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@antv/dw-analyzer
Advanced tools
npm install @antv/dw-analyzer -S
or
yarn add @antv/dw-analyzer -S
Field Type is one of string
, float
, integer
, boolean
, date
, null
.
import { type } from '@antv/dw-analyzer';
const data = [1, 2, 3, 4, 5];
const fieldInfo = type(data);
console.log(fieldInfo);
// {
// "count": 5, // rows
// "distinct": 5,
// "type": "integer",
// "recommendation": "integer",
// "missing": 0,
// "samples": [ 1, 2, ... ],
// "valueMap": { "1": 1, "2": 1, "3": 1, "4": 1, "5": 1 },
// "minimum": 1,
// "maximum": 5,
// "mean": 3,
// "percentile5": 1,
// "percentile25": 2,
// "percentile50": 3,
// "percentile75": 4,
// "percentile95": 5,
// "sum": 15,
// "stdev": 1.4142135623730951,
// "variance": 2,
// "zeros": 0
// }
import { typeAll, isUnique } from '@antv/dw-analyzer';
const data = [
{ x: 1, y: 1, z: 1 },
{ x: 2, y: 4, z: 4 },
{ x: 3, y: 6, z: 9 },
{ x: 4, y: 8, z: 16 },
{ x: 5, y: 10, z: 25 },
];
const fieldInfo = typeAll(data);
console.log(isUnique(info.fields.x));
// true
console.log(fieldInfo);
// {
// "fields": [
// {
// "count": 5,
// "distinct": 5,
// "type": "integer",
// "recommendation": "integer",
// "missing": 0,
// "samples": [ 1, 2, ... ],
// "valueMap": { "1": 1, "2": 1, "3": 1, "4": 1, "5": 1 },
// "minimum": 1,
// "maximum": 5,
// "mean": 3,
// "percentile5": 1,
// "percentile25": 2,
// "percentile50": 3,
// "percentile75": 4,
// "percentile95": 5,
// "sum": 15,
// "stdev": 1.4142135623730951,
// "variance": 2,
// "zeros": 0,
// "name": "x"
// },
// ....
// ],
// "pearson": [ // Pearson correlation coefficient
// [ "x", "y", 0.9958932064677043 ],
// [ "x", "z", 0.9811049102515929 ],
// [ "y", "z", 0.9622715374524 ]
// ]
// }
if just two distinct value in a field, it would be a boolean
field
import { type } from '@antv/dw-analyzer';
const data = ['Y', 'N', 'Y', 'N'];
const fieldInfo = type(data);
// {
// "count": 4,
// "distinct": 2,
// "type": "boolean",
// "recommendation": "boolean",
// "missing": 0,
// "samples": [ "Y", "N", "Y", "N" ],
// "valueMap": {
// "Y": 2,
// "N": 2
// }
// }
import { type, isUnique } from '@antv/dw-analyzer';
const data = ['A', 'B', '', 'D', 'EAT'];
const fieldInfo = type(data);
console.log(isUnique(fieldInfo));
// false because of the empty value
console.log(fieldInfo);
// {
// "count": 5,
// "distinct": 4,
// "type": "string",
// "recommendation": "string",
// "missing": 1,
// "samples": [ "A", "B", "", "D", "EAT" ],
// "valueMap": {
// "A": 1,
// "B": 1,
// "null": 1,
// "D": 1,
// "EAT": 1
// },
// "maxLength": 3,
// "minLength": 1,
// "meanLength": 1.5,
// "containsChars": true,
// "containsDigits": false,
// "containsSpace": false,
// "containsNonWorlds": false
// }
Support ISO date format
import { type } from '@antv/dw-analyzer';
const data = ['2019-01-01', '2018-01-01', '2017-01-01', '2016-01-01', '2015-01-01'];
const fieldInfo = type(data);
console.log(fieldInfo);
// {
// "count": 5,
// "distinct": 5,
// "type": "date",
// "recommendation": "date",
// "missing": 0,
// "samples": [ "2019-01-01", "2018-01-01", "2017-01-01", "2016-01-01", "2015-01-01" ],
// "valueMap": {
// "2019-01-01": 1,
// "2018-01-01": 1,
// "2017-01-01": 1,
// "2016-01-01": 1,
// "2015-01-01": 1
// },
// "minimum": 1420070400000, // timestampe
// "maximum": 1546300800000
// }
FAQs
We found that @antv/dw-analyzer demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 38 open source maintainers collaborating on the project.
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