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32.7.14 Display/Colormaps...

The Display/Colormaps... menu item opens the Colormaps panel.



Colormaps Panel


The Colormaps panel allows you to select and modify existing colormaps. See Section  28.2.5 for details.

figure

Controls

Labels   allows you to customize the display of your colormap labels.

Show All   Enable this option if you want all the labels to show alongside the colormap. Disable if you want to skip some of the label displays.

Skip   sets the number of labels to be skipped.

Number Format   contains controls for changing the format of the labels on the color scale. These labels are the character strings used to define the color divisions at the left of the graphics window.

Type   sets the form of the labels. You may select from a drop-down list of options, including the following:
general   displays the real value with either float or exponential form based on the size of the number and the defined Precision.

float   displays the real value with an integral and fractional part (e.g., 1.0000), where the number of digits in the fractional part is determined by Precision.

exponential   displays the real value with a mantissa and exponent (e.g., 1.0e-02), where the number of digits in the fractional part of the mantissa is determined by Precision.

Precision   defines the number of fractional digits displayed in the labels.

Colormaps   contains controls for the colormap size and scale, and for selection of a defined colormap.

Log Scale   enables the use of a logarithmic scale for the color scale (rather than the default decimal scale). See Section  28.2.5 for details.

Colormap Size   specifies the number of distinct colors in the colormap. You may specify from 2 to 100 colors.

Currently Defined   contains a drop-down list of all pre-defined colormaps and all custom colormaps defined by you. Select the colormap to be used from this list.

Edit...   opens the Colormap Editor panel, in which you can create a custom colormap.



Colormap Editor Panel


The Colormap Editor panel allows you to create custom colormaps. See Section  28.2.5 for details about the items below.

figure

Controls

(The Drawing Area)   is used to interactively modify colormaps. You can use the notion of anchor points to interpolate linearly between two defined anchor points. The colors at the top of the panel allow you to preview the colormap that is being defined, The black bar and white squares below the colors allow you to set, delete, and modify anchor points.

Color   specifies color components for the currently selected anchor point.

RGB   enables the specification of colors based on their red, green, and blue components.

HSV   enables the specification of colors based on their hue, saturation, and value.

Red, Green, Blue   are scales with which you can specify the RGB components of the selected anchor color. These scales will appear when RGB is selected.

Hue, Saturation, Value   are scales with which you can specify the HSV components of the selected anchor color. These scales will appear when HSV is selected.

Colormaps   lists colormap names and the name of the colormap being edited.

Name   sets the name of the colormap being edited/selected. You can rename existing colormaps and provide names for new colormaps.

Currently Defined   contains a drop-down list of all pre-defined colormaps and all custom colormaps defined by you. You can select a colormap to be modified from this list.

Colormap Size   specifies the number of distinct colors in the colormap. You may specify from 2 to 100 colors.


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