How to use the @antv/scale/lib.identity function in @antv/scale
To help you get started, we’ve selected a few @antv/scale examples, based on popular ways it is used in public projects.
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antvis / G2 / src / chart / controller / scale.js View on Github 
createScale(field, data) {
const self = this;
const def = self._getDef(field);
let scale;
const validData = data || [];
const firstValue = Util.Array.firstValue(validData, field);
if (Util.isNumber(field) || (Util.isNil(firstValue)) && !def) {
scale = Scale.identity({
value: field,
field: field.toString(),
values: [ field ]
});
} else { // 如果已经定义过这个度量
let type;
if (def) {
type = def.type;
}
type = type || self._getDefaultType(field, validData);
const cfg = self._getScaleCfg(type, field, validData);
if (def) {
Util.mix(cfg, def);
}
scale = Scale[type](cfg);
}@antv/scale
Toolkit for mapping abstract data into visual representation.
