[R] Non-metric multi-dimensional scaling with NAs / 0s

Hi, I am tryng to use Non-metric multi-dimensional (MDS) to illustrate the difference in mixed-species flock composition between two species of birds. It is part of a thesis I am currently working on. My data consists of 18 columns and 62 rows, with numbers ranging from 0 to 7. I have

[R] Error bars on barplots for only particular bars

Hi, I have a data set that has columns bird.species, tree.speciesand count. I am investigating differences in tree species usge by two species of birds. Count is numerical and is a count of observations of bird species x using tree species x. For bird species A I have 3 different counts for

[R] Non-metric multidimensional scaling (NMDS) help

Hi, I am currently working on some data and feel that NMDS would return an excellent result. With my current data set however I have been experiencing some problems and cannot carry out metaMDS. I have tried with a few smaller data sets which I created for practice sake and this has worked