I am dealing with a huge data set collected from an YSI water monitoring probe - the data includes water depth, transect location, temperature, conductivity, salinity, pressure etc etc. I am trying to do basic summary statistics on my data and analyze the data. My data is organized by water depth (3, 10, 20, 40), week (1-5) and by five transects. I am having trouble dealing with my data and separating it by week and by transect to see if there are trends. I also want to do basic tests of normality. Any suggestions? Please help. -- View this message in context: http://r.789695.n4.nabble.com/YSI-data-in-R-tp4677459.html Sent from the R help mailing list archive at Nabble.com.
On 10/03/13 11:51, Orlen wrote:> I am dealing with a huge data set collected from an YSI water monitoring > probe - the data includes water depth, transect location, temperature, > conductivity, salinity, pressure etc etc. I am trying to do basic summary > statistics on my data and analyze the data. > > My data is organized by water depth (3, 10, 20, 40), week (1-5) and by five > transects. > > I am having trouble dealing with my data and separating it by week and by > transect to see if there are trends. > > I also want to do basic tests of normality. > > Any suggestions? Please help.Your question is far too vague for anyone to be able to say anything even remotely useful. What have you tried? What "trouble" are you having? Illustrate the problem(s) with small toy data set or a small subset of your real data? Why do you want to do tests of normality? These are usually completely irrelevant. cheers, Rolf Turner
My apologies. I want to test for normality to determine whether I need to use parametric or nonparametric tests to analyze the data. A prof suggested this was a good place to start with my data. I have attached a copy of part of my data. There are five transects, and five weeks, and each transect has up to four water depths (3, 10, 20, 40) <http://r.789695.n4.nabble.com/file/n4677465/Screen_Shot_2013-10-02_at_9.56.50_PM.png> Does this make it a bit more clear? Please let me know if there is anything else I can add to clarify the issues I am having. I have tried doing histograms but i cant figure out how to make multiple ones at one time for each variable by week for each transect. -- View this message in context: http://r.789695.n4.nabble.com/YSI-data-in-R-tp4677459p4677465.html Sent from the R help mailing list archive at Nabble.com.