[ncl-talk] Segmentation fault
Amadou Coulibaly
mpapin24 at gmail.com
Sun May 24 23:23:12 MDT 2015
Hi Dennis and Rick,
I have been able to plot one my wavelet spectrum using 5 years of hourly
data, instead of all the 30 years, which were bringing the following error
message: Segmentation fault (core dumped).
But I till have some warring and errors messages such as:
warning:_NhlCreateSplineCoordApprox: Attempt to create spline approximation
for X axis failed: consider adjusting trXTensionF value
warning:IrTransInitialize: error creating spline approximation for
trXCoordPoints; defaulting to linear
warning:_NhlCreateSplineCoordApprox: Attempt to create spline approximation
for X axis failed: consider adjusting trXTensionF value
warning:IrTransInitialize: error creating spline approximation for
trXCoordPoints; defaulting to linear
warning:XyPlotSetValues:xyYStyle is NhlLOG:trYMinF can't be <= 0.0:Setting
xyComputeYMin to True
fatal:ContourPlotDraw: Workspace reallocation would exceed maximum size
100000000
fatal:ContourPlotDraw: draw error
fatal:ContourPlotDraw: draw error
fatal:PlotManagerDraw: error in plot draw
fatal:_NhlPlotManagerDraw: Draw error
I saw somewhere that to solve the first fatal (fatal:ContourPlotDraw:
Workspace reallocation would exceed maximum size 100000000), I must change
that maximum size 100000000 to *wsMaximumSize : 500000000 in the
file:.hluresfile and put it in my home directory. I don't understand how to
put it in my home directory?
How to solve the issues of those errors?
Best
On 23 May 2015 at 19:09, Dennis Shea <shea at ucar.edu> wrote:
> [1] If your data has missing values, you can not use either specx_anal or
> the wavelet tool.
>
> [2] http://www.ncl.ucar.edu/Document/Functions/Built-in/dtrend.shtml
>
> states: "Missing values (_FillValue) are not allowed."
>
> [3] If there are **isolated** missing values you could likely do a simple
> linear interpolation
> to fill them. However, **any** interpolation will affect the spectra.
>
> If you have many _FillValue .... I would not even try to fill them in.
> The resulting spectra will reflect the effects of the interpolation
> as much as the 'rea;' data.
>
> ---
> Punch line: I don't think you can get what you want ... given your data.
>
> --
>
> Your statement:
>
> "My script is from this link:
> http://paos.colorado.edu/research/wavelets/
>
> There is no NCL script at that web site.
>
> In fact, NCL call the fortran code presented at the website.
>
> ---
> The interactive code there is IDL ... not NCL
>
> Regards
>
>
>
> On Sat, May 23, 2015 at 9:54 AM, Amadou Coulibaly <mpapin24 at gmail.com>
> wrote:
>
>> Hi Dennis,
>>
>> My script is from this link:
>> http://paos.colorado.edu/research/wavelets/
>>
>> My Temp look like this:
>>
>> Variable: Temp
>> Type: float
>> Total Size: 1051968 bytes
>> 262992 values
>> Number of Dimensions: 1
>> Dimensions and sizes: [time | 262992]
>> Coordinates:
>> time: [410227200..1356994800]
>> Number Of Attributes: 7
>> coordinates : lon lat
>> grid_type : unstructured
>> comment : Air temperature is the bulk temperature of the air, not
>> the surf
>> ace (skin) temperature.
>> shortname : ta
>> code : 11
>> units : K
>> _FillValue : 9.96921e+36
>> (0) 299.15
>> (1) 9.96921e+36
>> (2) 9.96921e+36
>> (3) 296.35
>>
>> It contains a lot of missing data. That's why I used the following
>> command:
>> ; Remove mean and linear trend (recommended, not required)
>> ; Missing values are not allowed.
>> ;************************************
>> Temp = dtrend(Temp,False)
>>
>> After that I printed Temp, but look stange for me with negative values:
>>
>> Variable: Temp
>> Type: float
>> Total Size: 1051968 bytes
>> 262992 values
>> Number of Dimensions: 1
>> Dimensions and sizes: [time | 262992]
>> Coordinates:
>> time: [410227200..1356994800]
>> Number Of Attributes: 7
>> coordinates : lon lat
>> grid_type : unstructured
>> comment : Air temperature is the bulk temperature of the air, not
>> the surf
>> ace (skin) temperature.
>> shortname : ta
>> code : 11
>> units : K
>> _FillValue : 9.96921e+36
>> (0) -8.256236e+36
>> (1) 1.713005e+36
>> (2) 1.713035e+36
>> (3) -8.256145e+36
>>
>> I think the problem is from that command trying to remove mean and linear
>> trend. Because without that I can get the wavelet function (w), but it
>> contains only zero as values.
>>
>> How to handle this issue?
>>
>> Best
>>
>>
>> On 23 May 2015 at 14:17, Dennis Shea <shea at ucar.edu> wrote:
>>
>>> [1] I have no idea why the script should seg fault. Maybe your parameter
>>> settings are not appropriate for the input data.
>>>
>>> [2] What does "Temp" look like? printVarSummary(Temp)
>>>
>>> [3] Are there missing values?
>>>
>>> [4] If you want the "power spectrum", why not look at
>>>
>>> http://www.ncl.ucar.edu/Document/Functions/Built-in/specx_anal.shtml
>>> http://www.ncl.ucar.edu/Applications/spec.shtml
>>>
>>> Good luck
>>>
>>> On Sat, May 23, 2015 at 8:00 AM, Amadou Coulibaly <mpapin24 at gmail.com>
>>> wrote:
>>>
>>>> Dear ncl users,
>>>>
>>>> When I tried ti run my script (wavelet1.ncl), I am getting a strange
>>>> error which is:
>>>> Segmentation fault (core dumped)
>>>>
>>>> I am using ncl.6.2.1 and my system is: Linux amadou-Satellite-C855
>>>> 3.19.0-16-generic #16-Ubuntu SMP Thu Apr 30 16:09:58 UTC 2015 x86_64 x86_64
>>>> x86_64 GNU/Linux
>>>>
>>>> My dataset contains hourly data (1983-2012) of wind(speed/direction),
>>>> air_temperature, ... for 46 sites. I just wanted to plot the power spectrum
>>>> of only one site and for the all 30 years. I think the error comes from
>>>> line 45 when I tried to compute the wavelet function (w). Please find
>>>> attached my script.
>>>>
>>>> How can I solve this issue?
>>>>
>>>>
>>>> --
>>>> * COULIBALY AMADOU *
>>>> PhD Student on West African Climate System (WACS)
>>>> FUTA - Federal University of Technology of Akure, Nigeria
>>>>
>>>> *Visiting Student - *
>>>> *University of Cologne, Germany**Institute of Geophysics and
>>>> Meteorology*
>>>> Pohligstr. 3 / Office 3.102
>>>> D-50969 Köln
>>>>
>>>> *Project*: WASCAL (West African Science Service Centre on Climate Change
>>>> and Adapted Land Use)
>>>> Phone:(+234) 810 795 2836 /(+223) 65 67 27 57 /(+226) 64 57 37 27 /+49
>>>> 15218352574
>>>>
>>>> E-mail: mpapin24 at gmail.com / coulibalya68 at yahoo.com
>>>>
>>>> "*The time is always right to do right": Nelson Mandela*
>>>>
>>>> *"Character is like a tree and reputation like a shadow. The shadow is
>>>> what we think of it; the tree is the real thing" : Abraham Lincoln*
>>>>
>>>> *"Do what you can, with what you have, where you are" Theodore
>>>> Roosevelt*
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> ncl-talk mailing list
>>>> List instructions, subscriber options, unsubscribe:
>>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>>>
>>>>
>>>
>>
>>
>> --
>> * COULIBALY AMADOU *
>> PhD Student on West African Climate System (WACS)
>> FUTA - Federal University of Technology of Akure, Nigeria
>>
>> *Visiting Student - *
>> *University of Cologne, Germany**Institute of Geophysics and Meteorology*
>> Pohligstr. 3 / Office 3.102
>> D-50969 Köln
>>
>> *Project*: WASCAL (West African Science Service Centre on Climate Change
>> and Adapted Land Use)
>> Phone:(+234) 810 795 2836 /(+223) 65 67 27 57 /(+226) 64 57 37 27 /+49
>> 15218352574
>>
>> E-mail: mpapin24 at gmail.com / coulibalya68 at yahoo.com
>>
>> "*The time is always right to do right": Nelson Mandela*
>>
>> *"Character is like a tree and reputation like a shadow. The shadow is
>> what we think of it; the tree is the real thing" : Abraham Lincoln*
>>
>> *"Do what you can, with what you have, where you are" Theodore Roosevelt*
>>
>>
>>
>>
>>
>>
>
>
--
* COULIBALY AMADOU *
PhD Student on West African Climate System (WACS)
FUTA - Federal University of Technology of Akure, Nigeria
*Visiting Student - *
*University of Cologne, Germany**Institute of Geophysics and Meteorology*
Pohligstr. 3 / Office 3.102
D-50969 Köln
*Project*: WASCAL (West African Science Service Centre on Climate Change
and Adapted Land Use)
Phone:(+234) 810 795 2836 /(+223) 65 67 27 57 /(+226) 64 57 37 27 /+49
15218352574
E-mail: mpapin24 at gmail.com / coulibalya68 at yahoo.com
"*The time is always right to do right": Nelson Mandela*
*"Character is like a tree and reputation like a shadow. The shadow is
what we think of it; the tree is the real thing" : Abraham Lincoln*
*"Do what you can, with what you have, where you are" Theodore Roosevelt*
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