Re: [Rd] Bug in R evaluating a huge instruction (PR#14096)

From: Jean Couteau <couteau_at_codelutin.com>
Date: Wed, 02 Dec 2009 15:26:27 +0100

> FWIW the restriction is only on the console input - if you send it
> directly, there is no limit (I have never heard of nuiton-j2r but if
> you use rJava to interface from Java to R there is no limit - the
> string you parse+evaluate can be of any length).
Hi Simon,

nuiton-j2r is in fact an abstraction layer to rjava or rserve so that it can switch between one or other implementation using simple configuration (http://maven-site.nuiton.org/nuiton-j2r/ sorry but this is in french). And in fact I encounter the problem using it.

What is done is basically creating the R instruction from java and sending it to R using the eval method from the Rengine object (as we use jri in this specific application). The R instruction should create an object a of class morris, and I try then to get back the a$X object (the X item of the morris object) but I get back a null object without any reason, that is why I tried copying the instruction directly in R and thus getting this problem.

So that is strange if you say that there is no limit using rjava/jri.

Cheers,
Jean
>
> Cheers,
> Simon
>
>
>> Duncan Murdoch wrote:
>>> On 01/12/2009 12:50 AM, Jean Couteau wrote:
>>>> Thanks for your time Duncan,
>>>>
>>>> I join here the instruction that is not correct, hoping that might
>>>> help you. The file is encoded in utf-8 so you should not have any
>>>> problem reading it.
>>>>
>>>> I doubt to that it is an R bug too, but with all my tests i am less
>>>> and less sure of that.
>>>
>>> I have no problem sourcing that file, but I do get an error if I try
>>> to cut and paste it, because it's a single line of 4890 characters,
>>> and that's too long. So this is an R limitation, but it's one with
>>> an easy workaround: just add some line breaks into your source.
>>>
>>> Duncan Murdoch
>>>
>>>
>>>>
>>>> Best regards,
>>>> Jean Couteau
>>>>> Your message has encoding problems, so it's not readable. Could
>>>>> you put the code online somewhere where we could download it in
>>>>> its original form? I doubt if this is an R bug, but I can't point
>>>>> out the problem in your code (or confirm that it really is an R
>>>>> bug) without an undamaged copy of the code.
>>>>>
>>>>> Duncan Murdoch
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>>
>>
>> ______________________________________________
>> R-devel_at_r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>
>>
>
>



R-devel_at_r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel Received on Thu 03 Dec 2009 - 10:43:03 GMT

This archive was generated by hypermail 2.2.0 : Thu 03 Dec 2009 - 14:10:59 GMT