Scroll grid to selected row in ExtJs 4

Recently I was working on ExtJs project in which there were required to select row as well as scroll grid to selected row.I found focusRow() method of view but only this did't work.We have to set deferRowRender to false it is config of grid.
Following is code for this.

 // preselect record
grid.getSelectionModel().select(  record  );
               
 //scroll grid to selected record
grid.getView().focusRow( record );

we can also use index of row insted of record.