Important: This documentation is about an older version. It's relevant only to the release noted, many of the features and functions have been updated or replaced. Please view the current version.
MutableDataFrame class
Signature
export declare class MutableDataFrame<T = any> extends FunctionalVector<T> implements DataFrame, MutableVector<T> Import
import { MutableDataFrame } from '@grafana/data';Constructors
| Constructor | Modifiers | Description |
|---|---|---|
| constructor(source, creator) | Constructs a new instance of the MutableDataFrame class |
Properties
| Property | Modifiers | Type | Description |
|---|---|---|---|
| fields | MutableField[] | ||
| length | number | ||
| meta | QueryResultMeta | ||
| name | string | ||
| refId | string |
Methods
| Method | Modifiers | Description |
|---|---|---|
| add(value) | Add values from an object to corresponding fields. Similar to appendRow but does not create new fields. | |
| addField(f, startLength) | ||
| addFieldFor(value, name) | ||
| appendRow(row) | This will add each value to the corresponding column | |
| get(idx) | Get an object with a property for each field in the DataFrame | |
| reverse() | Reverse all values | |
| set(index, value) | ||
| toJSON() | The simplified JSON values used in JSON.stringify() | |
| validate() |
constructor(source, creator)
Constructs a new instance of the MutableDataFrame class
Signature
constructor(source?: DataFrame | DataFrameDTO, creator?: MutableVectorCreator);Parameters
| Parameter | Type | Description |
|---|---|---|
| source | DataFrame | DataFrameDTO | |
| creator | MutableVectorCreator |
fields property
Signature
fields: MutableField[];length property
Signature
get length(): number;meta property
Signature
meta?: QueryResultMeta;name property
Signature
name?: string;refId property
Signature
refId?: string;add method
Add values from an object to corresponding fields. Similar to appendRow but does not create new fields.
Signature
add(value: T): void;Parameters
| Parameter | Type | Description |
|---|---|---|
| value | T |
Returns:
void
addField method
Signature
addField(f: Field | FieldDTO, startLength?: number): MutableField;Parameters
| Parameter | Type | Description |
|---|---|---|
| f | Field | FieldDTO | |
| startLength | number |
Returns:
MutableField
addFieldFor method
Signature
addFieldFor(value: any, name?: string): MutableField;Parameters
| Parameter | Type | Description |
|---|---|---|
| value | any | |
| name | string |
Returns:
MutableField
appendRow method
This will add each value to the corresponding column
Signature
appendRow(row: any[]): void;Parameters
| Parameter | Type | Description |
|---|---|---|
| row | any[] |
Returns:
void
get method
Get an object with a property for each field in the DataFrame
Signature
get(idx: number): T;Parameters
| Parameter | Type | Description |
|---|---|---|
| idx | number |
Returns:
T
reverse method
Reverse all values
Signature
reverse(): void;Returns:
void
set method
Signature
set(index: number, value: T): void;Parameters
| Parameter | Type | Description |
|---|---|---|
| index | number | |
| value | T |
Returns:
void
toJSON method
The simplified JSON values used in JSON.stringify()
Signature
toJSON(): DataFrameDTO;Returns:
DataFrameDTO
validate method
Signature
validate(): void;Returns:
void
Was this page helpful?
Related resources from Grafana Labs
