Description Usage Arguments Details Value Examples
Convenience function to convert a vector of values into a color specification.
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x |
vector of numeric, character or factor values to be transformed |
opacity |
optional numeric value in the range 0.0 to 1.0 used to specify the opacity/transparency (alpha) of the colors to be returned. 0 means fully opaque, 1 means fully transparent. |
Behavior of as.color
is as follows:
integer numeric values: unchanged, (assumed to corespond to values of R's active palette
)
integer real values: will be translated to into grayscale values ranging between the max and min
factor: integer values corresponding to factor levels will be used
character: if values are valid colors (as determined by is.color
) they will be returned as is. Otherwise converted to factor and numeric value of factor returned.
The optional opacity
parameter can be used to make colors partially transparent (as a shortcut for adjustcolor
. If used, colors will be returned as hex rgb color string (i.e. "#00FF0080"
)
The is.color
function checks if each character element of x
appears to be a color name by comparing it to colors
and checking if it is an HTML-style hex color code. Note that it will return FALSE for integer values.
These functions are used for the color parameters of plot.network
.
For as.color
, a vector integer values (corresponding to color palette values) or character color name.
For is.color
, a logical vector indicating if each element of x appears to be a color
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