How to merge data with the same ID in the R language?

In R language, you can use the merge() function to combine data with the same ID. The syntax for merge() function is as follows:

merged_data <- merge(data1, data2, by = "id", all = TRUE)

“Data1 and data2 represent the two datasets to be merged, by = ‘id’ indicates that the merging will be based on the ‘id’ column, and all = TRUE means that all rows will be retained, even if some rows exist in one dataset but not in the other.”

Please note that “id” needs to be replaced with the actual ID column name in the dataset. The merged data will be saved in merged_data.

If you want to merge data based on columns other than just the ID column, you can provide multiple “by” parameters, such as by = c(“id”, “column2”), which will merge the data based on both the “id” and “column2” columns.