and mandate use of others?
For example, I hate that Mathematica uses Pochhammer symbol in outputs and prefer all the expressions in Gamma function. How can ...
- 3,862
8
votes
4
answers
16k
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Plotting a simple relationship with Plot[] results in empty graph
I've moved this question over from StackExchange to get better visibility (and deleted the old question).
I have a user-defined relationship I'd like to plot:
...
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