var point=new Array(); function myFunction() { id="1k4S9XIrGyfuLOLst0xeBlSR4KDWQzvszQGPoeWEfHqk"; ex = SpreadsheetApp.openById(id); var sheet = ex.getSheetByName("data"); var v=sheet.getRange(1,1,20,4).getValues(); for(s=1;s<20;s++){ point[s]=v[s][1]; } p1=0; for(s=1;s<20;s++){ p1=p1+point[s]; } p1=p1/19; Logger.log(p1); }