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
- :
- Missing value codes not working in functions?

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

Mar 11, 2016 4:45 AM
(911 views)

Hi All,

I was wondering what is the best practice for finding the listwise missing observations in a set.

I was using the “Is Missing” function in order to indicate missing observations. Yet the result was somewhat disappointing since it does not take into account missing value codes. Apparently, the missing value codes only works with platforms.

For example:

dt = Open**(** "$SAMPLE_DATA/Big Class.jmp" **)**;

// set a missing value

:weight**[****1]** = **.**;

// set missing value codes

:weight << **set property** **(**"Missing Value Codes", -**1)**;

// set a missing category observation

:weight**[****2]** = -**1**;

// new column indicating missing values for weight

dt << **new column** **(**"Missing", formula**(**If**(**Is Missing**(**:weight**)**, **1**, **0)))**;

The new column indicates row 1 as missing while not so for row 2.

Thanks,

Ron

1 ACCEPTED SOLUTION

Accepted Solutions

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

Solution

FWIW, in the JMP 13 build I have row 2 is indicated as missing by the formula column.

Regarding best practice in an earlier release, I guess that depends on the details. As you know you could write a JSL function to scan for the 'Missing Value Codes' property and respond accordingly. Perhaps this could also be put into a formula.

4 REPLIES

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

FWIW, in the JMP 13 build I have row 2 is indicated as missing by the formula column.

Regarding best practice in an earlier release, I guess that depends on the details. As you know you could write a JSL function to scan for the 'Missing Value Codes' property and respond accordingly. Perhaps this could also be put into a formula.

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

Mar 11, 2016 10:22 AM
(780 views)

thanks Ian@JMP

i am using JMP 11 so it didn't work for me. good to know it is already fixed in more recent versions.

i may consider just deleting the missing value codes since i do not distinguish between them and actual missing values.

ron

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

Mar 11, 2016 7:12 AM
(780 views)

What version of JMP are you using?

JMP 12 recognizes the missing value as defined by the Missing Value Codes property. The screen shot below is what I get after running your script.

By the way, if you ever want to get the actual value you can use Col Stored Value().

-Jeff

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

Mar 11, 2016 10:23 AM
(780 views)