Min and Max of a list of Associations
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1
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I am trying to find the minimum values for all elements in a list of associations, below is an example
x = {<|"a"-> 4, "b"->9, "c"->15|>, <|"a"->21, "b"->11, "c"->1|>, <|"a"->12, "b"->3, "c"->21|>}
Required output for Min
{<|"a"-> 2, "b"->3, "c"->1|>}
Required output for Max
{<|"a"-> 21, "b"->11, "c"->15|>}
My attempt
for Max: MaximalBy[Values]@x
Result: {<|"a" -> 21, "b" -> 11, "c" -> 1|>}
for Min: MinimalBy[Values]@x
Result: {<|"a" -> 4, "b" -> 9, "c" -> 15|>}
Is there an elegant way to achieve this result?
list-manipulation associations
New contributor
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up vote
1
down vote
favorite
I am trying to find the minimum values for all elements in a list of associations, below is an example
x = {<|"a"-> 4, "b"->9, "c"->15|>, <|"a"->21, "b"->11, "c"->1|>, <|"a"->12, "b"->3, "c"->21|>}
Required output for Min
{<|"a"-> 2, "b"->3, "c"->1|>}
Required output for Max
{<|"a"-> 21, "b"->11, "c"->15|>}
My attempt
for Max: MaximalBy[Values]@x
Result: {<|"a" -> 21, "b" -> 11, "c" -> 1|>}
for Min: MinimalBy[Values]@x
Result: {<|"a" -> 4, "b" -> 9, "c" -> 15|>}
Is there an elegant way to achieve this result?
list-manipulation associations
New contributor
1
I don't get it. How is the keya
getting the value2
? That value does not appear fora
in any of the associations. Similarly, why is the value ofc
not equal to21
in the maximal result?
– Shredderroy
47 mins ago
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
I am trying to find the minimum values for all elements in a list of associations, below is an example
x = {<|"a"-> 4, "b"->9, "c"->15|>, <|"a"->21, "b"->11, "c"->1|>, <|"a"->12, "b"->3, "c"->21|>}
Required output for Min
{<|"a"-> 2, "b"->3, "c"->1|>}
Required output for Max
{<|"a"-> 21, "b"->11, "c"->15|>}
My attempt
for Max: MaximalBy[Values]@x
Result: {<|"a" -> 21, "b" -> 11, "c" -> 1|>}
for Min: MinimalBy[Values]@x
Result: {<|"a" -> 4, "b" -> 9, "c" -> 15|>}
Is there an elegant way to achieve this result?
list-manipulation associations
New contributor
I am trying to find the minimum values for all elements in a list of associations, below is an example
x = {<|"a"-> 4, "b"->9, "c"->15|>, <|"a"->21, "b"->11, "c"->1|>, <|"a"->12, "b"->3, "c"->21|>}
Required output for Min
{<|"a"-> 2, "b"->3, "c"->1|>}
Required output for Max
{<|"a"-> 21, "b"->11, "c"->15|>}
My attempt
for Max: MaximalBy[Values]@x
Result: {<|"a" -> 21, "b" -> 11, "c" -> 1|>}
for Min: MinimalBy[Values]@x
Result: {<|"a" -> 4, "b" -> 9, "c" -> 15|>}
Is there an elegant way to achieve this result?
list-manipulation associations
list-manipulation associations
New contributor
New contributor
edited 55 mins ago
C. E.
49.1k395197
49.1k395197
New contributor
asked 1 hour ago
Professor Williams
61
61
New contributor
New contributor
1
I don't get it. How is the keya
getting the value2
? That value does not appear fora
in any of the associations. Similarly, why is the value ofc
not equal to21
in the maximal result?
– Shredderroy
47 mins ago
add a comment |
1
I don't get it. How is the keya
getting the value2
? That value does not appear fora
in any of the associations. Similarly, why is the value ofc
not equal to21
in the maximal result?
– Shredderroy
47 mins ago
1
1
I don't get it. How is the key
a
getting the value 2
? That value does not appear for a
in any of the associations. Similarly, why is the value of c
not equal to 21
in the maximal result?– Shredderroy
47 mins ago
I don't get it. How is the key
a
getting the value 2
? That value does not appear for a
in any of the associations. Similarly, why is the value of c
not equal to 21
in the maximal result?– Shredderroy
47 mins ago
add a comment |
2 Answers
2
active
oldest
votes
up vote
3
down vote
How about
a = {
<|"a" -> 4, "b" -> 9, "c" -> 15|>,
<|"a" -> 21, "b" -> 11, "c" -> 1|>,
<|"a" -> 12, "b" -> 3, "c" -> 21|>
};
Merge[a, Apply[Min]]
(*<|"a" -> 4, "b" -> 3, "c" -> 1|>*)
Merge[a, Apply[Max]]
(*<|"a" -> 21, "b" -> 11, "c" -> 21|>*)
You don't needApply
.
– Kuba♦
6 mins ago
add a comment |
up vote
1
down vote
Random`Private`MapThreadMin[x]
Random`Private`MapThreadMax[x]
<|"a" -> 4, "b" -> 3, "c" -> 1|>
<|"a" -> 21, "b" -> 11, "c" -> 21|>
add a comment |
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
How about
a = {
<|"a" -> 4, "b" -> 9, "c" -> 15|>,
<|"a" -> 21, "b" -> 11, "c" -> 1|>,
<|"a" -> 12, "b" -> 3, "c" -> 21|>
};
Merge[a, Apply[Min]]
(*<|"a" -> 4, "b" -> 3, "c" -> 1|>*)
Merge[a, Apply[Max]]
(*<|"a" -> 21, "b" -> 11, "c" -> 21|>*)
You don't needApply
.
– Kuba♦
6 mins ago
add a comment |
up vote
3
down vote
How about
a = {
<|"a" -> 4, "b" -> 9, "c" -> 15|>,
<|"a" -> 21, "b" -> 11, "c" -> 1|>,
<|"a" -> 12, "b" -> 3, "c" -> 21|>
};
Merge[a, Apply[Min]]
(*<|"a" -> 4, "b" -> 3, "c" -> 1|>*)
Merge[a, Apply[Max]]
(*<|"a" -> 21, "b" -> 11, "c" -> 21|>*)
You don't needApply
.
– Kuba♦
6 mins ago
add a comment |
up vote
3
down vote
up vote
3
down vote
How about
a = {
<|"a" -> 4, "b" -> 9, "c" -> 15|>,
<|"a" -> 21, "b" -> 11, "c" -> 1|>,
<|"a" -> 12, "b" -> 3, "c" -> 21|>
};
Merge[a, Apply[Min]]
(*<|"a" -> 4, "b" -> 3, "c" -> 1|>*)
Merge[a, Apply[Max]]
(*<|"a" -> 21, "b" -> 11, "c" -> 21|>*)
How about
a = {
<|"a" -> 4, "b" -> 9, "c" -> 15|>,
<|"a" -> 21, "b" -> 11, "c" -> 1|>,
<|"a" -> 12, "b" -> 3, "c" -> 21|>
};
Merge[a, Apply[Min]]
(*<|"a" -> 4, "b" -> 3, "c" -> 1|>*)
Merge[a, Apply[Max]]
(*<|"a" -> 21, "b" -> 11, "c" -> 21|>*)
answered 55 mins ago
Shredderroy
1,3231014
1,3231014
You don't needApply
.
– Kuba♦
6 mins ago
add a comment |
You don't needApply
.
– Kuba♦
6 mins ago
You don't need
Apply
.– Kuba♦
6 mins ago
You don't need
Apply
.– Kuba♦
6 mins ago
add a comment |
up vote
1
down vote
Random`Private`MapThreadMin[x]
Random`Private`MapThreadMax[x]
<|"a" -> 4, "b" -> 3, "c" -> 1|>
<|"a" -> 21, "b" -> 11, "c" -> 21|>
add a comment |
up vote
1
down vote
Random`Private`MapThreadMin[x]
Random`Private`MapThreadMax[x]
<|"a" -> 4, "b" -> 3, "c" -> 1|>
<|"a" -> 21, "b" -> 11, "c" -> 21|>
add a comment |
up vote
1
down vote
up vote
1
down vote
Random`Private`MapThreadMin[x]
Random`Private`MapThreadMax[x]
<|"a" -> 4, "b" -> 3, "c" -> 1|>
<|"a" -> 21, "b" -> 11, "c" -> 21|>
Random`Private`MapThreadMin[x]
Random`Private`MapThreadMax[x]
<|"a" -> 4, "b" -> 3, "c" -> 1|>
<|"a" -> 21, "b" -> 11, "c" -> 21|>
answered 44 mins ago
Henrik Schumacher
46.5k466133
46.5k466133
add a comment |
add a comment |
Professor Williams is a new contributor. Be nice, and check out our Code of Conduct.
Professor Williams is a new contributor. Be nice, and check out our Code of Conduct.
Professor Williams is a new contributor. Be nice, and check out our Code of Conduct.
Professor Williams is a new contributor. Be nice, and check out our Code of Conduct.
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1
I don't get it. How is the key
a
getting the value2
? That value does not appear fora
in any of the associations. Similarly, why is the value ofc
not equal to21
in the maximal result?– Shredderroy
47 mins ago