vif.cca Error in qr.X(Q)
powerfulDie opened this issue · 0 comments
Thank you for the nice tool.
I have a data frame named Env.bank which is the environment data. A total of 26 columns were in this data frame, and the first column was named Sample_ID.
Then I ran:
rda_bank <- rda(Origin_bank_hell ~ ., data=Env.bank[,2:26], scale = TRUE))
vif_bank <- vif.cca(rda_bank)
Everything is OK.
But I want to use the while loop to delete the maximum vif value one by one. so I edited the Sample_ID as the rownames.
Env.bank.LOOP <- Env.bank%>% column_to_rownames("Sample_ID")
Then I ran the same command as above:
(rda_bank1 <- rda(Origin_bank_hell ~ ., data=Env.bank.LOOP,scale = TRUE))
vif_bank <- vif.cca(rda_bank1)
there was an error: **Error in qr.X(Q) : need larger value of 'ncol' as pivoting occurred**
.
I searched for the reason in chatGPT. It commented that
"it might indicate a potential issue with the collinearity or structure of your data. This error can occur when the design matrix used to fit the model is not full rank."
I am confused. Because there were different results when I used the same data to execute. Did you meet the same case?
Would it be possible for you to help me?