Re: plotting irregular x-axis

Hi Nick,

There's not enough information to go on here. It sounds like there's something strange about your X axis coordinate values.

What does
  

   printVarSummary(Temp)

report?

When you have weird problems like this, usually it's a good idea to try plotting your data with a bare number of resources set.

What happens if you just do:

res = True
res@cnFillOn = True
plot = gsn_csm_contour(wksPan1,transpose(Temp),res)

--Mary

On Nov 7, 2012, at 1:44 PM, Nick Guy wrote:

> Hi,
>
> I am trying to output a contour plot with irregular spacing along the X (time) axis. I continue to receive the below error:
> warning:IrTransInitialize: error creating spline approximation for trXCoordPoints; defaulting to linear
> warning:ComputeMinorTickMarks: The distance between major tickmarks is so close or so far apart that arithmetic error may cause problems determining the accurate locations of minor tickmarks
> warning:ComputeMinorTickMarks: The distance between major tickmarks is so close or so far apart that arithmetic error may cause problems determining the accurate locations of minor tickmarks
> warning:ContourPlotSetValues: current transformation requires trYMaxF to be within data coordinate range: resetting
> warning:_NhlCreateSplineCoordApprox: Attempt to create spline approximation for X axis failed: consider adjusting trXTensionF value
>
>
> I've found the archived discussions and examples talking about converting irregular axes to linear and tried a couple different things. Any help to figure out how to fix this would be wonderful!
>
> =====ATTEMPT WITH LABEL VIA TIME_AXIS_LABELS=======
> TAx=fspan(min(TimeAx),max(TimeAx),50)
> res1A=True
> res1A@gsnDraw=False ; Don't draw plot , do this with the panel
> res1A@gsnFrame=False ; Don't advance frame
> res1A@cnFillOn=True ; Turn on filled contours
> res1A@cnLinesOn=True
> res1A@cnLineLabelsOn=True
>
> res1A@gsnSpreadColors=True
> res1A@gsnLeftStringFontHeightF=.03 ; Shrink the label
> res1A@gsnRightStringFontHeightF=.03
> res1A@gsnXAxisIrregular2Linear=True
>
> res1A@lbOrientation="Vertical" ; Vertical colorbar
> res1A@vpWidthF=1. ; Make the plot longer
> res1A@vpHeightF=0.7 ; Make the plot shorter
>
> res1A@tiXAxisString="" ; No x-axis title
> res1A@tiYAxisString="Pressure (hPa)" ; Define Y-Axis title
> res1A@trYReverse=True ; Reverse the y-axis
> res1A@trYMinF=300. ; Set min Y plot range
> res1A@trYMaxF=1025. ; Set the max Y plot range
> res1A@tmXBLabelsOn=True
>
> restime=True
> restime@ttmAxis="XB"
> restime@ttmFormat="%H:%M"
> restime@ttmMajorStride=10
>
> time_axis_labels(TimeAx,res1A,restime)
> panPlot1(0)=gsn_csm_contour(wksPan1,transpose(Temp),res1A)
> ====================================================
>
> and also setting your axis to irregular and defining the
>
> ======ATTEMPT DEFINING AXIS==========================
> res1B=True
> res1B@gsnDraw=False ; Don't draw plot , do this with the panel
> res1B@gsnFrame=False ; Don't advance frame
> res1B@cnFillOn=True ; Turn on filled contours
>
> res1B@gsnSpreadColors=True
> res1B@gsnLeftStringFontHeightF=.03 ; Shrink the label
> res1B@gsnRightStringFontHeightF=.03
>
> res1B@lbOrientation="Vertical" ; Vertical colorbar
> res1B@vpWidthF=1. ; Make the plot longer
> res1B@vpHeightF=0.7 ; Make the plot shorter
>
> res1B@tiXAxisString=" " ; No x-axis title
> res1B@tiYAxisString="Pressure (hPa)" ; Define Y-Axis title
> res1B@trYReverse=True ; Reverse the y-axis
> res1B@trYMinF=300. ; Set min Y plot range
> res1B@trYMaxF=1025. ; Set the max Y plot range
>
> res1B@sfXArray=TimeAx
> res1B@trXAxisType="Irregular"
> res1B@trXCoordPoints=TimeAx
> ; res1B@tmXB
> panPlot1(1)=gsn_csm_contour(wksPan1,transpose(RH),res1B)
> ====================================================
>
> Thanks!
>
> Nick Guy
> nick.guy@noaa.gov
>
>
>
>
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Received on Thu Nov 8 09:12:46 2012