turn on suggestions

Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

Showing results for

- JMP User Community
- :
- Discussions
- :
- Who can help to optimize a basic function for comp...

Topic Options

- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Get Direct Link
- Email to a Friend
- Report Inappropriate Content

Dec 15, 2014 1:18 PM
(396 views)

Hello All,

I am looking for some advise from more experienced JMP users for the following problem.

I frequently need to work with a data tables that contain up to 4 rows per unit. However some of the system parameters are only recorded for the first enry of an individual unit although applicable for the other rows associated to that unit as well.

In order to be able to analyze and group the data I need these system parameters to be completed for all rows of an unit.

As I have no chance to alter the data recording to the database I need to take care of this after data base extraction before any analysis.

I therefore created a workaround as shown below.

It provides the desired result but is very slow and actually not feasible for data tables with more than 1000 rows.

dt = Current Data Table();

dt<<Sort(By(:unit), Order(Ascending), Replace Table);

:param_1 << Formula (for each row(:param_1 [row()+1] = (if (:unit[row()] == :unit [row()+1],

:param_1 [row()], :param_1 [row()+1] )),

),

Eval Formula

);

I am sure there is a more efficient and elegant way to solve this problem, but I have to admit that my skills are very limited.

I appreciate any input from more experienced users.

Thanks,

Lutz

3 REPLIES

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Get Direct Link
- Email to a Friend
- Report Inappropriate Content

Dec 15, 2014 1:32 PM
(307 views)

Try this code. It assumes that you have a two-column table with one column called Unit and the other called Param_1. I didn't do any performance testing, but this might zip through your table pretty quickly. Only sets values if it has to.

dt = New Table**(** "Unit-Param Example",

Add Rows**(** **16** **)**,

New Column**(** "Unit",

Character,

Nominal,

Set Values**(**

**{**"a", "a", "a", "a", "b", "b", "b", "b", "c", "c", "c", "c", "d", "d",

"d", "d"**}**

**)**

**)**,

New Column**(** "Param_1",

Numeric,

Continuous,

Format**(** "Best", **12** **)**,

Set Values**(** **[****32**, **32**, **32**, **32**, **25**, **.**, **.**, **.**, **.**, **14**, **.**, **.**, **.**, **.**, **13**, **.]** **)**

**)**

**)**;

// Sort by unit and parameter, so that if any are missing they're in positions 2, 3, 4 of a set

dt << **Sort(**By**(**:unit, :param_1**)**, Order**(**Ascending, descending**)**, Replace Table**)**;

// Get the first row values

old_unit = dt:unit**[****1]**;

old_param = dt:param_1**[****1]**;

for **(**i = **2**, i <= nrows**(**dt**)**, i++,

one_unit = dt:unit**[**i**]**;

one_param = dt:param_1**[**i**]**;

if **(**one_unit == old_unit & is missing**(**one_param**)**,

dt:param_1**[**i**]** = old_param;

**)**;

if **(**one_unit != old_unit,

old_unit = one_unit;

old_param = dt:param_1**[**i**]**;

**)**;

**)**;

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Get Direct Link
- Email to a Friend
- Report Inappropriate Content

Dec 15, 2014 1:52 PM
(307 views)

Tested my code against a 40,000 row table and it returned in less than a second.

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Get Direct Link
- Email to a Friend
- Report Inappropriate Content

Dec 15, 2014 10:54 PM
(307 views)

Thanks a lot. Will test the code first thing in office today.