Hi All,
I am new to the visualization API, I see the following column types are
supported in the DataTable/DataView but I wonder why not array or map or
any other nested datatype? or put it another way should I replicate the row
if one my columns is an array datatype? for example
Approach #1
------------------
1, foo, [5,7,9]
2, bar, [3,6]
vs
Approach #2
-----------------
1, foo, 5
1, foo, 7
1, foo, 9
2, bar, 3
2, bar, 6
is Approach#2 easier for building charts or visualization perspective than
Approach#1? is that why arrays or maps or any other nested types are not
supported?
Thanks!
*cols Property*
cols is an array of objects describing the ID and type of each column. Each
property is an object with the following properties (case-sensitive):
- type [*Required*] Data type of the data in the column. Supports the
following string values (examples include the v: property, described later):
- 'boolean' - JavaScript boolean value ('true' or 'false'). *Example
value*: v:'true'
- 'number' - JavaScript number value. *Example values*: v:7 , v:3.14,
v:-55
- 'string' - JavaScript string value. *Example value*: v:'hello'
- 'date' - JavaScript Date object (zero-based month), with the time
truncated. *Example value*: v:new Date(2008, 0, 15)
- 'datetime' - JavaScript Date object including the time. *Example
value*: v:new Date(2008, 0, 15, 14, 30, 45)
- 'timeofday' - Array of three numbers and an optional fourth,
representing hour (0 indicates midnight), minute, second, and optional
millisecond. *Example values*: v:[8, 15, 0], v: [6, 12, 1, 144]
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