hi @ all, I have problem with creating a matrix for a cor() function. I try to use the cor() function on a matrix to test the correlation between each value in a column. Maybe like corr(x, method = xyz). My x has two columns maybe like this: MEDIA VALUE Car 23 Train 26 Plane 25 Cab 22 Bike 15 .... and so on. Now I want to calculate the correlation between Car and Train, Car and Plane, Train and Plane and so on. Sorry but I don't have a clue and I hope there is an easy way to solve my problem. Thanks a lot for all answers. Greetz Geo -- View this message in context: http://r.789695.n4.nabble.com/Matrix-for-correlation-tp4119590p4119590.html Sent from the R help mailing list archive at Nabble.com.
I'm not sure how you mean to calculate correlation if you have a single observation of each medium....can you provide your data (or a subset thereof) so we can see what you are actually working with and if correlation makes sense. Michael On Tue, Nov 29, 2011 at 10:41 AM, Geophagus <falk.hilliges at twain-systems.com> wrote:> hi @ all, > I have problem with creating a matrix for a cor() function. > I try to use the cor() function on a matrix to test the correlation between > each value in a column. > Maybe like corr(x, method = xyz). > My x has two columns maybe like this: > > MEDIA ?VALUE > Car ? ? ?23 > Train ? ?26 > Plane ? 25 > Cab ? ? 22 > Bike ? ? 15 > > .... and so on. > > Now I want to calculate the correlation between Car and Train, Car and > Plane, Train and Plane and so on. > > Sorry but I don't have a clue and I hope there is an easy way to solve my > problem. > Thanks a lot for all answers. > > Greetz Geo > > > -- > View this message in context: http://r.789695.n4.nabble.com/Matrix-for-correlation-tp4119590p4119590.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >
On 29.11.2011 16:41, Geophagus wrote:> hi @ all, > I have problem with creating a matrix for a cor() function. > I try to use the cor() function on a matrix to test the correlation between > each value in a column. > Maybe like corr(x, method = xyz). > My x has two columns maybe like this: > > MEDIA VALUE > Car 23 > Train 26 > Plane 25 > Cab 22 > Bike 15 > > .... and so on.>> Now I want to calculate the correlation between Car and Train, Car and > Plane, Train and Plane and so on. >If the above is your data, then you have indeed no clue what the word "correlation" means. Please look it up in a textbook and find why you cannot calculate it for this kind of data. If you do not find, please ask a local statistician for help. Uwe Ligges> Sorry but I don't have a clue and I hope there is an easy way to solve my > problem. > Thanks a lot for all answers. > > Greetz Geo > > > -- > View this message in context: http://r.789695.n4.nabble.com/Matrix-for-correlation-tp4119590p4119590.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.
Hi Michael, thank you so much for your fast reply. On the image below there is an example of what I mean. I need the correlation between the values on the fields with "?". http://r.789695.n4.nabble.com/file/n4119734/corr_ex.png But my source data is not in a matrix. It looks like the table in my first post. Do you understand my problem? Thanks a lot! Geophagus -- View this message in context: http://r.789695.n4.nabble.com/Matrix-for-correlation-tp4119590p4119734.html Sent from the R help mailing list archive at Nabble.com.