grSurfaceAddData (Function)

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Surface chart
Adding data into a chart

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grSurfaceAddData (Function)

In french: grSurfaceAjouteDonnée

Adds a data into a Surface chart.

Example

See additional examples

x, y, z are reals
wImage is Image

// Chargement de la photo en mémoire dans une variable de type Image
wImage = "couchersoleil.jpg" 


// Balayage de l'image et de tous les points
// pour déterminer le taux de luminosité du point
// à l'aide de la fonction CouleurLuminosité
FOR i = 1 _TO_ wImage.Width STEP 4
	FOR j = 1 _TO_ wImage.Height STEP 4
		x = i
		y = j
		z = ColorLightness(dPixelColor(wImage, x, y))
		grSurfaceAddData(GRF_Surface, x, y, z)
	END
END

// On dessine le graphe dans le champ Graphe
grDraw(GRF_Surface)

Syntax

grSurfaceAddData(<Chart name> , <X> , <Y> , <Z>)

<Chart name>: Control name or character string

Name of the chart to be used. This name corresponds to:
the name of the chart defined programmatically with grCreate.
the name of Chart control (found in the window editor or in the report editor).

<X>: Real

X-coordinate of the point to add.

<Y>: Real

Y-coordinate of the point to add.

<Z>: Real

Z coordinate of the point to add.

Remarks

Surface chart

For the data in a Surface chart, the XY plane constitutes the base of the surface while Z indicates the height of the point.

Adding data into a chart

grAddData is used to add data into a chart (pie, column, ...).

Depending on the type of chart, specific functions can also be used to add data:

For stock charts, it is recommended to use grStockAddData.
For Scatter charts, it is recommended to use grScatterAddDataXY.
For Heatmap charts, it is recommended to use grHMAddData.
For Sunburst charts, it is recommended to use grSunburstAddData.

Reminder: To add a value to a data item on a graph, use the grIncreaseData function.

Related Examples:

Training (WINDEV): WD Chart

[ + ] This example presents the different uses of the Chart control.
Different types of charts are presented:
- Pie
- Sunburst
- Line
- Scatter
- Column
- Area
- etc.

The main features presented here are the possibility to customize of charts from the code, as well as to fill the chart from an HFSQL data file, or in the editor.

Component: wd300grf.dll