Re: config. data from internet database
- To: mathgroup at smc.vnet.net
- Subject: [mg14733] Re: config. data from internet database
- From: jim leddon <jleddon at cyberramp.net>
- Date: Wed, 11 Nov 1998 17:53:38 -0500
- Sender: owner-wri-mathgroup at wolfram.com
Hello, I have a question regarding how to extract and put into a list form, numbers from an internet science database file that I have already imported into my Mathematica 3.0 program using "ReadList". The problem is as follows: I want to extract from a file named "1997.ADJ" (which is a list of daily 10.7 cm solar flux values for the year 1997), certain columns of numbers from the period Sept. 1, 1997 to Dec. 31, 1997 which will form a list (time series) which I will use to plot, get a Fourier Transform, a power-spectrum, etc.. The file comes from the internet site: http://www.ngdc.noaa.gov/stp/stp.html and is found after getting into this site by the following steps: Click "Solar and Upper Atmosph." Click "Get Data" "" "Solar Radio" "" " Flux" "" "1997.ADJ" I am at this point where I have read in the file by using the ReadList function as follows: ReadList["a\1997.adj", String] My output is a table of average daily values for each month of 1997 with a header and footer section containing comments. I only want to extract the data values from four columns (Sep., Oct., Nov, Dec). I've tried using mathematica functions such as MemberQ, Character,and Select and have not been successful. At this point, I'd really appreciate some help! Got any ideas? Thanks for your time and consideration. I look forward to hearing from you. Regards, Debbie Leddon