topic Re: Column Formula to display difference between two rows of another column in Discussions

Column Formula to display difference between two rows of another column

chivukula — Wed, 04 May 2011 17:05:54 GMT

My data set is-

Vg Ig Igs
0 1 1
1 5 4
2 7 2
3 3 -4

I would like to create column Igs which is difference between current row and previous row in the column Ig. Is it possible script something like this in jmp.

Thank you

Chivukula

Re: Column Formula to display difference between two rows of another column

mattf — Fri, 06 May 2011 12:49:55 GMT

Hi:

Perhas this is one way:

Re: Column Formula to display difference between two rows of another column

Fri, 06 May 2011 20:27:41 GMT

You can use the LAG function:

New Column( "lgs",
Numeric,
Continuous,
Formula( AsColumn("lg") - Lag( AsColumn("lg"), 1 ) ),
)

Re: Column Formula to display difference between two rows of another column

mpb — Sat, 07 May 2011 02:52:03 GMT

Or this using the DIF function:

New Column( "lgs",
Numeric,
Continuous,
Formula( Dif( :lg, 1 ) )
)

If you are working interactively you can just create a new column and use the formula builder to enter the formula Dif(:lg, 1)

Michael

Re: Column Formula to display difference between two rows of another column

chivukula — Thu, 12 May 2011 14:45:14 GMT

Thank you so much for helping.

Regards,
Chivukula

Saving results from log window using JSL

chivukula — Mon, 06 Jun 2011 19:06:51 GMT

Hello:

I am using bivarate plot and adding a fit line. I would like to save slope and intercept values in a text file. I am using following code:

biv=rbiv<Ex1=biv[NumberColBox(13)][2];
show(Ex1);

Show(Ex1) show the value of slope in the log file along with the log of entire session. Is it possible to send JSL command to save the values of just slopes and intercepts in to a new data table or seperate text file from the log.

Thank you

Regards,
Chivukula

Re: Column Formula to display difference between two rows of another column

Srishti — Sat, 02 Feb 2019 01:05:08 GMT

Both the solutions given here work well. I have data that is similar, but in a date format. I want to calculate the difference between rows where the differences are in units such as 'day' or 'year' or 'week' or 'months'. Is there a way to do this?

Re: Column Formula to display difference between two rows of another column

txnelson — Sat, 02 Feb 2019 02:14:28 GMT

Look into the Scripting Index for the function

Date Difference()

Help==>Scripting Index