it is divide by zero error. I am sorry. I was way to drunk. Sorry everyone. 
 maybe we need to think about a better way of handling such error. 

On Thursday, 1 January 2015 03:16:22 UTC-5, Gustavo Goretkin wrote:
>
> Aren't you just dividing by zero? I don't know what it means for "both 
> arrays to contain (0,0)" but if there is an i,j such that X[i,j] == 0 && 
> Y[i,j] == 0, then sqrt(X.^2+
> Y.^2) will have a zero at i,j.
>
>
> On Thursday, January 1, 2015 2:30:55 AM UTC-5, Zahirul ALAM wrote:
>>
>> There is a NaN item at the very centre. How to deal with it?
>>
>> On Thursday, 1 January 2015 02:25:34 UTC-5, Zahirul ALAM wrote:
>>>
>>> any help please
>>>
>>> On Thursday, 1 January 2015 01:07:33 UTC-5, Zahirul ALAM wrote:
>>>>
>>>> may be not
>>>>
>>>> On Thursday, 1 January 2015 01:05:02 UTC-5, Zahirul ALAM wrote:
>>>>>
>>>>> I found the reason because both arrays contains (0, 0). Is there way 
>>>>> around it?
>>>>>
>>>>> On Thursday, 1 January 2015 00:50:56 UTC-5, Zahirul ALAM wrote:
>>>>>>
>>>>>> Happy new year!! 
>>>>>>
>>>>>> I am encountering a very odd fft error. I am trying fft NxN data. The 
>>>>>> data is produced using a mathematical equation. After debugging I have 
>>>>>> found that the following expression is gives NaN error:
>>>>>>
>>>>>> fft(besselj(1,  sqrt(X.^2+Y.^2))./sqrt(X.^2+Y.^2))
>>>>>>
>>>>>> where X and Y are Array{Float64,2}. 
>>>>>>
>>>>>> if I write fft(besselj(1,  sqrt(X.^2+Y.^2)) I get write answer. 
>>>>>> Seems like the division with the array is the issue. is issue. any idea 
>>>>>> why? is it a bug? 
>>>>>>
>>>>>

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