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From Matthias Boehm <mboe...@googlemail.com>
Subject Re: [QUESTION] XOR operations in SystemML. Thanks.
Date Mon, 04 Sep 2017 22:46:12 GMT
Could we please stick to R syntax (i.e., "xor(a, b)") here, unless there is
a good reason to deviate? Thanks.

Regards,
Matthias

On Mon, Sep 4, 2017 at 7:55 AM, Janardhan Pulivarthi <
janardhan.pulivarthi@gmail.com> wrote:

> Hi all, [XOR symbol]
>
> Now, I gave a sample try for the XOR operator, with caret ` ^ ` symbol.
> But, this have been reserved for exponentiation. So, another alternative
> would be
>
> 1. ` (+) `
> 2. ` >< `
> 3. ` >-< `
>
> Thanks,
> Janardhan
>
> On Thu, Aug 31, 2017 at 7:38 PM, Matthias Boehm <mboehm7@googlemail.com>
> wrote:
>
>> From a scalar operation perspective, you could of course emulate XOR via
>> AND, OR, and negation. However, you might want to write anyway a java-based
>> UDF to efficiently implement this recursive operator.
>>
>> Down the road, we can think about a generalization of our existing
>> cumulative operations such as cumsum, cumprod, cummax, to arbitrary cell
>> computations and aggregation functions, which would be useful for quite a
>> number of applications.
>>
>> Regards,
>> Matthias
>>
>> On Thu, Aug 31, 2017 at 5:59 AM, Janardhan Pulivarthi <
>> janardhan.pulivarthi@gmail.com> wrote:
>>
>>> Hi,
>>>
>>> The following is an equation (2.4) from the algorithm for the generation
>>> of sobol sequences. The authors of the paper have utilized the bitwise
>>> operations of C++ to calculate this efficiently.
>>>
>>> *Now, the question is:* Can we do this at script level (in dml) or we
>>> should do it in the `java` itself as a builtin, function to generate the
>>> numbers?.
>>>
>>>
>>> ‚Äč
>>> Thanks,
>>> Janardhan
>>>
>>
>>
>

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