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
Related Grafana resources
Getting started with Grafana 8
Grafana 8.0 is here! Join us for a live walkthrough on how to get started using Grafana 8 and the Grafana 8 user interface while showing how to set up monitoring for a web service that uses Prometheus and Loki to store metrics and logs.
Unify your data with Grafana plugins: Splunk, MongoDB, Datadog, and more
Show how Grafana can be used to take data from multiple different sources and unify it, without disrupting the investments that are working today.
Demo: Getting started with Grafana Enterprise and observability
Join the Grafana Labs team for a 30-minute demo of how to get started with the Grafana Stack, so you can go from zero to observability in just a few minutes.
