[ncl-talk] printing spi
Dennis Shea
shea at ucar.edu
Mon Apr 10 07:11:25 MDT 2017
Generally, i s recommended that you write a script with NCL commands; then
execute the script.
%> ncl dawit.ncl
Why? NCL's interactive environment is not as 'friendly' in error recovery
as in other tools.
On Mon, Apr 10, 2017 at 7:05 AM, Guido Cioni <guidocioni at gmail.com> wrote:
> Sorry I didn't follow the whole conversation so you would have to send me
> the entire script for me to check...
>
> What do you mean by "failed to return the graph"? You get no error or
> warning and no file is produced?
> Try with the x11 workstation before using the postscript one so that you
> can easily debug any issue in the script beforehand.
>
>
> Guido Cioni
> http://guidocioni.altervista.org
>
> On 10 Apr 2017, at 15:01, Dawit Abebe <dawit.kan at gmail.com> wrote:
>
> Dear Guido,
>
> What a shame of myself!
>
> Thanks Guido. I did the correction and went through smoothly but the last
> command failed to return the graph (4 one side and 3 on the other side in
> one plot). What do you that I missed to complete this?
>
> Thanks again
> …………………………………...
>
> ncl 109> do k=0,klen-1
>
> ncl 110> res at xyLineColors = xyLineColors(k)
>
> ncl 111> res at gsnCenterString = "len="+klen(k)
> ncl 112> plt(k) = gsn_csm_xy (wks, yrfrac, spi(k,:), res)
> ncl 113> end do
> ncl 114> resP = True
> ncl 115> resP at txString = "SPI: Southern Ethiopia 1901-2014"
> ncl 116> resP at gsnMaximize = True
> ncl 117> gsn_panel (wks,plt,(/4,2/), resP)
>
> ………………….
>
>
> On Apr 10, 2017, at 3:39 PM, Guido Cioni <guidocioni at gmail.com> wrote:
>
> There is a typo in your code. It should be xyLineColors and
> not xyLineColours.
> See here https://www.ncl.ucar.edu/Document/Graphics/Resources/xy.shtml.
>
> (Look closely at the warning/error messages that you are receiving: most
> of the times they can help you a lot in identifying the problem)
>
> Hope that helps
>
> Guido Cioni
> http://guidocioni.altervista.org
>
> On 10 Apr 2017, at 14:26, Dawit Abebe <dawit.kan at gmail.com> wrote:
>
> Dear Dennis and all
>
> I’m sorry for bothering you all but tried to do xy plot of spi following
> example 1but failed. You hinted in your email below that I should change
> the spi array but could not figure out how to do thi. I tried the following
> but could not able to continue after some step. I have gone through the
> documentations and examples but failed to fix my problem.
>
> ………………………………
>
> Variable: spi
> Type: double
> Total Size: 3151872 bytes
> 393984 values
> Number of Dimensions: 4
> Dimensions and sizes: [len | 8] x [time | 1368] x [lat | 4] x [lon | 9]
> Coordinates:
> len: [1..36]
> time: [ 380..41987]
> lat: [3.75..5.25]
> lon: [36.75..40.75]
> Number Of Attributes: 2
> long_name : SPI
> _FillValue : -999
>
> *Plot Parameter*
> ncl 55> yyyymm = f->time
> ncl 56> yyyymm = yyyymm/100yrStrt = 1901
> ncl 57> yrLast = 2014
> ncl 58> nyear = yrLast-yrStrt+1
> ncl 59> yyyymm = yyyymm_time(yrStrt, yrLast, "integer")
> ncl 60> yrfrac = (/yyyymm_to_yyyyfrac(yyyymm, 0.0)/)
> ncl 61>
> ncl 62> wks = gsn_open_wks ("ps","spi")
> ncl 63> res = True
> ncl 64> res at gsnDraw=False
> ncl 65> res at gsnFrame=False
> ncl 66> res at vpHeightF = 0.4
> ncl 67> res at vpWidthF = 0.8
> ncl 68> res at vpXF = 0.1
> ncl 69>
> ncl 70> res at trYMinF = -3.0
> ncl 71> res at trYMaxF = 3.0
> ncl 72> res at gsnYRefLine = 0.0
> ncl 73> res at xyMonoDashPattern = True
> ncl 74> res at xyLineThicknessF = 1
> ncl 75>
> ncl 76> plt = new (klen, "graphic")
> ncl 77> xyLineColors = (/"black","red","blue","green"
> ,"brown","magenta","grape"/)
> ncl 78> do k=0,klen-1
> ncl 79> res at xyLineColours = xyLineColours(k)
> ncl 80> res at gsnCenterString = "len="+klen(k)
> ncl 81> plt(k) = gsn_csm_xy (wks, yrfrac, spi(k,:), res)
> ncl 82> end do
> fatal:Undefined identifier: (xyLineColours) is undefined, can't continue
> fatal:["Execute.c":8638]:Execute: Error occurred at or near line 79
> ……………………………
>
> Thanks for your help
>
> Dawit
>
>
>
>
>
> On Apr 6, 2017, at 9:00 PM, Dennis Shea <shea at ucar.edu> wrote:
>
> I do not understand the question.
>
> https://www.ncl.ucar.edu/Applications/
>
> Under Data Analysis: Click 'Standardized Precipitation Index'
>
> See: Example 1
>
> You need to make the same array changes as in the print.
>
> EG: spi(0,:,)==> spi(0,:,nl,ml)
>
>
> On Thu, Apr 6, 2017 at 1:22 AM, Dawit Abebe <dawit.kan at gmail.com> wrote:
>
>> Hello All,
>>
>> Thanks to Dennis, I am able to appreciate the power of NCL computing SPI.
>> My next step is to produce
>> (1) a time serious XY plot for seasonal (SPI-3 ending in May and ending
>> in November), annual (SPI-12) and multi annual (SPI-24 and SPI-36 months)
>> and
>> (2) Shape map of selected annual SPI with extremely sever drought events
>> to examine the spatial characteristics of the drought.
>>
>> I’m not asking for help before I try by my self (thanks Dennis for the
>> push to do this). However, I need a quick comment how I should proceed from
>> the last step producing the SPI output, which was printing:
>>
>> print(yyyymm+sprintf("%8.2f", prc(:,nl,ml)) \
>>
>> +sprintf("%8.2f", spi(0,:,nl,ml))+sprintf("%8.2f",
>> spi(1,:,nl,ml)) \
>> +sprintf("%8.2f", spi(2,:,nl,ml))+sprintf("%8.2f",
>> spi(3,:,nl,ml)) \
>> +sprintf("%8.2f", spi(4,:,nl,ml))+sprintf("%8.2f",
>> spi(5,:,nl,ml)) \
>> +sprintf("%8.2f", spi(6,:,nl,ml)))
>>
>> Do I need to go through this and then start with plot parameters, or I
>> can continue with plot parameters without the print command?
>>
>> Thank you so much
>> Dawit
>>
>>
>>
>>
>> On Apr 5, 2017, at 4:43 PM, Dennis Shea <shea at ucar.edu> wrote:
>>
>> The error mesages is telling you the exact problem:
>> fatal:Plus: Number of dimensions do not match, can't continue
>>
>> spi has 4-dimensions:
>> [len | 7] x [time | 1368] x [lat | 4] x [lon | 9]
>>
>> prc has 3-dimensions
>> [time | 1368] x [lat | 4] x [lon | 9]
>>
>> yyyymm has 1-dimension
>> [time | 1368]
>>
>> ==============
>> The print statement you used was copied from:
>> https://www.ncl.ucar.edu/Document/Functions/Built-in/dim_spi_n.shtml
>> Example 2
>> That was working upon a single time series prc[*]
>>
>>
>>
>> You have a 4-D array. *You* must make the appropriate changed to handle
>> your situation.
>> The eamples are not generic to all dimensions.
>>
>> nlat=4
>> mlon=9
>>
>> do nl=0,nlat-1
>> do ml=0,mlon-1
>> print("------------------------------------------------")
>>
>> print(yyyymm+sprintf("%8.2f", prc(:,nl,ml)) \
>>
>> +sprintf("%8.2f", spi(0,:,nl,ml))+sprintf("%8.2f",
>> spi(1,:,nl,ml)) \
>> +sprintf("%8.2f", spi(2,:,nl,ml))+sprintf("%8.2f",
>> spi(3,:,nl,ml)) \
>> +sprintf("%8.2f", spi(4,:,nl,ml))+sprintf("%8.2f",
>> spi(5,:,nl,ml)) \
>> +sprintf("%8.2f", spi(6,:,nl,ml)))
>>
>> end do
>> en do
>>
>> On Wed, Apr 5, 2017 at 2:20 AM, Dawit Abebe <dawit.kan at gmail.com> wrote:
>>
>>> Hello all,
>>>
>>> Kindly help me to fix my problem with printing SPI. I pasted below first
>>> the return of printVarSummary(spi), which seems okay. However, my attempt
>>> to print the output (text in blue) did not work. What was wrong?
>>>
>>> Greatly appreciate your help.
>>>
>>> Dawit
>>>
>>> …………………………………….
>>>
>>> copy_VarCoords(prc,spi(0,:,:,:))
>>> spi at long_name = "SPI"
>>> spi!0 = "len"
>>> spi&len = len
>>>
>>> printVarSummary(spi)
>>>
>>>
>>> Variable: spi
>>> Type: double
>>> Total Size: 2757888 bytes
>>> 344736 values
>>> Number of Dimensions: 4
>>> Dimensions and sizes: [len | 7] x [time | 1368] x [lat | 4] x [lon | 9]
>>> Coordinates:
>>> len: [1..36]
>>> time: [ 380..41987]
>>> lat: [3.75..5.25]
>>> lon: [36.75..40.75]
>>> Number Of Attributes: 2
>>> long_name : SPI
>>> _FillValue : -999
>>>
>>>
>>> yyyymm = cd_calendar(f->time, -1)
>>>
>>> print(yyyymm+sprintf("%8.2f", prc) \
>>> +sprintf("%8.2f", spi(0,:))+sprintf("%8.2f", spi(1,:)) \
>>>
>>> +sprintf("%8.2f", spi(2,:))+sprintf("%8.2f", spi(3,:)) \
>>> +sprintf("%8.2f", spi(4,:))+sprintf("%8.2f", spi(5,:)) \
>>>
>>> +sprintf("%8.2f", spi(6,:)))
>>>
>>> fatal:Plus: Number of dimensions do not match, can't continue
>>> fatal:["Execute.c":8638]:Execute: Error occurred at or near line 37
>>>
>>>
>>>
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>>
>>
>
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