Re: [R] Problem with Kruskal–Wallis test

2018-12-26 Thread John
On Fri, 21 Dec 2018 16:37:54 +0100 Giuseppe Cillis wrote: > Dear all, > I am a beginner with R (and also with the statistics) for which I > hope to be clear. > I should do this non-parametric test on data I extracted from maps. > In practice I have a column that represents the landscape Dynamics

Re: [R] Problem with Kruskal–Wallis test

2018-12-25 Thread Bert Gunter
"So, I'm not an expert in R and statistics" So you need to seek local help from someone who is. Statistics is usually off-topic for this list -- it is about R programming primarily. And online is probably not a good venue for the sort of discussion you need anyway. Cheers, Bert Bert Gunter

Re: [R] Problem with Kruskal–Wallis test

2018-12-25 Thread Giuseppe Cillis
Dear Michael, Thanks for your answer. So, I'm not an expert in R and statistics, how can I create this interval of confidence of groups? Thanks Gc Il giorno sab 22 dic 2018, 13:34 Michael Dewey ha scritto: > Dear Giuseppe > > If I understand you correctly you have a very large sample size so it

Re: [R] Problem with Kruskal–Wallis test

2018-12-23 Thread Michael Dewey
I think you need to talk to someone who uses your sort of geographic data to find out what an appropriate metric for comparing your variables is. Only then will you know what might be a suitable way forward. Michael On 22/12/2018 17:27, Giuseppe Cillis wrote: Dear Michael, Thanks for your ans

Re: [R] Problem with Kruskal–Wallis test

2018-12-22 Thread Michael Dewey
Dear Giuseppe If I understand you correctly you have a very large sample size so it is not surprising that you get very small p-values. Eevn a scientifically uninteresting difference can become statistically significant with large samples. You probably need to define a metric for meaningful di

[R] Problem with Kruskal–Wallis test

2018-12-21 Thread Giuseppe Cillis
Dear all, I am a beginner with R (and also with the statistics) for which I hope to be clear. I should do this non-parametric test on data I extracted from maps. In practice I have a column that represents the landscape Dynamics of a certain time period (there are 3 dynamics, each of them marked by