调用CountA函数 数据连续的话
exl = actxserver('excel.application');
exlWkbk = exl.Workbooks;
exlFile = exlWkbk.Open([docroot '/techdoc/matlab_external/examples/input_resp_data.xls']);%自带文件
exlSheet1 = exlFile.Sheets.Item('Sheet1');
Rows=exl. Application.WorksheetFunction.CountA(exlSheet1.Range('A:A'))
Rows =1590