[MINC-users] RMINC - Calculating p-value for the Wilcoxon test

[Tom Beaudry]

thanks for the answer!


On Thu, Jun 6, 2013 at 2:18 PM, Matthijs Van Eede
<matthijs at mouseimaging.ca>wrote:

> Greetings,
>
> I have a reply from Jason to this question, but I don't see it on the
> MINC-users list, so just in case here was his answer:
>
> ***
> Use the pwilcox function - pass it the vector of W values from minc.model
> and the size of each of your two groups.
>
> Jason
> ***
>
> Cheers,
> Matthijs
>
> ----- Original Message -----
> From: "Tom Beaudry" <waveflux at gmail.com>
> To: "MINC users mailing list" <minc-users at bic.mni.mcgill.ca>
> Sent: Monday, May 27, 2013 2:34:51 PM
> Subject: [MINC-users] RMINC - Calculating p-value for the Wilcoxon test
>
> Hi,
>
> I am using RMINC to calculate the W value for an analysis with group sizes
> of 6 and 19. I then get some W values (from 1-114), but how can I calculate
> the associated p-value from the W-Value?
>
> This is the R code that I am using:
>
> rm(list=ls(all=TRUE))
> library(RMINC)
> gf1 <- read.csv("input.csv")
> vs1 <- minc.model(gf1$FA, gf1$group, "wilcoxon")
> vs1[is.na(vs1)] <- 0
> mincWriteVolume(vs1, "output.mnc", gf1$FA)
>
> thanks for the help!
> Thomas Beaudry
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