PHPExcel Repeat Columns at Left -

i want repeat columns @ left excel report. used phpexcel, , function

$objphpexcel->getactivesheet()->getpagesetup()->getcolumnstorepeatatleft();

the problem don't know how , should put parameters. want repeat column , b every page. :)

$objphpexcel->getactivesheet()->getpagesetup()->setcolumnstorepeatatleftbystartandend('a', 'b'); 

this should work.