How do I create a new table avoiding duplicates.

[#1]

In JMP Pro 16.0  I have a table with three columns and multiple rows. The columns are named: ID, Amount and Results. The ID values are Characters whereas the Amounts and Results values are numbers. In some cases the ID is one unique id-code for example 3333. In some cases the same ID for example 3334 is duplicated in several rows and each row has their unique values of Amount and Results.

I would like to create a new table where I would like to include the unique id-codes including the values for Amount and Results. However, if there are duplicate ID-codes I would like to include only ID, Amount and Results with the ID with the lowest value of Amount as well as the Results value.

Would appreciate very much for how I should do that. I am at advanced amateur level and know how to write JSL scripts.

Sincerely yours

Lars Enochsson

Professor of Surgery

Karolinska Institutet

Stockholm,

Sweden 

[#2]

Please see the documentation for the Tables > Summary command. You can simply ask for the Minimum value by ID.

[#3]

Thank you for the swift answer. However, it did not completely solve the problem. The thing is that if I have a table like this

ID            Amount       Results

John          10               20

George      5                 43

George      10               24

George      15               32

Matt           40              60

Matt           70              35

I would like to create a new table with the unique ID as well as with the lowest amount and the corresponding Results number. The new table should look like this

ID            Amount       Results

John          10               20

George      5                 43

Matt           40              60

Sincerely yours

Lars

[#4]

Here is a little script that seems to do what you want

Names Default To Here( 1 );
dt = Current Data Table();

dt << select where( :amount == Col Min( :amount, :id ) );

dtFinal = dt << subset(
	selected rows( 1 ),
	selected columns( 0 ),
	output table( "Final" )
);

[#5 · Accepted solution]

Hello Lars,

In response to your question- while this could be done with scripting, it is not necessary. 

A column formula can create an indicator.  From this select matching, where the Flag=1.  Then Tables menu> Subset, selected rows....
I will use sample data file Big Class, with "Age" as an ID that has duplicates.  This is a ordinal value, but the same formula will work with characters.

We will flag the Minimum "Height" within the group of similar "age" in a similar way that you are looking for the minimum "amount" per "ID"

These steps could be recorded with workflow builder in order to make a script.

[#6]

An alternative (not necessarily easier but might be and does not require scripting) is to use Tabulate with ID as the row and using minimum Amount in the body of the table.  Then Make into Data Table and then join that back to the original table, dropping multiples in the with table but bringing in the column for Results.  In the Join Tables, match on both the ID and the Amount columns.