[R] Need help

Hi,  R development team,   I am trying to use PCA in labdsv package.I need to build the ordination plot from scratch. I used the following code (which is used in RDA) and I cannot get the species (variable centroids)  to the ordination plot, only I can plot sample unit scores.Can somone help me

[R] Need Help

Hi, I need to make a subset of my species abundance matrix with only species (columns) that have a total abundance(column sum) greater than 0.5 to do ordination in vegan package. I used following code but it is not working. Can you please give me a solution.   gl1- subset(grassland[,5:44],

[R] distance coefficient for amatrix with ngative valus

Hi, I need to run a PCoA (PCO) for a data set wich has both positive and negative values for variables. I  could not find any distancecoefficient other than euclidean distace running for the data set. Are there any other coefficient works with negtive values.Also I cannot get summary out put