Hello,
I need a basic answer regarding the data matrix used in multivariate analysis.
It contains data of sample spots, which are categorical variables, species, and their abundance on a given scale (1-5), at each given location. What kind of data are species in this case - also categorical, but their abundance is ordinal?
What are your experiences regarding missing values - if I don't have a species present on one location, do I give it a zero or make another number, since PAST won't do PCA analysis with missing data?
Thank you in advance for your answers.
I need a basic answer regarding the data matrix used in multivariate analysis.
It contains data of sample spots, which are categorical variables, species, and their abundance on a given scale (1-5), at each given location. What kind of data are species in this case - also categorical, but their abundance is ordinal?
What are your experiences regarding missing values - if I don't have a species present on one location, do I give it a zero or make another number, since PAST won't do PCA analysis with missing data?
Thank you in advance for your answers.