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Confidence Band Base Color

 

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Determine the base color for confidence bands. YADA will use this color to create a spectrum of colors that are then used when displaying plots involving confidence bands. Confidence bands are displayed as patches in YADA, i.e., the region between the upper and lower band is filled with the same color.

Confidence bands are constructed using the percentiles specified in the data construction file. An example is provided in Table 2. If YADA finds an odd number of percentile values it will discard the middle value.

The default base color is white, i.e., [255 255 255] in the Red Green Blue (RGB) scale. YADA creates scale factors between 0 and 1 that depends on how many confidence regions it should display. Once  the scale factors have been computed it multiplies the base color by these numbers.

The scale factors are computed from a simple formula that depends on how many confidence regions to paint. for example, if you have selected 3 confidence regions (6 percentiles), the scale factors are 1/6 for the outer region, 3/6 for the middle region, and 5/6 for the inner region. This generally means that the inner region has a lighter color than the middle or the outer, and that the middle region is lighter than the outer.

NOTE: It is highly recommended that black is not used as base color. This color is [0 0 0] in the RGB scale. Hence, any number between 0 and 1 that you multiply which black is also black.

 

 


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