[R] Modelling categorical variables

2015-09-08 Thread Jessica Lavabre
Hi,

I am a beginner with statistics and R and have no clue on how to model my
data. I have collected information on seed traps (ID) that includes the
habitat type (Hab) and different measures of distances. Also I have applied
a modularity analysis, so that the seeds traps are grouped into modules. My
dataset is as follow:



*IDHab  ModuleDistEdgeMeanDist1MeanDist2MeanDist3
F48F   A 21.768   24.941  6.033
27.642F50F   E 35.666**   60.505  149.927 *
*   48.582   F52F   B** 12.243**   103.041
72.908  *
*102.375N02N  B **58.681**
129.59  127.344   *
* 131.383   N17N  B** 62.829**   72.827 **
76.736  *
*77.644  N22N  B** 89.207**   78.719  **
75.005   *
*   81.176N33N  A** 23.288**   35.48**
25.317 *
* 36.931N40N  B** 36.734**   62.234 **
30.68   *
* 61.885N47N  E  **   60.443**   66.367  **
150.892 **   55.097   *

I am looking for a way to analyze if there is any correlation between the
Module classification and the other variables. My difficulties here are:
1 - is there a way to model my data where Module is the response variable
(something like Module~Hab*DistEdge*MeanDist1) ? If so, which model should
I use (I only have a bit of experience with glm) and which distribution?
2 - Is that a problem if I have different types of predictor variable
(factor and numerical)?

Any help would be greatly appreciated,

-- Jessica Lavabre-Micas

[[alternative HTML version deleted]]

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Re: [R] Modelling categorical variables

2015-09-08 Thread PIKAL Petr
Hi

You probably wont get many answers because:

1 -you post in HTML (post in plain text)
2 -you provide data which are unreadable (copy output of dput(yourdata) instead)
3 -you ask statistical question which are rarely answered here (they are better 
suited to stackexchange list)

Regarding your models nothing prevents you to test any of them - lm, glm, ...
Or go through some available documents on CRAN like e.g.

Using R for Data Analysis and Graphics - Introduction, Examples and Commentary” 
by John Maindonald (PDF, data sets and scripts are available at JM's homepage).
“Practical Regression and Anova using R” by Julian Faraway (PDF, data sets and 
scripts are available at the book homepage).

among many others to learn how to use R for modelling.

Cheers
Petr


> -Original Message-
> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Jessica
> Lavabre
> Sent: Tuesday, September 08, 2015 11:01 AM
> To: r-help@r-project.org
> Subject: [R] Modelling categorical variables
>
> Hi,
>
> I am a beginner with statistics and R and have no clue on how to model
> my data. I have collected information on seed traps (ID) that includes
> the habitat type (Hab) and different measures of distances. Also I have
> applied a modularity analysis, so that the seeds traps are grouped into
> modules. My dataset is as follow:
>
>
>
> *IDHab  ModuleDistEdgeMeanDist1MeanDist2MeanDist3
> F48F   A 21.768   24.941  6.033
> 27.642F50F   E 35.666**   60.505
> 149.927 *
> *   48.582   F52F   B** 12.243**   103.041
> 72.908  *
> *102.375N02N  B **58.681**
> 129.59  127.344   *
> * 131.383   N17N  B** 62.829**   72.827 **
> 76.736  *
> *77.644  N22N  B** 89.207**   78.719  **
> 75.005   *
> *   81.176N33N  A** 23.288**   35.48**
> 25.317 *
> * 36.931N40N  B** 36.734**   62.234 **
> 30.68   *
> * 61.885N47N  E  **   60.443**   66.367  **
> 150.892 **   55.097   *
>
> I am looking for a way to analyze if there is any correlation between
> the Module classification and the other variables. My difficulties here
> are:
> 1 - is there a way to model my data where Module is the response
> variable (something like Module~Hab*DistEdge*MeanDist1) ? If so, which
> model should I use (I only have a bit of experience with glm) and which
> distribution?
> 2 - Is that a problem if I have different types of predictor variable
> (factor and numerical)?
>
> Any help would be greatly appreciated,
>
> -- Jessica Lavabre-Micas
>
>   [[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.


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