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Data Visualization using D3 and Observable Plot
By
Sumant Pattanaik
Edited
Aug 20, 2021
2 stars
2
Data Visualization using D3 and Observable Plot
Subplot in Plot
Graph Layout
Sample US Wind Data Viz
WebGL Volume Rendering
D3: Introducing
D3 Class
(29)
Financial Data Fetch
Useful Javascript Array functions.
Data Input
Using Plot carto (plugin)
Introduction to Observable and Observable Plot
Plot: Intro
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url
=
"https://datahub.io/machine-learning/iris/r/iris.csv"
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fetch
(
url
)
.
then
(
response
=>
response
.
text
(
)
)
Insert cell
(
await
fetch
(
url
)
)
.
text
(
)
Insert cell
d3
.
text
(
url
)
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md
`#### Text Input from attached file`
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FileAttachment
(
"iris_csv.csv"
)
.
text
(
)
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md
`### CSV data input`
Insert cell
d3
.
csv
(
url
)
Insert cell
d3
.
csv
(
url
,
d3
.
autoType
)
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inputText
=
d3
.
text
(
url
)
// Or any other text file input method shown above
Insert cell
d3
.
csvParse
(
inputText
)
Insert cell
d3
.
csvParse
(
inputText
,
d3
.
autoType
)
Insert cell
md
`#### CSV data input from an attached file`
Insert cell
FileAttachment
(
"iris_csv.csv"
)
.
csv
(
{
typed
:
true
}
)
Insert cell
FileAttachment
(
"iris_csv.csv"
)
.
csv
(
{
typed
:
true
,
array
:
true
}
)
Insert cell
d3
.
csvParse
(
await
FileAttachment
(
"iris_csv.csv"
)
.
text
(
)
)
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xlsx
=
require
(
"xlsx"
)
Insert cell
md
`#### Reading a CSV file using xlsx library`
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ab
=
FileAttachment
(
"iris_csv.csv"
)
.
arrayBuffer
(
)
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wb
=
xlsx
.
read
(
ab
,
{
type
:
'array'
}
)
Insert cell
viewof
sheet_name
=
Inputs
.
select
(
wb
.
SheetNames
,
{
label
:
"Choose Sheet"
}
)
Insert cell
ws
=
wb
.
Sheets
[
sheet_name
]
Insert cell
xlsx
.
utils
.
sheet_to_json
(
ws
)
Insert cell
headers
=
Object
.
keys
(
xlsx
.
utils
.
sheet_to_json
(
ws
)
[
0
]
)
Insert cell
md
`#### Reading a sample Excel file using xlsx library
File source: https://dornsife.usc.edu › docs › ir211wk12sample`
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ab1
=
FileAttachment
(
"ir211wk12sample.xls"
)
.
arrayBuffer
(
)
Insert cell
wb1
=
xlsx
.
read
(
ab1
,
{
type
:
'array'
}
)
// wb1 = xlsx.read(new Uint8Array(ab1), { type: 'array' })
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viewof
sheet_name1
=
Inputs
.
select
(
wb1
.
SheetNames
,
{
label
:
"Choose Sheet"
}
)
Insert cell
ws1
=
wb1
.
Sheets
[
sheet_name1
]
Insert cell
xlsx
.
utils
.
sheet_to_json
(
ws1
)
Insert cell
Inputs
.
table
(
xlsx
.
utils
.
sheet_to_json
(
ws1
)
)
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import
{
soFetch
}
from
'@alecglassford/so-fetch'
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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
Learn more
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