SYNTAX: [success,message] = xlsappend(file,data,sheet)
XLSAPPEND Stores numeric array or cell array to the end of specified Excel sheet.
REQUIRES ONLY ONE CALL TO THE EXCEL ACTXSERVER, so the overhead is less than for successive xlsread/xlswrite calls.
[SUCCESS,MESSAGE]=XLSAPPEND(FILE,ARRAY,SHEET) writes ARRAY to the Excel workbook, FILE, into the area beginning at COLUMN A and FIRST UNUSED ROW, in the worksheet specified in SHEET. FILE and ARRAY must be specified. If either FILE or ARRAY is empty, an error is thrown and XLSAPPEND terminates. The first worksheet of the workbook is the default. If SHEET does not exist, a new sheet is added at the end of the worksheet collection. If SHEET is an index larger than the number of worksheets, new sheets are appended until the number of worksheets in the workbook equals SHEET. The success of the operation is returned in SUCCESS and any accompanying message, in MESSAGE. On error, MESSAGE shall be a struct, containing the error message and message ID.