Fill empty cells with last valid value

[#1]

Hello,

I have the following problem. My dataset is composed by a list of rows, each representing one item produced by a machine. Normal items are not measured, but from time to time some "measurement items" are produced and the propetries measured. The assumption is that all the parts not measured will have properties similar to the latest measurment. How can I fill the empty cells using this logic?

I attached an example, so that it is easier to understand, the table looks like this:

Time      Order                    Test Value        (Expected)
1            Measurement            2.5                     2.5
2            Production                 -                         2.5
3            Production                 -                         2.5
4            Measurement            2                         2
5            Production                 -                         2 
6            Production                 -                         2 
7            Production                 -                         2 
8            Measurement            3                        3
9            Production                 -                         3 
10          Production                 -                         3

[#2 · Accepted solution]

perhaps the following line of script can help:

Names Default To Here( 1 );
dt = Current Data Table();
For( i = 2, i <= N Rows( dt ), i++,
	If( Is Missing( :test value[i] ),
		:test value[i] = :test value[i - 1]
	)
);

best,

ron

[#3]

Hi Ron,

Can I use this for character values? Ex: my Lot ID column composed of names merged, then the last/above lot id to fill-in all blanks below it until n

sub << New Column( "Lot ID", Formula( :CUST Lot ID || :SPIL Lot ID || :Stage ) );
For( i = 2, i <= N Rows( sub ), i++,
	If( Is Missing( :Lot ID[i] ),
		:Lot ID[i] = :Lot ID[i - 1]
	)
);

Lot ID	Expected (Lot ID)
ID T41M06-21	ID T41M06-21
	ID T41M06-21
	ID T41M06-21
	ID T41M06-21
	ID T41M06-21
	ID T41M06-21
	ID T41M06-21
ID T41M06-22	ID T41M06-22
	ID T41M06-22
	ID T41M06-22
	ID T41M06-22
	ID T41M06-22
	ID T41M06-22
ID T41M06-23	ID T41M06-23
	ID T41M06-23
	ID T41M06-23
	ID T41M06-23
ID T41M06-24	ID T41M06-24

[#4]

Here are a couple of other ideas.

https://community.jmp.com/t5/JMP-Scripts/Fill-in-Missing-Cells/ta-p/21700

[#5]

This add-in has span cells feature plus a lot more.
https://community.jmp.com/t5/JMP-Add-Ins/Data-Table-Tools-Add-in/ta-p/28582