Re: creating biplots from existing multivariate output

I have a question about creating biplots from *existing* output by PCA, canonical variates analysis (CVA) and correspondence analysis. Legendre Legendre 1998, Numerical Ecology, 2nd ed, Elsevier, Amsterdam provides excellent descriptions of the different ways of displaying biplots

creating biplots from existing multivariate output

I have a question about creating biplots from *existing* output by PCA, canonical variates analysis (CVA) and correspondence analysis. Am I right in thinking that variable and object scores in correspondence analysis are scaled to the same space and so require no further treatment for producing

output

variables are in TWO other columns ... it is easy to get a nice graph ... and do the anova which yielded one main effect and a significant interaction graph = 1 page ... anova output = part of 1 page ... now, if you wanted to do some multiple comparisons ... say, the tukey test

Re: output

perhaps we need for software to have 2 overall options ... show me all the output or, in the case of some interaction plots ... find a graphing method ... using different symbols ... that represent ON the graph ... pairs that are different from others (ie, any pair of DARK dots means