The map tag has no wiki summary.
23
votes
12answers
812 views
Map a function across a list conditionally
It seems that this is a really basic question, and I feel that the answer should be obvious to me. However, I am not seeing. Can you please help me? Thanks.
Suppose I have a list of data ...
7
votes
3answers
240 views
how to efficiently apply function to all pairs of a set (and collect the results)
To build a graph, I need to apply a function f[a_, b_] to all pairs of a list (3500 elements). The function itself returns a link ...
1
vote
2answers
142 views
Thread over a nested list top to bottom until non-list elements are found
I have a nested list:
list = {1, 2, {3, 4}, f[a], {2, h[b]}}
I would like to apply a function g to all elements of the ...
8
votes
4answers
289 views
What's fastest way of defining 10^5 down values?
I want to define
isGood[___] = False;
isGood[#] = True & /@ list
where list is a list of several million integers. ...
5
votes
2answers
117 views
Nested Map and Apply
There are some other questions on this topic but I could not get an answer from reading them. What I want to do is use Apply on some of the arguments of a function, ...
3
votes
3answers
110 views
Dynamic application of several polynomials
I know how to get the 'resulting image' (y) from the application of a certain function (f) (here represented as the coefficients of a polynomial) over a certain interval (x):
...
5
votes
3answers
137 views
How do I designate arguments in a nested map?
Say I have two lists,
list1 = {a, b, c}
list2 = {x, y, z}
and I want to map a function f over them to produce
...
