In which week you would like to scrape, can be an array, like 3:5
station1
the start station index on the page
station2
the end station index on the page
proxy
Whether to use proxy, default is FALSE
Details
Get monitoring data of different stations from Minitsry of Environmental Protection of China (http://datacenter.mep.gov.cn/report/getCountGraph.do?type=runQianWater). Using this function
you will get data of all the stations. Since the number of stations vary with time, using this function, you have
to make sure that within the period you are scrapping, the number of stations keep consistant.