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- Column Formula to display difference between two rows of another column

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May 4, 2011 10:05 AM
(6319 views)

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

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

1 ACCEPTED SOLUTION

Accepted Solutions

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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

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

7 REPLIES

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

Hi:

Perhas this is one way:

Perhas this is one way:

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

You can use the LAG function:

New Column( "lgs",

Numeric,

Continuous,

Formula( AsColumn("lg") - Lag( AsColumn("lg"), 1 ) ),

)

New Column( "lgs",

Numeric,

Continuous,

Formula( AsColumn("lg") - Lag( AsColumn("lg"), 1 ) ),

)

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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

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

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?

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

Look into the Scripting Index for the function

Date Difference()

Help==>Scripting Index

Jim

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

Thank you so much for helping.

Regards,

Chivukula

Regards,

Chivukula

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Saving results from log window using JSL

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

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<

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