I figured out how to remove the  unwanted two lines.  I used the param 
called "connect" in plotDataItem. 
for more info read the PlotDataItem

Regards
 
On Friday, 17 March 2017 19:00:20 UTC-4, Rajab Legnain wrote:
>
>
> Thanks Sebastian for help.
> When I did what you told me, I got this. please look at the new photo. 
> The issue is that I  don't want a connecting line between the 
> discontinuous points. how to remove the line that marked by arrow.  
>
>
>
>
>
> On Friday, 17 March 2017 08:05:13 UTC-4, Sebastian Höfer wrote:
>>
>> Hi,
>>
>> the easiest way would be to unwrap your phase before plotting it. There 
>> is already a function for that in numpy:
>> https://docs.scipy.org/doc/numpy/reference/generated/numpy.unwrap.html
>> Per default it expects the data to be in radians, but it should be 
>> configurable to degrees or just convert it to radians before unwrapping.
>>
>> Regards
>> S
>>
>> Am Freitag, 17. März 2017 00:52:34 UTC+1 schrieb Rajab Legnain:
>>>
>>> Hello Every One
>>>
>>> I have a question, hoping someone has the answer.
>>>
>>>
>>>
>>> <https://lh3.googleusercontent.com/-nyNLCtC-QbY/WMskW2UnsRI/AAAAAAAACX8/Y5bG730UpIw4Y-04Xd0IVrM7IyOeK_bGgCLcB/s1600/plot.png>
>>>
>>> I am trying to create a graph for phase curves. This graph will wrap the 
>>> value if it is larger than 180 degree or smaller than -180.
>>>
>>> I have attached a photos shows what exactly I want to do.
>>>
>>>
>>> Thanks for help in advance.
>>>
>>>
>>>
>>> I 
>>>
>>> <https://lh3.googleusercontent.com/-nyNLCtC-QbY/WMskW2UnsRI/AAAAAAAACX8/Y5bG730UpIw4Y-04Xd0IVrM7IyOeK_bGgCLcB/s1600/plot.png>
>>>
>>>
>>> <https://lh3.googleusercontent.com/-nyNLCtC-QbY/WMskW2UnsRI/AAAAAAAACX8/Y5bG730UpIw4Y-04Xd0IVrM7IyOeK_bGgCLcB/s1600/plot.png>
>>>
>>>
>>>

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