[ncl-talk] about irregular time with gsn_csm_lat_time
Mary Haley
haley at ucar.edu
Wed Aug 24 08:47:51 MDT 2016
The time_axis_labels sets some tmXXXX resources for you under the hood, and
you can add more tm resources as desired.
Try setting the tmXBLabelFontHeightF resource to make the font height
smaller for the X axis labels.
Try something small, like 0.008:
time_axis_labels(newtime, res, resxt)
res at tmXBLabelFontHeightF = 0.008
--Mary
On Tue, Aug 23, 2016 at 8:22 PM, dyjbean at gmail.com <dyjbean at gmail.com>
wrote:
> thanks, according to the link and your code, i made the following plot
>
> resxt= True
> resxt at ttmFormat = "%c"
> ;resxt at ttmMajorStride = 3
> resxt at ttmNumTicks = 10
> time_axis_labels(newtime, res, resxt)
>
> but i cannot find the attribute about font size with prefix "ttm", if i
> set ttmNumTicks more than 10 or others , the x-axis appearance will be
> overlaid each other.
>
> thanks
>
> ------------------------------
> dyjbean at gmail.com
>
>
> *From:* Mary Haley <haley at ucar.edu>
> *Date:* 2016-08-23 23:39
> *To:* dyjbean at gmail.com
> *CC:* ncl-talk <ncl-talk at ucar.edu>
> *Subject:* Re: [ncl-talk] about irregular time with gsn_csm_lat_time
> Hi,
>
> The problem is that you are trying to use rather erratically spaced values
> on the X axis.
>
> If you think about the "time" values as just regular numbers, this means
> when you go from time=201111, 201112, 201201, 201202, you are going from an
> increment of 1, to an increment of 89, and then back to an increment of 1.
> This is what causes NCL to give you the "spline" error.
>
> To fix this, you need to convert your YYYYMM time values into numeric
> values with more reasonable spacing. This can be done using cd_inv_calendar:
>
> http://www.ncl.ucar.edu/Document/Functions/Built-in/cd_inv_calendar.shtml
>
> You can then use the very nice user contributed "time_axis_labels" routine:
>
> http://www.ncl.ucar.edu/Document/Functions/User_
> contributed/time_axis_labels.shtml
>
> to easily format the X axis as desired,
>
> See the attached "fixtime.ncl" script which uses dummy data, based on the
> lat/time values you provided in your script.
>
> --Mary
>
>
> On Tue, Aug 23, 2016 at 3:44 AM, dyjbean at gmail.com <dyjbean at gmail.com>
> wrote:
>
>> hi,
>> when i use gsn_csm_lat_time, i got the following warning info:
>> warning:_NhlCreateSplineCoordApprox: Attempt to create
>> spline approximation for X axis failed: consider
>> adjusting trXTensionF value
>> warning:IrTransInitialize: error creating spline approximat
>> ion for trXCoordPoints; defaulting to linear
>> and the x-axis didn't appear.
>>
>> the below is my script:
>>
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/shea_util.ncl"
>>
>> begin
>>
>> minlat = 9
>> maxlat = 56
>> minlon = 70
>> maxlon = 150
>>
>>
>> files10=systemfunc("cat nccolumn.log")
>> print(files10)
>>
>> setfileoption("nc","Format","LargeFile")
>> mons01ff=addfiles(files10,"r")
>> ListSetType(mons01ff,"join")
>>
>>
>> slat10=mons01ff[:]->lat
>> slon10=mons01ff[:]->lon
>> colm10=mons01ff[:]->column_ozone
>> colm10dms=dimsizes(colm10)
>> colm10 at _FillValue=999.0
>> colm10=colm10*0.1
>>
>> pcolm10=colm10(:,{minlon:maxlon},{minlat:maxlat})
>>
>>
>> tlat10=slat10(0,{minlat:maxlat})
>> tlon10=slon10(0,{minlon:maxlon})
>>
>>
>> tlat10 at units="degrees-north"
>> tlon10 at units="degrees-east"
>>
>>
>>
>> acolm10=dim_avg_n(pcolm10,1)
>> ;print("----"+dimsizes(acolm10))
>>
>> times10=yyyymm_time(2010,2012,"integer")
>> ;times10=yyyymm_to_yyyyfrac(itimes10, 0.0)
>> times10!0 = "time"
>> times10 at units="Months since January 2010"
>> times10 at long_name="Months"
>>
>> acolm10!0="time"
>> acolm10!1="lat"
>> acolm10 at units=colm10 at units
>> acolm10 at long_name=colm10 at long_name
>> acolm10&time=times10
>> acolm10&lat=tlat10
>> ; print(times10)
>>
>> printVarSummary(acolm10)
>>
>> ;printMinMax(acolm10&lat, 0)
>> ; printMinMax(tlon10, 0)
>>
>> print(acolm10&time)
>>
>> delfile=systemfunc("rm "+"zonal_column"+".png")
>> wks=gsn_open_wks("png","zonal_column")
>> gsn_define_colormap(wks,"GMT_no_green")
>> res = True
>> res at cnFillOn = True
>> res at cnLinesOn = False
>> res at gsnAddCyclic = False
>>
>> ;res at pmTickMarkDisplayMode = "Always"
>> res at tmYLMode = "Explicit"
>> res at tmYLValues =(/10,15,20,25,30,35,40,45,50,55/)
>> res at tmYLLabels =(/"10~S~o~N~N","15~S~o~N~N","20~S~o~N~N",
>> "25~S~o~N~N",\
>> "30~S~o~N~N","35~S~o~N~N","40~S~o~N~N", \
>> "45~S~o~N~N","50~S~o~N~N","55~S~o~N~N"/)
>> ;res at tmXBMinorOn = False
>>
>> res at tmXBMode = "Explicit"
>> ;res at tmXBFormat = "f"
>> ;res at tmXBValues =(/201001,201002,201003,201004,201005,201006,\
>> ; 201007,201008,201009,201010,201011,201012,\
>> ; 201101,201102,201103,201104,201105,201106,\
>> ; 201107,201108,201109,201110,201111,201112,\
>> ; 201201,201202,201203,201204,201205,201206,\
>> ; 201207,201208,201209,201210,201211,201212/)
>>
>>
>> res at tmXBValues =(/201001,201003,201006,201009,201012,\
>> 201101,201103,201006,201109,201112,\
>> 201201,201203,201206,201209,201212/)
>>
>> ;res at tmXBLabels =(/"JAN","FEB","MAR","APR","MAY","JUN",\
>> ; "JUL","AUG","SEP","OCT","NOV","DEC",\
>> ; "JAN","FEB","MAR","APR","MAY","JUN",\
>> ; "JUL","AUG","SEP","OCT","NOV","DEC",\
>> ; "JAN","FEB","MAR","APR","MAY","JUN",\
>> ; "JUL","AUG","SEP","OCT","NOV","DEC"/)
>> res at tmXBLabels =(/"JAN~C~2010","MAR~C~2010","JUN~C~2010",
>> "SEP~C~2010","DEC~C~2010",\
>> "JAN~C~2011","MAR~C~2011","JUN~C~2011",
>> "SEP~C~2011","DEC~C~2011",\
>> "JAN~C~2012","MAR~C~2012","JUN~C~2012",
>> "SEP~C~2012","DEC~C~2012"/)
>> res at tmXBLabelFontHeightF = 0.015
>> ;res at tmYLMinorOn = False
>>
>> res at tiMainString = ""
>>
>> plot=gsn_csm_lat_time(wks,acolm10(lat|:,time|:),res)
>>
>> end
>>
>>
>> the red letters is my origin destination, the blue letters is my test,
>> but they didn't give the right plot.
>>
>> the following is my running information:
>> Variable: acolm10
>> Type: float
>> Total Size: 6768 bytes
>> 1692 values
>> Number of Dimensions: 2
>> Dimensions and sizes: [time | 36] x [lat | 47]
>> Coordinates:
>> time: [201001..201212]
>> lat: [9.5..55.5]
>> Number Of Attributes: 3
>> long_name : ozone column
>> units : DU
>> _FillValue : 999
>>
>>
>> Variable: time (coordinate)
>> Type: integer
>> Total Size: 144 bytes
>> 36 values
>> Number of Dimensions: 1
>> Dimensions and sizes: [time | 36]
>> Coordinates:
>> Number Of Attributes: 2
>> units : Months since January 2010
>> long_name : Months
>> (0) 201001
>> (1) 201002
>> (2) 201003
>> (3) 201004
>> (4) 201005
>> (5) 201006
>> (6) 201007
>> (7) 201008
>> (8) 201009
>> (9) 201010
>> (10) 201011
>> (11) 201012
>> (12) 201101
>> (13) 201102
>> (14) 201103
>> (15) 201104
>> (16) 201105
>> (17) 201106
>> (18) 201107
>> (19) 201108
>> (20) 201109
>> (21) 201110
>> (22) 201111
>> (23) 201112
>> (24) 201201
>> (25) 201202
>> (26) 201203
>> (27) 201204
>> (28) 201205
>> (29) 201206
>> (30) 201207
>> (31) 201208
>> (32) 201209
>> (33) 201210
>> (34) 201211
>> (35) 201212
>> warning:_NhlCreateSplineCoordApprox: Attempt to create
>> spline approximation for X axis failed: consider
>> adjusting trXTensionF value
>> warning:IrTransInitialize: error creating spline approximati
>> on for trXCoordPoints; defaulting to linear
>>
>>
>> can you give me some advice for tuning this irregular x-axis time labels?
>>
>> thanks
>>
>>
>>
>>
>> ------------------------------
>> dyjbean at gmail.com
>>
>> _______________________________________________
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>
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