Transcranial Doppler (TCD), first described in 1982 [1], is a noninvasive ultrasound (US) study that involves the use of a low-frequency (â¤2 MHz) transducer probe to insonate the basal cerebral arteries through relatively thin bone windows.
Details. as.character and is.character are generic: you can write methods to handle specific classes of objects, see InternalMethods. Further, for as.character the default method calls as.vector, so dispatch is first on methods for as.character and then for methods for as.vector.
If you want another simple tutorial, this one or this one. If you don't want the result as a char data type, but rather as a string, you would use the Character.toString method: If you want more information on the Character class and the toString method, I pulled my info from the documentation on Character.toString. share | improve this answer.