F2Scale
The metric Scale is the conversion bridge from data space to graphics space, and is responsible for the mutual conversion of original data to values in the [0, 1] interval. There are different types of metrics for different data types.
Depending on the type of data, F2-Native supports the following measurement types:
Depending on the type of data, F2-Native supports the following measurement types:
| Type | Description |
|---|---|
| identity | The default measure, a value of constant type, that is, a field of the data is an invariant constant |
| linear | consecutive numbers [1, 2, 3, 4, 5] |
| cat | Category, ['Male','Female'] |
| timeCat | Time Type |
API
- (F2Chart * (^)(NSString *filed, NSDictionary *config))scale
set metric
iOS
F2CanvasView *f2CanvasView = [F2CanvasView canvas:CGRectMake(0, 0, 280, 280)];
F2Chart *chart = [F2Chart chart:f2CanvasView.bounds.size name:@"F2chart"];
chart.scale(@"date", @{@"type":@"identity" });
chart.scale(@"value", @{ @"precision": @(1), @"max": @(200), @"min": @(0)});Android
mChart.setScale("date", new F2Chart.ScaleConfigBuilder().tickCount(3).range(new double[]{0.1, 0.9}));
mChart.setScale("value", new F2Chart.ScaleConfigBuilder().precision(1).max(200).min(0));- parameters
| Attribute Name | Type | Explanation |
|---|---|---|
field | String | The name of the data in the source that the current measure needs to measure |
config | Dictionary | The specific configuration of the measurement is detailed in the following config |
-config
| Property Name | Type | Explanation | Default Value |
|---|---|---|---|
type | String | metric type identity linear cat timeCat | "identity" |
precision | Number | precision | - |
range | Array<Number> | Defines the range of metric values range[0] - defines the minimum value of the metric's value range range[1] - defines the maximum value of the metric's value range | Calculated according to actual data |
tickCount | Number | Defines the number of ticks | - |
max | Number | Defines the maximum value of the value | - |
min | Number | Defines the minimum value of the value | - |