1. when using Open, the data type will be no change
dt = Open( "$SAMPLE_DATA/Big Class.jmp");
2. But when using Multiple File Import, all column data type change to character type, how to keep the original data type for all columns?
path=Get Path Variable( "SAMPLE_DATA" );Files=Multiple File Import(<<Set Folder(path),<<Set Name Filter ("Big*.jmp"),<<Set Name Enable(1))<< Import Data();
I don't think you can avoid the character column issue with Multiple File Import and .jmp files in JMP 14. It is fixed in JMP 15 (future release).
Here's a possible solution.