Student Support Forum: 'Using items in a list as variables in a function' topicStudent Support Forum > General > "Using items in a list as variables in a function"

 Next Comment > Help | Reply To Topic
 Author Comment/Response mlucas 05/21/12 01:50am Hi All, I am new to mathematica and this kind of work in general, and was looking to score a little help on this thread. I basically need to build a data set that contains city information, country information, coordinates, and weather information. I want to do this using Mathematica's curated data sets. WeatherData, CityData, and CountryData. Below is what I have worked out so far: Module[ {dateRange, mean, cdd, hdd, station, country, location, population, GDPPerCapita, reference = (65 - 32)/1.8, cumList}, station = "Chicago"; country = CityData[station, "Country"]; population = CityData[station, "Population"]; location = CityData[station, "Coordinates"]; GDPPerCapita = CountryData[country, "GDPPerCapita"]; dateRange = {{2011, 1, 1}, {2011, 12, 31}, "Day"}; mean = WeatherData[station, "MeanTemperature", dateRange]; cdd = Join[Transpose[{mean[[All, 1]]}], Transpose[{Max[# - reference, 0] & /@ mean[[All, 2]]}], 2]; hdd = Join[Transpose[{mean[[All, 1]]}], Transpose[{Min[# - reference, 0] & /@ mean[[All, 2]]}], 2]; cumList = Transpose[{Join[ Transpose[{cdd[[All, 1]]}], Transpose[{Drop[FoldList[Plus, 0, cdd[[All, 2]] + hdd[[All, 2]]], 1]}], 2]}]; Grid[station, country, location, population, GDPPerCapita, Last[cumList]]] Which gives the following result... Grid["Chicago", "UnitedStates", {41.8376, -87.6818}, 2695598, \ 45230.2, {{{2011, 12, 31}, -2842.41}}] Basically what I am looking for is a way to make the "station" variable, I want my function to cycle through all of the 160,000ish cities on the list and make a table record for each one. The search term i want to use is simply the city name, all items in the list below cityList = CityData[#, "Name"] & /@ CityData[] I'm sure this is possible, but i am a complete newbie when it comes to anything like this, I thought I would seek some expert advice. So to repeat myself, i just need the station name to be variable, and for the function to loop through all the cities, and to output to a table form or csv. Thanks in advance, Matt URL: ,

 Subject (listing for 'Using items in a list as variables in a function') Author Date Posted Using items in a list as variables in a function mlucas 05/21/12 01:50am Re: Using items in a list as variables in a fun... yehuda 05/21/12 10:58pm
 Next Comment > Help | Reply To Topic