Hi, I have just run songbird and got the outputs,

I would like to plot the biplot in R but I am missing something to do with the colour? I have read that that can be due to the group being full of NAs (which it isn’t?)or being character, which it is.

```
regression_biplot <- read_qza('~/Documents/songbird_test/regression-biplot.qza')
regression_biplot <- read_qza('~/Documents/songbird_test/regression-biplot.qza')
regression_Eigvals<- regression_biplot$data$Eigvals
regression_variance<- regression_biplot$data$ProportionExplained
percentVar <- round(regression_variance*100)
regression_biplot$data$Vectors %>%
select(SampleID, PC1, PC2) %>%
left_join(metadata) %>%
ggplot(aes(x=PC1, y=PC2, color= `group`)) +
geom_point(alpha=0.9) +
theme_q2r() +
scale_shape_manual(values=c(16,1), name="group") +
scale_color_discrete(name="group")+ ggtitle("Regression biplot") +
theme(plot.title = element_text(lineheight=.8, face="bold", size=12))
```

Error: Must request at least one colour from a hue palette.

My group column is a character (T or P)