Hi,
In the situation where a column in an excel file contains strings and integers but starts with integers, the data type of the column read into Spotfire is integer. It can't be changed from within Spotfire to read string and read in the string data. It must be changed from within the data source itself. Please see attached video.
The idea is that Spotfire recognize this data type as a string, or at least except the manual change to string and not leave the strings as null.
Thanks,
Olga