ChartGL

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ChartGL leverages hardware acceleration to enable the visualization of very large datasets.

WebGL is used to access the graphics hardware on the local computer accelerating the rendering process by a factor of many thousand. In WebGL2 a combination of vertex shaders (position) and fragment shaders (color) are used to render data points providing the capability to display millions of data points in milliseconds.

Multiple large data sources can be plotted on the same chart with high speed and performance using layers.

Set up

Select a data source, available in Layers. ChartGL will best fit your data to the chart using a wild card selector in Y-Axis Data. Otherwise, select your data to plot for X-Axis Data and Y-Axis Data.
Format your X-axes and Y-axes; add axes labels with Titles.

Basics

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Hover: A View State Parameter which stores the X-axis value contingent on where the hover bar is on the chart; e.g. time or date.
Selected: A View State Parameter to store the X-axis value at the selected position; e.g time or date.
Animation Duration
Animation Easing: Define zoom animation and length of time in milliseconds to complete.; The Zoom feature enables the ability to zoom on a region within both x and y axis, or individually on each x or y axis. Double-Clicking the chart resets the chart to its initial state.

: The Pan feature enables the ability to pan along one axis at a time. To pan, click and drag from anywhere on the axis. Double-Clicking the chart resets the chart to its initial state.

Layers

Ability to display multiple different data sources on the same chart.

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Bubble/Line/Bar/Candlestick

Select either the "Bubble", "Line", "Bar" or "Candlestick" option for each layer.

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The "Bubble" option displays data as individual points, the "Line" option connects each data point resulting in a continuous line, the "Bar" option displays data as bars, and the "Candlestick" option displays data as candlesticks.

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Data Source

Data sources

Name

Name used as the chart legend label.

X-Axis Data

Y Axis Data

Select data columns to plot from the data source.

Y Axis includes a wildcard selection for multiple columns. Wildcard selection will use columns of the most common, single kdb type; for example, if a data set has one date type column, three integer type columns, and five float type columns - only the five float columns will be plotted using the wildcard, the integer and date columns will be ignored.

Regular expressions can also be used to define the y-axis.

When a wildcard or regular expression is used, the Color Palette defines point color for each added column.

Data Types

Only scalar data types can be used for X-Axis and Y-Axis.

X-Axis

Select from defined Axes.

Y-Axis

Select from defined Axes.

Open

High

Low

Close

Used only by Candlestick charts; select data columns which correspond to each.

Color

Select color for single plot (non-wildcard/regex) data sets.

Color Data

Select a data column to apply color. When a column is selected, the Color Palette defines point color for each unique value in the column.

Opacity

Define the opacity of the points from a value between 0 (transparent) and 100 (opaque).

Radius Data

Radius Scaling

If the layer type is Bubble, select from Data Source the variable to define which attribute to use for bubble scaling, then adjust the scaling variable to define bubble size.

Scale on Zoom

If the layer type is Bubble, increase bubble size on zoom.

Color

Select color for single plot (non-wildcard/regex) data sets.

Color Enumeration

Select a data column to apply color. When a column is selected, the Color Palette defines point color for each unique value in the column.

Opacity

Define the opacity of the points from a value between 0 (transparent) and 100 (opaque).

Icon

The icon selector allows for the choice of icons from a predetermined list if the layer type is Bubble.

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The icons are then displayed in the position of the data points on the chart.

Icons also support a base64 image in a view state parameter.

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Fill

Used if the layer type is Line

fill	description
`nofill`	No color fill
`Layer n`	For color fill between charted line and selected layer
`origin`	For color fill between chart line and X-axis

Fill Color

The color used for line fill

Fill Opacity

The opacity used for line fill

Fade to Transparent

Where a line fill color is employed, a transparency gradient will be applied to the layer

Bar Percentage

Defines bar width as a percentage of its range when Bar Percentage is selected under Bar Width Type.

Bar Fixed Width

Defines bar width as a fixed value when Fixed Width is selected under Bar Width Type.

Bar Width Type

Dropdown select between Bar Percentage and Fixed Width.

Legend Group

Dropdown to assign the layer legend to a Legend Group

Legend Enabled

Toggles display of data legend.

Enabled

Toggles display of the data layer on the chart. Can be tied to a view state parameter.

Candlestick Format

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Bear Color: Set color for down day candles
Bull Color: Set color for up day candles
Neutral Color: Set color for flat days
Wick Color: Set color for candlestick wicks
Bar Percentage: Defines candlestick body width as a percentage of its range when Bar Percentage is selected under Bar Width Type.
Bar Fixed Width: Defines candlestick body width as a fixed value when Fixed Width is selected under Bar Width Type.
Bar Width Type: Dropdown select between Bar Percentage and Fixed Width.

Color Palette

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Sets plot point colors for wildcard/regex y-axis or color enumeration.

Actions

Highlight rules

Highlight Rules

X axes

X-Axis n

Add multiple x-axes.

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X-Axis Type: Choose between Linear or Category data.
Position: Position axis to the top or bottom of the chart.
Height: Height of the tick area of the x-axis in pixels.
Number of Ticks: Sets the number of ticks to display in the axis.

Range

Use Min/Max: Toggle use of Min and Max to build x-axis.
Min
Max: Define minimum and maximum values for x-axis.

Hard range

Charted data outside of the set Min and Max range will not be displayed. If all data falls outside the set range, the chart will be blank.
Selection Min
Selection Max: Pulls min and max x-axis values on a zoom select into assigned view state parameters.

Gridlines

OffsetGridLines: Check to align x-axis grid lines to mid-point between tick values.
GridLinesColor
GridLinesOpacity: Define visual style of x-axis grid lines; opacity has a value between 0 (transparent) and 100 (opaque).

Format

Hide Trailing Zeroes: Hide display of trailing zeroes in x-axis tick values.
Display: Toggle display of x-axis labels.
Begin at Zero: Axis data starts at zero.
Numeric Format: Select x-axis format between Number, Smart Number, Formatted Number.
Decimal Places: Set precision point for x-axis numeric label.
Font Size: Set tick font size in pixels.
Prefix
Suffix: Add text to the tick label; e.g. currency or percentage symbol.

Title

Display: Toggle display of x-axis label.
Label String: Define x-axes label text.
Font Size: Set label font size in pixels.

Y axes

Y-Axis n

Add multiple y-axes.

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Y-Axis Type: Choose between Linear or Category data.
Position: Position axis to the left or right of the chart.
Width: Width of the tick area of the y-axis in pixels.
Number of Ticks: Sets the number of ticks to display in the axis.

Range

Use Min/Max: Toggle use of Min and Max to build y-axis.
Min
Max: Define minimum and maximum values for y-axis

Hard range

Charted data outside of the set Min and Max range will not be displayed. If all data falls outside the set range, the chart will be blank.
Selection Min
Selection Max: Pulls min and max y-axis values on a zoom select into assigned view state parameters.

Gridlines

OffsetGridLines: Check to align y-axis grid lines to mid-point between tick values.
GridLinesColor
GridLinesOpacity: Define visual style of y-axis grid lines; opacity has a value between 0 (transparent) and 100 (opaque).

Format

Hide Trailing Zeroes: Hide display of trailing zeroes in y-axis tick values.
Display: Toggle display of y-axis labels.
Begin at Zero: Axis data starts at zero.
Numeric Format: Select y-axis format between Number, Smart Number, Formatted Number.
Decimal Places: Set precision point for y-axis numeric label.
Font Size: Set tick font size in pixels.
Prefix
Suffix: Add text to the tick label; e.g. currency or percentage symbol.

Title

Display: Toggle display of y-axis label.
Label String: Define y-axis label text.
Font Size: Set label font size in pixels.

Overlay

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Show Crosshairs: Check to show crosshair on chart.
Show Coordinates: Check to show coordinates on chart.
Snap Crosshair to Data: If selected, crosshairs and coordinates will move to the nearest valid point on hover.
Use custom tooltip: Enable custom tooltip.
Custom tooltip: Define tooltip; simple example:

<table>
    <thead>
        <tr>
            <th>{{this.0.xAxis}}</th>
            <th></th>
        </tr>
    </thead>
    {{#each this}}
    <tbody>
        <tr>
            <td width="{{width}}">
                <i class="{{icon}}" style="color:{{color}}; {{image}};"></i> {{name}}:
            </td>
            <td>{{yAxis}}</td>
        </tr>
        {{/each}}
    </tbody>
</table>

Templates

Show all data points: Displays all y-axis values for selected point on the x-axis.
Group tooltip by layer: Use when Show all data points is enabled; displays data points in a distinct column for each Layer instead of a continuous list.

Legend

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Position: Define legend position: bottom,top,left, or right.

Legend Groups

Add new Legend Group. To enable, add a Legend Group item here and update the Legend Group value in at least one Layer

ChartGL

Set up

Basics

Layers

Candlestick Format

Color Palette

Actions

Highlight rules

X axes

X-Axis n

Range

Gridlines

Format

Title

Y axes

Y-Axis n

Range

Gridlines

Format

Title

Overlay

Legend

Legend Groups

File export

Style, Margins, Format