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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

# Algorithms beginning with R

- radioactive_decay [edit] v0.1
*Calculate the typical percentage of atoms in a radioactive substance that have decayed by a given time.* - radtodeg [edit] v0.1
*Returns radians converted to degrees.* - raise_polygon [edit] v0.1
*Project a flat polygon into three dimensions.* - random_list [edit] v0.1
*Returns a list containing the values between start and end, but in random order.* - random_name_caption [edit] v0.3
*Use a callback to print your name on an image repeatedly.* - random_usort [edit] v0.2
*Callback that can be used in the PHP function usort. It can be used to randomly sort.* - rand_alpha [edit] v1.0
*Get a random English Alphabet character* - render_polygons [edit] v0.5
*Helper function to render polygons to the screen with a number of options.* - reverse_factorial [edit] v0.1
*Calculate the reverse factorial. That is if y=x! and y is given, calculate x.* - roman2number [edit] v0.1
*Convert a Roman numeral to a number.* - rot13 [edit] v0.1
*Apply the ROT13 cipher to a string. Simply rotates the letters in the string 13 places -- obviously not secure encryption. To undo ROT13 just run ROT13 on the string again.* - rotate_image_alpha [edit] v0.3
*Rotate an image paying respect to transparency.* - rounded_rectangle [edit] v0.2
*Draw a rectangle with rounded corners.* - round_corners [edit] v0.2
*Round the corners of an image. Transparency and anti-aliasing are supported.* - round_up [edit] v1.0
*Round a number up using precision. Precision is the number of decimal places (can also be negative).*