XStringViews-constructor {Biostrings} | R Documentation |
A set of basic functions for creating or modifying an XStringViews object.
XStringViews(x, subjectClass, collapse="")
x |
An XString object or a character vector for XStringViews .
|
subjectClass |
The class to be given to the subject of the XStringViews object
created and returned by the function.
Must be the name of one of the direct XString subclasses i.e.
"BString" , "DNAString" , "RNAString"
or "AAString" .
|
collapse |
An optional character string to be inserted between the views of the XStringViews object created and returned by the function. |
The XStringViews
constructor will try to create an XStringViews
object from the value passed to its x
argument.
If x
itself is an XStringViews object, the returned
object is obtained by coercing its subject to the class specified by
subjectClass
.
If x
is an XString object, the returned object is made of
a single view that starts at the first letter and ends at the last letter
of x
(in addition x
itself is coerced to the class
specified by subjectClass
when specified).
If x
is a character vector, the returned object has one view
per character string in x
(and its subject is an instance of
the class specified by subjectClass
).
An XStringViews object y
.
length(y)
(the number of views in y
)
is 1
when x
is an XString object
and length(x)
otherwise.
XStringViews-class, XString-class
v12 <- Views(DNAString("TAATAATG"), start=-2:9, end=0:11) XStringViews(v12, subjectClass="RNAString") XStringViews(AAString("MARKSLEMSIR*")) XStringViews("abcdefghij", subjectClass="BString")