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Eric Field
Building and Using Tools to See. UVA Architecture + Data Science. IT Director. Instructor.
Workspace
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Published
the Basics
By
Eric Field
Edited
Feb 7, 2022
1 star
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<
div
id
=
"mosaic"
>
</
div
>
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count
=
200
// change this number and hit Run Cell >
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<
style
>
#
mosaic
{
line-height
:
0
}
#
mosaic
div
{
width
:
20
px
;
height
:
20
px
;
display
:
inline-block
;
}
</
style
>
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randColor
=
(
)
=>
{
let
r
=
Math
.
random
(
)
*
255
;
let
g
=
Math
.
random
(
)
*
255
;
let
b
=
Math
.
random
(
)
*
255
;
return
"rgb("
+
r
+
","
+
g
+
","
+
b
+
")"
;
}
Insert cell
boxes
=
d3
.
select
(
mosaic
)
.
selectAll
(
"div"
)
.
data
(
d3
.
range
(
count
)
)
.
join
(
"div"
)
.
style
(
"background-color"
,
randColor
)
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<
svg
id
=
"randcircles"
width
=
"400"
height
=
"400"
>
</
svg
>
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randLocation
=
(
)
=>
Math
.
random
(
)
*
400
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circles
=
d3
.
select
(
randcircles
)
.
selectAll
(
"circle"
)
.
data
(
d3
.
range
(
count
)
)
.
join
(
"circle"
)
.
attr
(
"cx"
,
randLocation
)
.
attr
(
"cy"
,
randLocation
)
.
attr
(
"r"
,
12
)
.
style
(
"fill"
,
"yellow"
)
.
style
(
"stroke"
,
"black"
)
.
style
(
"opacity"
,
0.7
)
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Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
Try it for free
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mosaic
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count
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randColor
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boxes
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randcircles
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randLocation
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circles
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