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builtin_grey

r::interpreter::builtins::graphics::color

Function builtin_grey 

Source 
fn builtin_grey(
    args: &[RValue],
    named: &[(String, RValue)],
) -> Result<RValue, RError>
Expand description

Convert grey levels to hex color strings.

Vectorized: accepts a numeric vector of levels in [0,1] where 0=black, 1=white.

@param level numeric vector of grey levels in [0,1] @param alpha optional transparency in [0,1] (default 1, fully opaque) @return character vector of hex color strings