NCL常见错误解决方案Word文档格式.docx
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NCL常见错误解决方案Word文档格式.docx
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3.HowdoIsetupmyenvironmenttorunNCL
4.HowdoIrunNCL
5.HowdoIdeterminetheversionofNCL
6.ArethereanyemaillistsIcanjoin
7.WherecanIseesomeexamplesofhowtouseNCL
8.ArethereanyNCLcommandlineoptionsIcanuse
9.ArethereanyeditorenhancementsforeditingNCLscripts
10.IfI'
mrunningNCLinteractively,arethereanycommand-lineshortcutsIcanuse
11.IfI'
mrunninginteractively,howcanIloadsomeexistingNCLcode
12.IsthereanywayIcanturnoffthepreceding"
(n)"
outputwhenIprintabunchofvalues
13.MyNCLscriptisquittingsuddenly,andI'
mnotsurewhereand/orwhy.
14.HowdoItellifIhaveanOPeNDAP-enabledNCL
NCLcorelanguage
1.HowdoIcommentalineinNCLIsthereawaytohaveablockofcomments
2.IsthereacontinuationcharacterinNCL
3.HowdoIeasilyconvertanumbertoastring
4.HowdoIcreateanewvariablethatdoesn'
tcontaina_FillValueattribute
5.HowdoIcreateadouble,long,short,orbytevariablewithoutusing"
new"
oroneoftheconversionroutines,like"
integertobyte"
6.HowdoIincludethedoublequote("
)characterinanNCLstring
7.CanNCLpromptforuserinput
8.IsitpossibletohaveglobalvariablesinNCL
9.HowcanIdeletemultipleNCLvariableswithonestatement
10.HowdoIdeleteanameddimension
11.IsthereawaytoseetheloadedvariablesandtheirdimensionsinNCLsimilarto"
whos"
inmatlab
12.I'
mgettinganunexpectedvaluewhenIusethepower('
^'
)operatorcombinedwithanegativevalue.
13.HowdoIcreatealistofstringintegerswithleadingzeros("
008"
"
009"
010"
etc)
14.HowdoIgetthecurrentdateintoNCLasastring
15.HowdoIgetalistoffilesintoanarrayofstringsinNCL
16.HowcanIrecursivelygetalistoffilesinadirectorytreeintoNCL
17.HowdoIconcatenatestringsandvaluesinNCL
18.HowdoIretrieveanenvironmentvariableinNCL
19.HowdoIprintnicelyformatted,multiplecolumnsofdatainNCL
20.Canmultiplevariablesbereturnedfromausercreatedfunction
Fileinput/output
1.What'
stheeasiestwaytoconvertaGRIB1,GRIB2,HDF4,orHDF-EOS2filetoaNetCDFfile
2.HowdoIdumpthecontentsofaGRIB,HDF,orHDF-EOSfile(orvariableonthefile)tothescreen
3.HowdoIconvertalargefiletoaNetCDFfile
4.HowdoIwritealarge(>
2GB)variabletoanetCDFfile
5.HowdoIgetthelatesttablesforreadingGRIBfiles
6.WhyhavesomeofmyGRIB2variablenameschangedsinceIupdatedtoNCL
HowdoIwriteascalartoaNetCDFfile
7.HowdoIretainmetadataforavariablethatwasreadoffaseriesoffilesusing"
addfiles"
8.HowdoIaccessanNCLfilevariable,attributes,orcoordinatearraysiftheyhavehyphens/dashes('
-'
)inthename
9.HowdoIread/writeNetCDF,HDF4,HDF-EOS2,GRIB1,GRIB2,orCCMHistoryTapefiles
10.HowdoIread/writeASCIIfiles
11.HowdoIreadCSVfiles
12.HowdoIwriteaformattedASCIIfile
13.HowdoIreadanASCIIfileifIdon'
tknowhowmanylinesitcontains
14.HowdoIreadanASCIIfilethatcontainsdelimiters
15.HowdoIread/writebinaryfiles
16.OnceI'
veopenedafilewith"
addfile"
howdoIfindoutwhatvariablesandattributesitcontains
17.Isthereawaytocontrolwhethermybinaryfileisreadorwrittenaslittleendianorbigendian
18.I'
mhavingtroublereadingaFortranbinaryfilewithrecords.
19.I'
mtryingtoconvertafiletoaNetCDFfileusing"
ncl_convert2nc"
butgettinganerrormessageaboutviolatingformatconstraints.
20.WhydoIgetdifferentresultswhenreadingmyHDF-EOS2file,dependingonwhetherIusethe"
.hdf"
or"
.hdfeos"
extension
21.CanIreadshapefilesusingNCL
22.HowcanIgetatvgroupdataonmyHDF4file
23.WhenIrunmyscript,I'
mgettinganerrormessage"
ncclose:
ncid0:
NetCDF:
NotavalidID"
.
24.WhenItrytoaccesstheClimateDiagnosticsCenter[CDC]OPeNDAPserverviaNCL,Iget"
Permissiondenied"
25.I'
mrunningintoaproblemwhenopeninglotsoffileswithaddfileoraddfiles("
Toomanyfilesopen"
).
Datahandling
1.HowdoIsetamissingvalueformydata
2.HowdoIdetermineifmydatacontainsanymissingvalues,orcounthowmanymissingvaluesithas
3.HowdoIchangethemissingvaluetoanothervalue
4.HowdoIdealwithNaN(not-a-number)valuesinmydata
5.HowdoIdealwith"
Inf"
(infinity)valuesinmydata
Dataanalysis
1.HowdoIaveragevaluesinamulti-dimensionedarray
2.HowcanIdoanelement-wiseminimum/maximumbetweentwoarraysofthesamesize
3.HowdoIinterpolatemy2-dimensionalrandomdatatoa2-dimensionalgriddedarray
4.HowdoIinterpolatemy3-dimensionalrandomdatatoa3-dimensionalgriddedarray
5.HowcanIfigureoutifaparticularlatitude/longitudepointiswithinaspecificarea,likeEurope
Visualization
1.HowcanIcreatean"
editable"
graphicsfilerequiredforjournalpublication
2.HowcanImaximizethesizeofaplotintheframe
3.HowdoIgetmultipleplotsonapage
4.What'
sagoodwaytogenerateacolormap(table)
5.Mymapprojectiondoesn'
tlookright.
6.HowdoIchangeallofmyfontstobethesameinmyvisualization
7.HowcanIchangethetextfunctioncodetosomethingotherthanacolon
8.HowcanIgetadegreesymbolinatextstring
9.HowcanIgetthingslikeaccentsorumlautsovermytext
10.HowcanIgetspecialcharacters,likeGreeksymbols,inmygraphicaltextstrings
11.CanIuserealPostScriptfontsinmyPostScriptfile
mhavingtroubleimportingaPSfileintoanapplicationlikeAdobeIllustrator.
13.HowcanIgetthelengthofmyaxestobethesameratioastherangeofmyaxes
14.HowdoIchangetheaspectratioorsizeofmymaporplot
15.CanIsetcolorresourcesbycolornameratherthancolorindexvalues
16.HowcanIspeedupthedrawingoffilledcontoursinNCL
17.CanIchangecolorindexvaluesorcolormapsinmid-frame
18.HowdoIgetmyPostScript/PDFoutputtocovermostofan8-1/2"
x11"
page
19.HowcanIcontrolthesizeandlocationoftheX11windowthatNCLbringsup
20.HowdoItellNCLtoignoremissingvaluesinmyplot
21.HowcanIgetmorelabelsonmycontourlines
22.MyXorYaxisvaluesarenotlinear.HowcanIchangethis
23.HowdoIgetlogscalingoneitherofmyplotaxes
24.HowdoIfillmycontourlevelswithvariousshadingpatternsand/orsolidcolors
25.HowdoIoverlayacontourplot(oravector/streamlineplot)onamap
26.HowdoIforcethetickmarkstopointinward
27.I'
mtryingtocontrolthetickmarksonthetoporrightaxis,andnothingishappening.
28.HowcanIimprovetheresolutionofmymapoutlines
29.WhenIdrawamapusingthehigh-resolutionmapdatabase,Iseemtorandomlygetdifferentresolutions.
30.HowcanIgetmoregeographicaloutlinesinmymap,liketheprovincesofChina
31.IfIamcreatingacolorcontourorvectorplot,howdoIselectmycolorssuchthattheyarespreadacrossmywholecolormap
32.HowdoIgenerateawire-framesurfaceorisosurfaceplotinNCL
33.HowdoIdrawweathersymbols(windbarbs,weatherfrontlines,highandlowpressureindicators,arrows,dots,weathericons,cloudsymbols,lightningbolts,etc.)onamap
34.HowcanIhaveanewlineaspartofagraphicaltextstringinNCL
35.HowcomeIgetdifferentlinethicknessesondifferentoutputdevicesusingthesamethicknessvalue
36.HowcanIputatimestamponmyplot
37.WhyamInotgettingthecolorIexpectwhenIreferenceanamedcolor
38.WhyismylandnotbeingfilledinthecolorIexpect
39.HowdoIsetupmyNCLscriptsothatitusesaresourcefile
40.HowcanImoveandresizemylabelbarand/orlegend
41.HowcanIsettheprecisionofthelabelbarlabels
42.HowcanIgeneratesome"
nice"
2Drandomdataforacontourand/orvectorplot
Arrayfunctions
1.HowdoIgetthedimensionsofanarray
2.HowdoIcreateuniquerandomsubscripts
3.HowdoIeliminatemissingvaluesfromaone-dimensionalarray
4.HowdoIgenerateaone-dimensionalarrayofequally-spacedintegersorfloatingpointnumbers
5.HowdoIfindorprinttheminimum/maximumvaluesofmydataarray
Outputformats
1.HowdoIchangethedefaultNCGM/PostScript/PDFfilenametosomethingelse
2.HowdoIconvertmyNCLgraphicsfiletoanotherformat,likePNG,toputontheweborinapresentation
3.HowdoIremoveallthewhitespacefromanimage
4.IsthereawaytomakethePostScriptfilesgeneratedbyNCLsmaller
5.CanIproduceaPNGimagedirectlyfromNCL
6.Isthereawaytoremovethe"
.000001."
fromthePNGfilename
7.HowcanItiltanNCLgraphic
8.HowcanIconvertaseriesofPSorEPSfilestoananimation
9.HowcanIproduceGoogleEarthkmzfiles
10.HowdoIconvertmymulti-frameNCLgraphicsfiletoanMPEGmoviefile
11.HowdoIincludeanencapsulatedPostScriptfilefromNCLinaLaTexdocument
Errormessages
1.WhenIrunmyscript,I'
mgettinga"
fatal:
NclMallocFailed"
errormessage.
2.WhenIrunNCL,Igetanerrormessageaboutbeingunabletoloadthe"
SystemResourceFile"
3.WhenIrunNCL,IgetanerrormessageabouttheXdriver,like"
erroropeningdisplay"
sthedealwiththeerrormessage"
error:
line-1beforeornear..."
5.HowcanIturnoffNCLwarningmessages
6.I'
mtryingtolistsomefiles,andgettinganerror"
Argumentlisttoolong"
7.WhenItrytorunncl,Igetanerrorabout"
"
notbeingfound.
8.I'
mtryingtocompilem
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