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BUILT-IN MATHEMATICA SYMBOL
ReadList
ReadList["file"]
reads all the remaining expressions in a file and returns a list of them.
ReadList["file", type]
reads objects of the specified type from a file, until the end of the file is reached. The list of objects read is returned.
ReadList["file", {type1, type2, ...}]
reads objects with a sequence of types, until the end of the file is reached.
ReadList["file", types, n]
reads only the first n objects of the specified types.
Details and Options
- Possible types to read are:
-
Byte single byte, returned as an integer code Character single character, returned as a one-character string Expression complete Mathematica expression Number integer or an approximate number, given in "E" format Real approximate number, given in "E" format Record sequence of characters delimited by record separators String string terminated by a newline Word sequence of characters delimited by word separators - Objects of type Real can be given in the scientific notation format used by languages such as C and Fortran, as well as in standard Mathematica format. A form like
or 
as well as 
can be used to represent the number 
. Objects read as type Real are always returned as approximate numbers. Objects read as type Number are returned as integers if they contain no explicit decimal points. - The following options can be given:
-
NullRecords False whether to assume a null record between repeated record separators NullWords False whether to assume a null word between repeated word separators RecordSeparators {"\r\n","\n","\r"} separators allowed between records RecordLists False create separate sublists for each record TokenWords {} words taken as delimiters WordSeparators {" ","\t"} separators allowed between words - If file is not already open for reading, ReadList opens it, then closes it when it is finished. If the file is already open, ReadList does not close it at the end.
- ReadList prints a message if any of the objects remaining in the file are not of the specified types.
- ReadList["file", {type1, ...}] looks for the sequence of
in order. If the end of file is reached while part way through the sequence of 
, EndOfFile is returned in place of the elements in the sequence that have not yet been read. - ReadList[stream] reads from an open input stream, as returned by OpenRead.
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