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Appended is a list (as far as I can tell) of statistical software that DOES provide for use of Classification and Regression Tree (CART) models. Some have the CART as a trivial case of things like random-forests or gradient boosted machines.

What I want to know is, outside of these, what software does NOT provide for CART models.

EDIT:

The proprietary software used internally here (not Excel) does not support CART models. I am making a business case that, when performing ML tasks we need to have software that is capable. I really am looking for a lack of only this feature. I am looking for MAINSTREAM statistics GENERAL PURPOSE DATA ANALYSIS packages whose - something likely currently being used by a fortune 500 company to generate actionable results given input information. I am not looking for every mom-and-pop software package.

I am not asking if anyone could hand-code it in Haskell or Cobol. I'm asking if it is ALREADY in a PACKAGE for the software. R has a half-dozen packages. MatLab has one or two, but it requires a proprietary toolbox.

Outside of the Excel answer - I cannot think of or find a serious package not already accounted for.

If I made a mistake or omission here, please let me know.

As always, suggestions, corrections, comments and feedback are solicited.

Here is my best shot at an exhaustive list of Mainstream/production statistics software with established built-in CART implementations:

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closed as too broad by gung, Glen_b, Sycorax, whuber Jan 12 '15 at 14:58

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ I don't know if there is a point in making a list of software that does not do something. Do you really want to list all the "t-test calculators" that float around the web in thousands..? $\endgroup$ – Tim Jan 12 '15 at 14:18
  • $\begingroup$ @Tim - see the updated (EDIT) section. $\endgroup$ – EngrStudent Jan 12 '15 at 15:46
  • $\begingroup$ Minitab, AFAIK, doesn't currently implement any tree-based methods. $\endgroup$ – Scortchi Jan 12 '15 at 16:26
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    $\begingroup$ List-of-lists questions are generally not on topic here. One useful way to present your research would be in our meta thread on support for software. $\endgroup$ – whuber Jan 12 '15 at 16:26
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    $\begingroup$ @EngrStudent - "mainstream" also does not make much sens still: Gephi is a "mainstream" software for social network analysis, Stan is "mainstream" for Bayesian estimation, Ggplot is "mainstream" for plotting - all of them are "mainstream" and "statistical" while you won't even expect cart to be implemented in them. It is like asking about "all mainstream politicians that don't have blue eyes": the answer depends on (a) what "mainstream" is and (b) is possibly unlimited. $\endgroup$ – Tim Jan 12 '15 at 17:09
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As a general rule, whenever you're looking for software without a particular function, Excel is a good place to start.

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    $\begingroup$ Lol. This is a beautiful answer. $\endgroup$ – EngrStudent Jan 12 '15 at 14:19

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