Applying a function to a nested listNested List ProductExtract function argumentsCreating a simple function...
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Applying a function to a nested list
Nested List ProductExtract function argumentsCreating a simple function to compute the average of the difference between pairs of elements in an arraySorting non-numerical listsExtract part of list by reading it in a cyclic mannerApplying a function along the desired dimensions of a n-dimensional arrayManipulating Elements in a Triple-Nested ListApplying function to all elements of the list of listApplying a function to a list of symbolic ratiosApplying a function to a list (compounding)
$begingroup$
Say I have a list:
l = {{{a, b}, c}, d}
I now want to apply a function, call it F
to that list in a way that I go from the lowest to highest level, i.e.
F[{F[{F[{a,b}], c}] , d}]
Is there a function in Mathematica which does exactly that?
list-manipulation functions
$endgroup$
add a comment |
$begingroup$
Say I have a list:
l = {{{a, b}, c}, d}
I now want to apply a function, call it F
to that list in a way that I go from the lowest to highest level, i.e.
F[{F[{F[{a,b}], c}] , d}]
Is there a function in Mathematica which does exactly that?
list-manipulation functions
$endgroup$
4
$begingroup$
Why does the order ford
andc
change, and not fora
andb
?
$endgroup$
– Carl Woll
4 hours ago
$begingroup$
My mistake, thank you for spotting that. I edited it.
$endgroup$
– amator2357
4 hours ago
add a comment |
$begingroup$
Say I have a list:
l = {{{a, b}, c}, d}
I now want to apply a function, call it F
to that list in a way that I go from the lowest to highest level, i.e.
F[{F[{F[{a,b}], c}] , d}]
Is there a function in Mathematica which does exactly that?
list-manipulation functions
$endgroup$
Say I have a list:
l = {{{a, b}, c}, d}
I now want to apply a function, call it F
to that list in a way that I go from the lowest to highest level, i.e.
F[{F[{F[{a,b}], c}] , d}]
Is there a function in Mathematica which does exactly that?
list-manipulation functions
list-manipulation functions
edited 4 hours ago
amator2357
asked 5 hours ago
amator2357amator2357
4538
4538
4
$begingroup$
Why does the order ford
andc
change, and not fora
andb
?
$endgroup$
– Carl Woll
4 hours ago
$begingroup$
My mistake, thank you for spotting that. I edited it.
$endgroup$
– amator2357
4 hours ago
add a comment |
4
$begingroup$
Why does the order ford
andc
change, and not fora
andb
?
$endgroup$
– Carl Woll
4 hours ago
$begingroup$
My mistake, thank you for spotting that. I edited it.
$endgroup$
– amator2357
4 hours ago
4
4
$begingroup$
Why does the order for
d
and c
change, and not for a
and b
?$endgroup$
– Carl Woll
4 hours ago
$begingroup$
Why does the order for
d
and c
change, and not for a
and b
?$endgroup$
– Carl Woll
4 hours ago
$begingroup$
My mistake, thank you for spotting that. I edited it.
$endgroup$
– amator2357
4 hours ago
$begingroup$
My mistake, thank you for spotting that. I edited it.
$endgroup$
– amator2357
4 hours ago
add a comment |
4 Answers
4
active
oldest
votes
$begingroup$
Replace[l, x_List :> F[x], All]
F[{F[{F[{a, b}], c}], d}]
Also
ClearAll[f]
f[Except[_List, x_]] := x;
MapAll[f, l]
f[{f[{f[{a, b}], c}], d}]
$endgroup$
add a comment |
$begingroup$
F@*Reverse@Map[F@*Reverse, l, -2]
F[{d, F[{c, F[{b, a}]}]}]
Fold[F[{#2, #1}] &, Flatten[l]]
F[{d, F[{c, F[{b, a}]}]}]
$endgroup$
$begingroup$
I think thatFlatten
works in this trivial case but it will not "find" the levels in a more complex situation
$endgroup$
– J42161217
4 hours ago
add a comment |
$begingroup$
Another possibility, if you want just lists to acquire the F
wrapper:
l /. List -> F@*List
F[{F[{F[{a, b}], c}], d}]
$endgroup$
add a comment |
$begingroup$
This works:
{{{a, b}, c}, d} //. {{s_?ListQ, t_?(Not@*ListQ)} :> {f[s], t}} // f
It's a bit hackish because of the separate invocation of f at the end, but it returns the desired result.
$endgroup$
add a comment |
Your Answer
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
Replace[l, x_List :> F[x], All]
F[{F[{F[{a, b}], c}], d}]
Also
ClearAll[f]
f[Except[_List, x_]] := x;
MapAll[f, l]
f[{f[{f[{a, b}], c}], d}]
$endgroup$
add a comment |
$begingroup$
Replace[l, x_List :> F[x], All]
F[{F[{F[{a, b}], c}], d}]
Also
ClearAll[f]
f[Except[_List, x_]] := x;
MapAll[f, l]
f[{f[{f[{a, b}], c}], d}]
$endgroup$
add a comment |
$begingroup$
Replace[l, x_List :> F[x], All]
F[{F[{F[{a, b}], c}], d}]
Also
ClearAll[f]
f[Except[_List, x_]] := x;
MapAll[f, l]
f[{f[{f[{a, b}], c}], d}]
$endgroup$
Replace[l, x_List :> F[x], All]
F[{F[{F[{a, b}], c}], d}]
Also
ClearAll[f]
f[Except[_List, x_]] := x;
MapAll[f, l]
f[{f[{f[{a, b}], c}], d}]
answered 3 hours ago
kglrkglr
190k10209427
190k10209427
add a comment |
add a comment |
$begingroup$
F@*Reverse@Map[F@*Reverse, l, -2]
F[{d, F[{c, F[{b, a}]}]}]
Fold[F[{#2, #1}] &, Flatten[l]]
F[{d, F[{c, F[{b, a}]}]}]
$endgroup$
$begingroup$
I think thatFlatten
works in this trivial case but it will not "find" the levels in a more complex situation
$endgroup$
– J42161217
4 hours ago
add a comment |
$begingroup$
F@*Reverse@Map[F@*Reverse, l, -2]
F[{d, F[{c, F[{b, a}]}]}]
Fold[F[{#2, #1}] &, Flatten[l]]
F[{d, F[{c, F[{b, a}]}]}]
$endgroup$
$begingroup$
I think thatFlatten
works in this trivial case but it will not "find" the levels in a more complex situation
$endgroup$
– J42161217
4 hours ago
add a comment |
$begingroup$
F@*Reverse@Map[F@*Reverse, l, -2]
F[{d, F[{c, F[{b, a}]}]}]
Fold[F[{#2, #1}] &, Flatten[l]]
F[{d, F[{c, F[{b, a}]}]}]
$endgroup$
F@*Reverse@Map[F@*Reverse, l, -2]
F[{d, F[{c, F[{b, a}]}]}]
Fold[F[{#2, #1}] &, Flatten[l]]
F[{d, F[{c, F[{b, a}]}]}]
answered 4 hours ago
Henrik SchumacherHenrik Schumacher
61.3k585171
61.3k585171
$begingroup$
I think thatFlatten
works in this trivial case but it will not "find" the levels in a more complex situation
$endgroup$
– J42161217
4 hours ago
add a comment |
$begingroup$
I think thatFlatten
works in this trivial case but it will not "find" the levels in a more complex situation
$endgroup$
– J42161217
4 hours ago
$begingroup$
I think that
Flatten
works in this trivial case but it will not "find" the levels in a more complex situation$endgroup$
– J42161217
4 hours ago
$begingroup$
I think that
Flatten
works in this trivial case but it will not "find" the levels in a more complex situation$endgroup$
– J42161217
4 hours ago
add a comment |
$begingroup$
Another possibility, if you want just lists to acquire the F
wrapper:
l /. List -> F@*List
F[{F[{F[{a, b}], c}], d}]
$endgroup$
add a comment |
$begingroup$
Another possibility, if you want just lists to acquire the F
wrapper:
l /. List -> F@*List
F[{F[{F[{a, b}], c}], d}]
$endgroup$
add a comment |
$begingroup$
Another possibility, if you want just lists to acquire the F
wrapper:
l /. List -> F@*List
F[{F[{F[{a, b}], c}], d}]
$endgroup$
Another possibility, if you want just lists to acquire the F
wrapper:
l /. List -> F@*List
F[{F[{F[{a, b}], c}], d}]
answered 2 hours ago
Carl WollCarl Woll
76.4k3100200
76.4k3100200
add a comment |
add a comment |
$begingroup$
This works:
{{{a, b}, c}, d} //. {{s_?ListQ, t_?(Not@*ListQ)} :> {f[s], t}} // f
It's a bit hackish because of the separate invocation of f at the end, but it returns the desired result.
$endgroup$
add a comment |
$begingroup$
This works:
{{{a, b}, c}, d} //. {{s_?ListQ, t_?(Not@*ListQ)} :> {f[s], t}} // f
It's a bit hackish because of the separate invocation of f at the end, but it returns the desired result.
$endgroup$
add a comment |
$begingroup$
This works:
{{{a, b}, c}, d} //. {{s_?ListQ, t_?(Not@*ListQ)} :> {f[s], t}} // f
It's a bit hackish because of the separate invocation of f at the end, but it returns the desired result.
$endgroup$
This works:
{{{a, b}, c}, d} //. {{s_?ListQ, t_?(Not@*ListQ)} :> {f[s], t}} // f
It's a bit hackish because of the separate invocation of f at the end, but it returns the desired result.
answered 3 hours ago
ShredderroyShredderroy
1,6101117
1,6101117
add a comment |
add a comment |
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4
$begingroup$
Why does the order for
d
andc
change, and not fora
andb
?$endgroup$
– Carl Woll
4 hours ago
$begingroup$
My mistake, thank you for spotting that. I edited it.
$endgroup$
– amator2357
4 hours ago