topic Re: Count the number of zeroes in a column (JSL) in Discussions

Count the number of zeroes in a column (JSL)

warnost — Wed, 27 Feb 2013 23:03:52 GMT

Hi,

I have been using the Distribution platform to manually analyze a data set, but since I will have to repeat I am now trying to create a JSL script to extract the measures that are most important. The data looks like this:

Model Score

MODEL1 3.54485

MODEL2 2.36485

MODEL1 5.38456

MODEL2 2.14556

MODEL1 0

MODEL2 0.04856

I would like to extract the mean, std dev, etc. but also I would like to know how often the score is zero for each model. I have tried using summary, tabulate, and a few functions in JSL. I can accomplish everything but the "count zeroes" portion. I can get this number manually by creating the distribution and then doing histogram options >> show counts. Any ideas on how to do it in JSL? Code so far:

dt = Open("C:\Desktop\Results.jmp);

dt << Summary(

Group( :Model ),

Median( :score ),

Mean( :score ),

Std Dev( :score ),

Range( :score ),

);

Re: Count the number of zeroes in a column (JSL)

Anonymous — Thu, 28 Feb 2013 09:12:49 GMT

You can use the summary command and see the counts by grouping on score:


Data Table("Untitled") << Summary(Group(:Score))

or in jsl you could do:


zero_count = 0;


for each row(

    if(:score == 0, zero_count++)

);


show(zero_count);

Re: Count the number of zeroes in a column (JSL)

warnost — Thu, 28 Feb 2013 15:42:54 GMT

Thank you! I am sure the code below is less than optimal, but I was able to incorporate your code to get the result I wanted.

filename = ""; /*general name so I can repeat for different files*/

dt = Open("C:\Desktop\results1" || filename || ".jmp");

zero_count = 0;

for each row(

if(:score == 0 & :Model == "Model1", zero_count++)

);

dt << Summary(

Group( :Model ),

Median( :score ),

Mean( :score ),

Range( :score ),

);

dt2 = Data Table( "results1" || filename || " By (Model)" );

dt2 << Delete Rows(2); /*I only want Model1 */

dt2 << New Column( "Num Zeroes",

Numeric,

Continuous,

Format( best),

<<set each value( zero_count ),

);

Re: Count the number of zeroes in a column (JSL)

ms — Thu, 28 Feb 2013 16:17:46 GMT

Here is a sligtly simplified version that should give the same result.

dt = Open( "C:\Desktop\results1" || filename || ".jmp" );

dt2 = dt << Summary( Group( :Model ), Median( :score ), Mean( :score ), Range( :score ) );

dt2 << Delete Rows( 2 ) << New Column( "Num Zeroes",

Numeric,

Continuous,

Format( best ),

<<set each value( N Rows( dt << get rows where( :score == 0 & :Model == "Model1" ) ) )

);

Re: Count the number of zeroes in a column (JSL)

warnost — Thu, 28 Feb 2013 16:46:12 GMT

Thank you! This is much cleaner.