[ncl-talk] Limiting X-axis for a line in the Spectrum analysis

[S Br]

Hi Rick,
To calculate spectrum we need full length of data which is about 500 years.
Which parameter do you ask me to _FillValue for years greater than 40?

Thanks.
SB

On Fri, Jun 28, 2019 at 5:17 PM Rick Brownrigg <brownrig at ucar.edu> wrote:

> I don't know for certain, but what about setting the data for the 3rd line
> to _FillValue for years greater than 40?
>
> Rick
> On Fri, Jun 28, 2019 at 10:02 AM S Br via ncl-talk <ncl-talk at ucar.edu>
> wrote:
>
>> Hi All,
>> I have generated the attached spectrum analysis with three series of
>> data. I have used overlay to plot three lines for this figure. In this, the
>> X-axis ranges from 0 to 100. However, I don't want to show one of the
>> spectrum line (e.g. Var3) beyond year 40. The first two series should show
>> the spectrum with the X-axis 0 to 100 year but third spectrum line should
>> plot up to year 40 (not beyond that).
>>
>> I have tried by limiting the X-axis as shown below but doesn't work.
>>
>>  res = True                                      ; no plot mods desired
>>    res at gsnDraw                =  False
>>    res at gsnFrame               =  False
>>    res at trYMinF              = 0                 ; manually set lower
>> limit Y axis
>>    res at trYMaxF              = 15             ; manually set upper limit
>> Y axis
>>    res at trXMinF              = 0                 ; manually set lower
>> limit X axis
>>    res at trXMaxF              = 100             ; manually set upper
>>
>>   res at xyLineColors        = (/"green4"/) ; Line colours (white-to
>> invisible the markov line)
>>    plot(0) = gsn_csm_xy(wks, p1, spec1 at spcx, res)
>>    delete(res at gsnCenterString)    ; no center string for the following
>> plot
>>    delete(res at gsnLeftString)    ; no center string for the following plot
>>    res at xyLineColors        = (/"red"/) ; Line colours (white-to
>> invisible the markov line)
>>    plot2 = gsn_csm_xy(wks, p2, spec2 at spcx, res)
>>
>>    delete(res at trXMinF)
>>    delete(res at trXMaxF)
>>    res at trXMinF              = 0                 ; manually set lower
>> limit X axis
>>    res at trXMaxF              = 40             ; manually set upper limit
>> X axis
>>    res at xyLineColors        = (/"blue"/) ; Line colours (white-to
>> invisible the markov line)
>>    plot3 = gsn_csm_xy(wks, p3, spec3 at spcx, res)
>>
>>    overlay(plot(0),plot2)
>>    overlay(plot(0),plot3)
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> Thank you.
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