[R] pearson correlation significant level
Hello I am using package Hmisc to calculate the pearson correlation and the significant level for the matrix of t_i and t_r. (temperature minimum and temperature range) However, I have difficulty interpreting the result, even after checking the manual. Please kindly help to indicate if the p-value is zero. Thank you in advance. Elaine The code library(Hmisc) rcorr(as.matrix(datat), type=pearson) # type can be pearson or spearman The result is t_i t_r t_i 1.00 -0.89 t_r -0.89 1.00 n= 4873 P t_i t_r t_i 0 t_r 0 [[alternative HTML version deleted]] __ R-help@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.
Re: [R] pearson correlation significant level
Dear Elaine, One of the elements you obtain the P matrix, which is the matrix of asymptotic p-values. In your case, you get that the asymptotic p-value of the association between t_i and t_r is 0. That is, there would exist a perfect association (look also at the first result, the matrix of correlations: the correlation coefficient between these variables is 1). Hope this helps, José Prof. José Iparraguirre Chief Economist Age UK -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Elaine Kuo Sent: 17 May 2013 10:40 To: r-help@r-project.org Subject: [R] pearson correlation significant level Hello I am using package Hmisc to calculate the pearson correlation and the significant level for the matrix of t_i and t_r. (temperature minimum and temperature range) However, I have difficulty interpreting the result, even after checking the manual. Please kindly help to indicate if the p-value is zero. Thank you in advance. Elaine The code library(Hmisc) rcorr(as.matrix(datat), type=pearson) # type can be pearson or spearman The result is t_i t_r t_i 1.00 -0.89 t_r -0.89 1.00 n= 4873 P t_i t_r t_i 0 t_r 0 [[alternative HTML version deleted]] __ R-help@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. Please donate to the Syria Crisis Appeal by text or online: To donate £5 by mobile, text SYRIA to 70800. To donate online, please visit http://www.ageinternational.org.uk/syria Over one million refugees are desperately in need of water, food, healthcare, warm clothing, blankets and shelter; Age International urgently needs your support to help affected older refugees. Age International is a subsidiary charity of Age UK and a member of the Disasters Emergency Committee (DEC). The DEC launches and co-ordinates national fundraising appeals for public donations on behalf of its member agencies. Texts cost £5 plus one standard rate message. Age International will receive a minimum of £4.96. More info at ageinternational.org.uk/SyriaTerms --- Age UK is a registered charity and company limited by guarantee, (registered charity number 1128267, registered company number 6825798). Registered office: Tavis House, 1-6 Tavistock Square, London WC1H 9NA. For the purposes of promoting Age UK Insurance, Age UK is an Appointed Representative of Age UK Enterprises Limited, Age UK is an Introducer Appointed Representative of JLT Benefit Solutions Limited and Simplyhealth Access for the purposes of introducing potential annuity and health cash plans customers respectively. Age UK Enterprises Limited, JLT Benefit Solutions Limited and Simplyhealth Access are all authorised and regulated by the Financial Services Authority. -- This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you receive a message in error, please advise the sender and delete immediately. Except where this email is sent in the usual course of our business, any opinions expressed in this email are those of the author and do not necessarily reflect the opinions of Age UK or its subsidiaries and associated companies. Age UK monitors all e-mail transmissions passing through its network and may block or modify mails which are deemed to be unsuitable. Age Concern England (charity number 261794) and Help the Aged (charity number 272786) and their trading and other associated companies merged on 1st April 2009. Together they have formed the Age UK Group, dedicated to improving the lives of people in later life. The three national Age Concerns in Scotland, Northern Ireland and Wales have also merged with Help the Aged in these nations to form three registered charities: Age Scotland, Age NI, Age Cymru. __ R-help@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.
Re: [R] pearson correlation significant level
On 2013-05-17 08:37, Jose Iparraguirre wrote: Dear Elaine, One of the elements you obtain the P matrix, which is the matrix of asymptotic p-values. In your case, you get that the asymptotic p-value of the association between t_i and t_r is 0. That is, there would exist a perfect association (look also at the first result, the matrix of correlations: the correlation coefficient between these variables is 1). Hope this helps, José Actually, the coefficient is -0.89. Not surprisingly, with n = 4873, this indicates a significant correlation. For details of the t-test involved in the calculation, see any intro stats text or look at the code of cor.test.default(). Peter Ehlers Prof. José Iparraguirre Chief Economist Age UK -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Elaine Kuo Sent: 17 May 2013 10:40 To: r-help@r-project.org Subject: [R] pearson correlation significant level Hello I am using package Hmisc to calculate the pearson correlation and the significant level for the matrix of t_i and t_r. (temperature minimum and temperature range) However, I have difficulty interpreting the result, even after checking the manual. Please kindly help to indicate if the p-value is zero. Thank you in advance. Elaine The code library(Hmisc) rcorr(as.matrix(datat), type=pearson) # type can be pearson or spearman The result is t_i t_r t_i 1.00 -0.89 t_r -0.89 1.00 n= 4873 P t_i t_r t_i 0 t_r 0 [[alternative HTML version deleted]] __ R-help@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. Please donate to the Syria Crisis Appeal by text or online: To donate £5 by mobile, text SYRIA to 70800. To donate online, please visit http://www.ageinternational.org.uk/syria Over one million refugees are desperately in need of water, food, healthcare, warm clothing, blankets and shelter; Age International urgently needs your support to help affected older refugees. Age International is a subsidiary charity of Age UK and a member of the Disasters Emergency Committee (DEC). The DEC launches and co-ordinates national fundraising appeals for public donations on behalf of its member agencies. Texts cost £5 plus one standard rate message. Age International will receive a minimum of £4.96. More info at ageinternational.org.uk/SyriaTerms --- Age UK is a registered charity and company limited by guarantee, (registered charity number 1128267, registered company number 6825798). Registered office: Tavis House, 1-6 Tavistock Square, London WC1H 9NA. For the purposes of promoting Age UK Insurance, Age UK is an Appointed Representative of Age UK Enterprises Limited, Age UK is an Introducer Appointed Representative of JLT Benefit Solutions Limited and Simplyhealth Access for the purposes of introducing potential annuity and health cash plans customers respectively. Age UK Enterprises Limited, JLT Benefit Solutions Limited and Simplyhealth Access are all authorised and regulated by the Financial Services Authority. -- This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you receive a message in error, please advise the sender and delete immediately. Except where this email is sent in the usual course of our business, any opinions expressed in this email are those of the author and do not necessarily reflect the opinions of Age UK or its subsidiaries and associated companies. Age UK monitors all e-mail transmissions passing through its network and may block or modify mails which are deemed to be unsuitable. Age Concern England (charity number 261794) and Help the Aged (charity number 272786) and their trading and other associated companies merged on 1st April 2009. Together they have formed the Age UK Group, dedicated to improving the lives of people in later life. The three national Age Concerns in Scotland, Northern Ireland and Wales have also merged with Help the Aged in these nations to form three registered charities: Age Scotland, Age NI, Age Cymru. __ R-help@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. __ R-help@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.
Re: [R] pearson correlation significant level
Just stating the obvious that Peter left unsaid: The OP calculated a matrix, whose diagonal is the correlations between each variable and itself, with the off-diagonal entries being the ones of interest. On 17-May-13, at 11:06 AM, Peter Ehlers wrote: On 2013-05-17 08:37, Jose Iparraguirre wrote: Dear Elaine, One of the elements you obtain the P matrix, which is the matrix of asymptotic p-values. In your case, you get that the asymptotic p-value of the association between t_i and t_r is 0. That is, there would exist a perfect association (look also at the first result, the matrix of correlations: the correlation coefficient between these variables is 1). Hope this helps, José Actually, the coefficient is -0.89. Not surprisingly, with n = 4873, this indicates a significant correlation. For details of the t-test involved in the calculation, see any intro stats text or look at the code of cor.test.default(). Peter Ehlers Prof. José Iparraguirre Chief Economist Age UK -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- project.org] On Behalf Of Elaine Kuo Sent: 17 May 2013 10:40 To: r-help@r-project.org Subject: [R] pearson correlation significant level Hello I am using package Hmisc to calculate the pearson correlation and the significant level for the matrix of t_i and t_r. (temperature minimum and temperature range) However, I have difficulty interpreting the result, even after checking the manual. Please kindly help to indicate if the p-value is zero. Thank you in advance. Elaine The code library(Hmisc) rcorr(as.matrix(datat), type=pearson) # type can be pearson or spearman The result is t_i t_r t_i 1.00 -0.89 t_r -0.89 1.00 n= 4873 P t_i t_r t_i 0 t_r 0 [[alternative HTML version deleted]] __ R-help@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. Please donate to the Syria Crisis Appeal by text or online: To donate £5 by mobile, text SYRIA to 70800. To donate online, please visit http://www.ageinternational.org.uk/syria Over one million refugees are desperately in need of water, food, healthcare, warm clothing, blankets and shelter; Age International urgently needs your support to help affected older refugees. Age International is a subsidiary charity of Age UK and a member of the Disasters Emergency Committee (DEC). The DEC launches and co-ordinates national fundraising appeals for public donations on behalf of its member agencies. Texts cost £5 plus one standard rate message. Age International will receive a minimum of £4.96. More info at ageinternational.org.uk/SyriaTerms --- Age UK is a registered charity and company limited by guarantee, (registered charity number 1128267, registered company number 6825798). Registered office: Tavis House, 1-6 Tavistock Square, London WC1H 9NA. For the purposes of promoting Age UK Insurance, Age UK is an Appointed Representative of Age UK Enterprises Limited, Age UK is an Introducer Appointed Representative of JLT Benefit Solutions Limited and Simplyhealth Access for the purposes of introducing potential annuity and health cash plans customers respectively. Age UK Enterprises Limited, JLT Benefit Solutions Limited and Simplyhealth Access are all authorised and regulated by the Financial Services Authority. -- This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you receive a message in error, please advise the sender and delete immediately. Except where this email is sent in the usual course of our business, any opinions expressed in this email are those of the author and do not necessarily reflect the opinions of Age UK or its subsidiaries and associated companies. Age UK monitors all e-mail transmissions passing through its network and may block or modify mails which are deemed to be unsuitable. Age Concern England (charity number 261794) and Help the Aged (charity number 272786) and their trading and other associated companies merged on 1st April 2009. Together they have formed the Age UK Group, dedicated to improving the lives of people in later life. The three national Age Concerns in Scotland, Northern Ireland and Wales have also merged with Help the Aged in these nations to form three registered charities: Age Scotland, Age NI, Age Cymru. __ R-help@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
