[R] Heat Map for species - code from Numerical Ecology with R

Sarah Goslee sarah.goslee at gmail.com
Tue Jul 23 21:47:16 CEST 2013

Hi Valerie,

Are you using your own data or data provided by the authors?

If the latter, where can we get it?

If the former, please provide a reproducible example using dput() to
include some of your data.

Also, please resend your message with HTML mail turned off so we can
actually read it.

Providing a reproducible example makes it possible for us to figure
out what went wrong.


On Tue, Jul 23, 2013 at 2:49 PM, Valerie Mucciarelli
<soccermucc at hotmail.com> wrote:
> Hello,   I am relatively new to R and I am working through the code that is provided in the book Numerical Ecology with R and I have run across an error message that I can't seem to figure out.   I am using the vegan, ade4, gclus and cluster packages.  The code is as follows: # Ordered community table # Species are ordered by their weighted averages on site scores or <- vegemite(spe, spe.chwo) spe is the dataframe spe.chwo came from:   spe.norm <- decostand(spe, "normalize")   spe.ch <- vegdist(spe.norm, "euc")   spe.ch.UPGMA <- hclust(spe.ch, method = "average")   spe.chwo <- reorder.hclust(spe.ch.UPGMA, spe.ch)   and the error is Error in vegemite(spe, spe.chwo) :   Cowardly refusing to use longer than 1 char symbols: Use scale  The data in the dataframe is biomass data recorded to 4 digits.  Here is an example of part of the dataframe:
>  AGA   ANT   BON  CAL11 0.42 0.092 0.051 0.0002 0.00 0.000 0.007 0.0024 0.00 0.008 0.000 0.0097 0.00 0.002 0.003 0.002
> I'm wondering if this code is not working because my data is more than one digit long. Any suggestions or insight on how to get this code to work with biomass data would be greatly appreciated. Thank you, Val
>         [[alternative HTML version deleted]]

Sarah Goslee

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