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.
Delimiting characters, specified as a character vector, a 1-by-N cell array of character vectors, or a 1-by-N string array. 1  If delimiter is a character vector, then strjoin forms str by inserting delimiter between each element of C. The delimiter input can include any of these escape sequences: \\. Backslash.