topic Re: Deleting rows using JSL scripts in Discussions

Deleting rows using JSL scripts

asvp — Mon, 06 Dec 2010 22:02:00 GMT

How can we delete rows from a data table (using JMP script) when some columns in this data table satisfy a particular criteria?

Using Delete Rows is not working for me in my script.

Thanks

Re: Deleting rows using JSL scripts

ms — Wed, 04 Jan 2017 17:59:41 GMT

Here is one way to do it.

dt = Current Data Table();
For Each Row( Row State() = Selected State( criteriacolumn[] == criteria ) );
dt << delete rows();

Re: Deleting rows using JSL scripts

asvp — Mon, 06 Dec 2010 22:39:32 GMT

Thanks MS, it works.

Re: Deleting rows using JSL scripts

pmroz — Wed, 04 Jan 2017 18:00:04 GMT

Here's another way. I don't know if it's any faster.

dt << select where(:N < min_case_value);
dt << delete rows;

Re: Deleting rows using JSL scripts

mpb — Tue, 07 Dec 2010 21:26:25 GMT

> Here's another way. I don't know if it's any
> faster.

Well I made a table with 6 columns and 100,000 rows and the For solution took about 1 second and the direct select took "0" seconds.

When I increased the number of rows to 1,000,000 then the For solution took 11 or 12 seconds and the direct select took 3 seconds.

So on my pc running winXP using this particular table the direct select is about 4 times faster but you would need a really large table to notice the difference.

Michael

Re: Deleting rows using JSL scripts

ms — Wed, 08 Dec 2010 08:23:29 GMT

Thanks!

Fast is good. The direct method has also the advantage that easier to read (and remember).

The loop method still is useful when you need to set other or combined row states.