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D3
Bring your data to life.
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Published
d3-array
By
Mike Bostock
Edited
Aug 27, 2020
ISC
24 stars
Insert cell
Insert cell
Insert cell
function
*
randoms
(
n
)
{
for
(
let
i
=
0
;
i
<
n
;
++
i
)
{
yield
Math
.
random
(
)
;
}
}
Insert cell
Insert cell
d3
.
min
(
randoms
(
100
)
)
Insert cell
d3
.
sum
(
randoms
(
100
)
)
Insert cell
d3
.
extent
(
randoms
(
100
)
)
Insert cell
Insert cell
d3
.
min
(
new
Set
(
[
1
,
4
,
3
,
2
]
)
)
Insert cell
d3
.
min
(
new
Map
(
[
[
"foo"
,
10
]
,
[
"bar"
,
2
]
]
)
.
values
(
)
)
Insert cell
Insert cell
d3
.
cross
(
[
"small"
,
"large"
]
,
[
"caf"
,
"decaf"
]
,
[
"skim"
,
"whole"
,
"almond"
]
,
[
"latte"
,
"cappucino"
]
,
(
...
parts
)
=>
parts
.
join
(
" "
)
)
Insert cell
Insert cell
data
=
[
{
name
:
"jim"
,
amount
:
"34.0"
,
date
:
"11/12/2015"
}
,
{
name
:
"carl"
,
amount
:
"120.11"
,
date
:
"11/12/2015"
}
,
{
name
:
"stacy"
,
amount
:
"12.01"
,
date
:
"01/04/2016"
}
,
{
name
:
"stacy"
,
amount
:
"34.05"
,
date
:
"01/04/2016"
}
]
Insert cell
d3
.
group
(
data
,
d
=>
d
.
name
)
Insert cell
Insert cell
d3
.
group
(
data
,
d
=>
d
.
name
,
d
=>
d
.
date
)
Insert cell
Insert cell
d3
.
rollup
(
data
,
v
=>
v
.
length
,
d
=>
d
.
name
,
d
=>
d
.
date
)
Insert cell
d3
.
rollup
(
data
,
v
=>
d3
.
sum
(
v
,
d
=>
d
.
amount
)
,
d
=>
d
.
name
)
Insert cell
Insert cell
{
const
values
=
Float64Array
.
from
(
{
length
:
1e6
}
,
Math
.
random
)
;
const
i
=
values
.
length
>>
1
;
d3
.
quickselect
(
values
,
i
)
;
return
values
[
i
]
;
}
Insert cell
Insert cell
Insert cell
d3
=
require
(
"d3-array@2"
)
Insert cell
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Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.
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d3
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