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twillkickers
Community Trekker

Sum only selected rows of a column

Is there an easy way to sum only the selected rows of a column and save the value to a global variable?

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1 ACCEPTED SOLUTION

Accepted Solutions
txnelson
Super User

Re: Sum only selected rows of a column

::myGlobalVariable = Col Sum( If( Selected(), :height, . ) );
Jim
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6 REPLIES 6
txnelson
Super User

Re: Sum only selected rows of a column

Here is a simple script to do what you want

Names Default To Here( 1 );
dt = Open( "$SAMPLE_DATA/big class.jmp" );
dt << set table variable( "my variable", Col Sum( If( Selected(), :height, . ) ) );
Jim
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twillkickers
Community Trekker

Re: Sum only selected rows of a column

How is this type of variable called? I can't call it using ::my variable

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uday_guntupalli
Community Trekker

Re: Sum only selected rows of a column

@twillkickers
        They are referenced the same way you would reference a column 

 

dt = Open( "$SAMPLE_DATA/big class.jmp" );
dt << Select Randomly(0.1); 
dt << set table variable( "myvariable", Col Sum( If( Selected(), :height, . ) ) );

Print(:myvariable);
Best
Uday
txnelson
Super User

Re: Sum only selected rows of a column

::myGlobalVariable = Col Sum( If( Selected(), :height, . ) );
Jim
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twillkickers
Community Trekker

Re: Sum only selected rows of a column

Thank you. This works for me. Is there a function similar to "set table variable" which sets the value as a global variable? (:: instead of :) I am having to take the table variable and save it as a global variable to do my calculations.
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dale_lehman
Community Trekker

Re: Sum only selected rows of a column

If you want to do this without using a script, first select the rows (using whatever method you want).  Then, under Rows-Select-Name selection in column, you create a column of 0 and 1 that identifies the selected rows.  Then create a new column using the Column Sum formula and put the newly created Named selection in column as the By variable.  The result will show the sum for the selected and unselected rows.

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