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From: Mary Haley (haley AT XXXXXX)
Date: Fri Oct 29 2004 - 10:38:58 MDT

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    >
    > hello!
    >
    > Thank you for your attention!
    >
    > I using :
    >
    > wks=gsn_open_wks("ps",diro+"DJFcmtctldiff79-98TUV200hPa")
    >
    > gsn_define_colormap(wks,"BlAqGrYeOrReVi200")
    >
    >
    > res = True
    > res = True
    > res@gsnSpreadColors = True
    > res@gsnSpreadColorEnd = 193
    > res@gsnSpreadColorStart = 6
    > res@lbLabelStride = 2
    > i = NhlNewColor(wks,0.7,0.7,0.7)
    >
    > res@vcRefMagnitudeF = 5.0
    > res@vcRefLengthF = 0.050
    > res@vcGlyphStyle = "CurlyVector"
    > res@vcMinDistanceF = 0.017
    >
    > res@cnLevelSelectionMode = "ManualLevels"
    > res@cnMinLevelValF = -10.0
    > res@cnMaxLevelValF = 10
    > res@cnLevelSpacingF = 1
    >
    >
    > plot = new(1,graphic)
    > plot=gsn_csm_vector_scalar_map_ce(wks,diff2(5,:,:),diff3(5,:,:),diff1(5,:,:),res)
    >
    >
    >
    > I get the answer is :
    >
    > warning:cnLevelSelectionMode is not a valid resource
    > in /DJFcmtctldiff79-98TUV200hPa_vector at this time
    > warning:cnMinLevelValF is not a valid resource in
    > /DJFcmtctldiff79-98TUV200hPa_vector at this time
    > warning:cnMaxLevelValF is not a valid resource in
    > /DJFcmtctldiff79-98TUV200hPa_vector at this time
    > warning:cnLevelSpacingF is not a valid resource in
    > /DJFcmtctldiff79-98TUV200hPa_vector at this time
    >
    > Do anyone know how to change the scalar of the color
    > bar?
    >
    >

    Liping,

    If you want the "gsn_csm_vector_scalar_map_ce" function to produce
    separate contours from the scalar field, and not just color the
    vectors according to the scalar field (which is the default), you need
    to set:

        res@gsnScalarContour = True

    This should get rid of the warning messages, and produce a plot
    with vectors and contours.

    --Mary
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