As Rui noted, to get a trend you need to focus on percent gray vs age since hair color is not an ordinal/rank variable. Then use a measure of association designed for rank variables of which there are many: Spearman’s r, Kendall’s tau, gamma, tau-c, Somers-d. All of them are available in package DescTools.
David C From: vod vos [mailto:vod...@zoho.com] Sent: Tuesday, January 10, 2017 6:03 AM To: David L Carlson Cc: Rui Barradas; r-help Subject: Re: [R] how to proof the trend of two columns of data? as far as I know, ?kruskal.test will show us the differences between three or more groups. But it could show the trend. ---- On 星期一, 09 一月 2017 10:12:14 -0800 David L Carlson <dcarl...@tamu.edu<mailto:dcarl...@tamu.edu>> wrote ---- The list does not assist with homework problems. If this is not a class assignment, you should be more specific about what you have tried and provide a reproducible example (a sample of the real data or some made-up data that has the same columns and data types). In the meantime you could also try the following R command: > ?kruskal.test ------------------------------------- David L Carlson Department of Anthropology Texas A&M University College Station, TX 77840-4352 -----Original Message----- From: R-help [mailto:r-help-boun...@r-project.org<mailto:r-help-boun...@r-project.org>] On Behalf Of Rui Barradas Sent: Monday, January 9, 2017 11:28 AM To: vod vos; r-help Subject: Re: [R] how to proof the trend of two columns of data? Hello, Inline. Em 09-01-2017 14:55, vod vos escreveu: > Hello everyone, > > > > If there are two columns, one is age (numeric, cut to several groups), the > other is hair color type(factor: yellow, black, white). > > > > If the age column is not normal distributed If you use ?lm, it's the residuals that should be normally distributed, not age. You can also use ?glm with a binomial link, in which case you should recode type as white/not white. Hope this helps, Rui Barradas , which statistic method should use to prove the trend relationship between them, for example, the older has more probability of white hair type? Are there any existed R package to figure out this situation? > > > > Thank you. > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org<mailto:R-help@r-project.org> mailing list -- To > UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help<https://urldefense.proofpoint.com/v2/url?u=https-3A__stat.ethz.ch_mailman_listinfo_r-2Dhelp&d=CwMFaQ&c=ODFT-G5SujMiGrKuoJJjVg&r=veMGHMCNZShld-KX-bIj4jRE_tP9ojUvB_Lqp0ieSdk&m=dYbJ1jQFhNgZSpX0dKdCO9D4cZWmkFMSAQSB3IC3bgY&s=U9wEEeg-qBbAGd3kjbAL6vlYC7cHatQHXWCc216ugVA&e=> > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.R-2Dproject.org_posting-2Dguide.html&d=CwMFaQ&c=ODFT-G5SujMiGrKuoJJjVg&r=veMGHMCNZShld-KX-bIj4jRE_tP9ojUvB_Lqp0ieSdk&m=dYbJ1jQFhNgZSpX0dKdCO9D4cZWmkFMSAQSB3IC3bgY&s=cvDboOH1gMUry-kXLtHgdlh4ICbrTPQE9fjNNO2xPho&e=> > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org<mailto:R-help@r-project.org> mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help<https://urldefense.proofpoint.com/v2/url?u=https-3A__stat.ethz.ch_mailman_listinfo_r-2Dhelp&d=CwMFaQ&c=ODFT-G5SujMiGrKuoJJjVg&r=veMGHMCNZShld-KX-bIj4jRE_tP9ojUvB_Lqp0ieSdk&m=dYbJ1jQFhNgZSpX0dKdCO9D4cZWmkFMSAQSB3IC3bgY&s=U9wEEeg-qBbAGd3kjbAL6vlYC7cHatQHXWCc216ugVA&e=> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.R-2Dproject.org_posting-2Dguide.html&d=CwMFaQ&c=ODFT-G5SujMiGrKuoJJjVg&r=veMGHMCNZShld-KX-bIj4jRE_tP9ojUvB_Lqp0ieSdk&m=dYbJ1jQFhNgZSpX0dKdCO9D4cZWmkFMSAQSB3IC3bgY&s=cvDboOH1gMUry-kXLtHgdlh4ICbrTPQE9fjNNO2xPho&e=> and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org<mailto:R-help@r-project.org> mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help<https://urldefense.proofpoint.com/v2/url?u=https-3A__stat.ethz.ch_mailman_listinfo_r-2Dhelp&d=CwMFaQ&c=ODFT-G5SujMiGrKuoJJjVg&r=veMGHMCNZShld-KX-bIj4jRE_tP9ojUvB_Lqp0ieSdk&m=dYbJ1jQFhNgZSpX0dKdCO9D4cZWmkFMSAQSB3IC3bgY&s=U9wEEeg-qBbAGd3kjbAL6vlYC7cHatQHXWCc216ugVA&e=> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.R-2Dproject.org_posting-2Dguide.html&d=CwMFaQ&c=ODFT-G5SujMiGrKuoJJjVg&r=veMGHMCNZShld-KX-bIj4jRE_tP9ojUvB_Lqp0ieSdk&m=dYbJ1jQFhNgZSpX0dKdCO9D4cZWmkFMSAQSB3IC3bgY&s=cvDboOH1gMUry-kXLtHgdlh4ICbrTPQE9fjNNO2xPho&e=> and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
