JSL: Select Where with variable for column name

elizperez — Tue, 01 Apr 2014 21:37:33 GMT

Hi I'm trying to use select where to count the number of rows which meet criteria in 2 columns using a for loop. In the beginning of my script (not shown) I use a dialog to let the user choose 2 columns and this ends up in a list (collist). I then use an associative array on each to determine the unique values per column. A second dialog allows the user to choose a subset of those unique values per column which ends up in another list (poschosen). The problem I'm struggling with is inserting the columns from collist into the select where function. I've tried a bunch of different attempts at eval, expr, eval expr, parse, etc. to try to insert them appropriately but I just can't seem to find the correct way. I'm hoping someone has advice.

Here is my code adapted for the Sample Data: Children's Popularity. I'd like to replace the values (line 14) School and Goals to be collist[1] and collist[2] respectively. Thank you for your help in advance Elizabeth


dattable=Open( "$SAMPLE_DATA/Children's Popularity.jmp" );

poschosen={"Ridge","Sand","main","stop","Popular","Grades","stop"};

stoppos={4,7}; //determine the position of the separator "stop"

Test1pos=subtract(stoppos[1],1); //determine the # of school column values chosen

Test2posStart=add(stoppos[1],1); //determine where in the list the Goals column values start



collist={"School", "Goals"};

sumpositives=0;

For (i = 1, i <= Test1pos, i++, //loop through the chosen school column values



For(f=Test2posStart, f<stoppos[2],f++, //loop through the chosen Goals column values

dattable<<select where(School==poschosen & Goals==Poschosen);

num_selected=nrows(dattable<<get selected rows); //count the rows selected



sumpositives=sumpositives+num_selected; //add the current selection count to previous count

print(sumpositives); //should be 56 in this example

); //end of inner for loop

); //end of outer for loop

Re: JSL: Select Where with variable for column name

elizperez — Tue, 01 Apr 2014 21:42:12 GMT

Nevermind I just figured it out (of course right after I post the question, doh)... line 14 works when I do this:

dattable<<select where(as column(dattable,collist[1])==poschosen & as column(dattable,collist[2])==Poschosen);

Re: JSL: Select Where with variable for column name

kwtorek0 — Mon, 29 Aug 2016 22:56:54 GMT

I've been trying forever to figure this one out, finally found this thread. Thank you!

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JSL: Select Where with variable for column name

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Re: JSL: Select Where with variable for column name