Addmetadata to seurat obj

Question

[synat.keam]

Dear all,

It is a bit of coding issue. I have Seurat obj seurat.obj.T and in the metadata, a column type contains three levels of arthritis " First arthritis", "Second arthritis" and "Osteoarthritis". I would like to create a another column called group based on the value of the type column by naming First arthritis" to ICI-arthritis and Second Arthritis to ICI-arthritis and Osteoarthritis still = Osteoarthritis. I tried the following codes, but error twice. Could you help check!

seurat.obj.T <- AddMetaData(object = seurat.obj.T, metadata = "group", data = ifelse([e-mail]$type %in% c("First arthritis", "Second arthritis"), "ICI-arthritis", "Osteoarthritis"))

or

seurat.obj.T$group <- ifelse(seurat.obj.T$type %in% c("First arthritis", "Second arthritis"), "ICI-arthritis", "Osteoarthritis")
seurat.obj.T <- AddMetaData(object = seurat.obj.T, metadata = "group")

Thanks in advance.

Kind Regards

[bk11]

You can do something like below:-

[e-mail]$group[which([e-mail]$type == "First arthritis")] <- "ICI-arthritis"
[e-mail]$group[which([e-mail]$type == "Second Arthritis")] <- "ICI-arthritis"
[e-mail]$group[which([e-mail]$type == "Osteoarthritis")] <- "Osteoarthritis"

[synat.keam]

Thanks you! Regards

[fracarb8]

You should include, or specify, the errors that you are getting.

[synat.keam]

I fixed it. in case anyone faced the same issue.

[e-mail]$group <- ifelse([e-mail]$type %in% c("First arthritis", "Second arthritis"), "ICI-arthritis", "Osteoarthritis")