IBM Data & AI

Welcome to the idea forum for IBM Data & AI (Formerly Analytics) Clients! 


IBM Employees:

The correct URL for entering your ideas is



Our team welcomes any feedback  and suggestions you have for improving our offerings / products!  This forum allows us to connect your offering / product improvement ideas with IBM product and engineering teams.


If you have not registered on this portal please click on the following link and register.  To complete registration you will need to open the email you will receive from Aha to confirm your identity.


On restrictions on String variables used for 'Grouping Valiable' of 'Independent-Samples T test'

About 'Grouping Valiable' of 'Independent-Samples T test'.
Improvement request
I would like to use Long String (eg 24 bytes) as 'Grouping Valiable'.

In the case of String variable, only variables that variable width is 8 or less can be input to [Grouping Variable].
If you use a variable width of 8 or more, the following warning will be displayed.

The GROUPS subcommand specifies an unknown variable or a long string variable.
This subcommand must specify either a numeric variable or a short string variable.
Text found: variable name

The description of OnlineHepl has the following description.
Independent-Samples T Test

Data. The values of the quantitative variable of interest are in a single column in the data file.
The procedure uses a grouping variable with two values to separate the cases into two groups.
The grouping variable can be numeric (values such as 1 and 2 or 6.25 and 12.5) or short string (such as yes and no).

Currently, 'Grouping Valiable' can only input Short string. I would like to use Long String (eg 24 bytes) as 'Grouping Valiable'.

When the character code is alphabet (ascii)
If the character width is 8tytes, meaningful contents can be expressed.

In case of character code, Japanese (UTF-8)
If the character width is 8 bytes, only two characters can be used.
With 2 characters, it is difficult to express the content, so we request improvement of the specification.

  • Jan 11 2019
  • Needs review
Customer Name
Role Summary
  • Attach files

NOTICE TO EU RESIDENTS: per EU Data Protection Policy, if you wish to remove your personal information from the IBM ideas portal, please login to the ideas portal using your previously registered information then change your email to "anonymous@euprivacy.out" and first name to "anonymous" and last name to "anonymous". This will ensure that IBM will not send any emails to you about all idea submissions