[ncl-talk] Dimension error in Overlay plot

[Rick Brownrigg]

Hi,

Impossible to tell -- the script fragment had only 40-some lines, whereas
the error message points to line #82.  Can you tell us what line that
corresponds to?  In any case, the error message indicates the problem -
there's a mismatch between expected dimensionality and the actual
dimensions that you'll need to address somehow.

Rick


On Wed, Oct 2, 2019 at 8:49 AM S Br via ncl-talk <ncl-talk at ucar.edu> wrote:

> Hi All,
> I am trying to prepare a line plot  (having two lines) using Overlay
> function. Both individual lines are working fine, but I get the following
> error message when I use the Overlay function.
>
> fatal:Number of elements of dimension (0) of argument (0) is (2) in
> function (overlay), expected (1) elements
> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 82 in
> file lineplot.ncl
>
> My script and PrintVarSummary are given below.
>
> ;create plot
> ;************************************
>   wks = gsn_open_wks("x11","lineplot")             ; send graphics to PNG
> file
>   plot = new(2,graphic)                         ; create graphic array
>   times = (/1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12/)
>   xlabels = (/"J", "F","M","A","M","J","J","A","S","O","N","D"/)
>   res                     = True
>   res at gsnDraw             = False            ; don't draw
>   res at gsnFrame            = False            ; don't advance frame
>   res at vpHeightF = 0.40        ; Changes the aspect ratio
>   res at vpWidthF  = 0.60
>
>   res at xyMarkLineMode = "MarkLines"               ; Markers *and* lines
>   res at xyDashPattern  = 0                         ; Make curves all solid
>   res at xyLineThicknesses = 3.0          ; make second line thicker
>   res at xyLineColors      = "black"          ; change line color
>   res at xyMarkers      = 5               ; 3 different markers
>   res at xyMarkerSizeF  = 0.015
>   res at xyMarkerThicknesses = 3
>
>   res at tmYROn                = False
>   res at trYMinF               = 0.              ; Make sure Y axis starts
> at 0.
>   res at trYMaxF               = 10.             ; Make sure Y axis starts
> at 0.
>   res at trXMinF               = 0.              ; Make sure Y axis starts
> at 0.
>   res at trXMaxF               = 13.             ; Make sure Y axis starts
> at 0.
>   res at tiYAxisString         = ""
>   res at gsnCenterString     = "SurTemp (K)"         ; change Center string
>   res at gsnRightString     = ""         ; change Center string
> ;************
>   res at tmXBMode  = "Explicit"
>   res at tmXBValues      = (/1, 2, 3, 4, 5, 6, 7,8,9,10,11,12/)
>   res at tmXBLabels = (/"J", "F","M","A","M","J","J","A","S","O","N","D"/)
> ;************
>   plot = gsn_csm_xy(wks,times, obssats(:), res)
> ;  res at xyLineColors      = "red"          ; change line color
> ;  res at xyMarkerColors    = "red"
>   plotb = gsn_csm_xy(wks,times, ctrlsats2(:), res)
>   overlay(plot,plotb)
>
>    draw(plot)
>    frame(wks)
> end
> ################################
>
> VarSummary of two variables:
>
> Variable: obssats
> Type: float
> Total Size: 48 bytes
>             12 values
> Number of Dimensions: 1
> Dimensions and sizes: [time | 12]
> Coordinates:
>             time: [-657073..-656739]
> Number Of Attributes: 13
>   _FillValue : -9.96921e+36
>   actual_range : ( 0.0005604419, 30.16107 )
>   parent_stat : Mean
>   statistic : Long Term Mean
>   level_desc : Surface
>   dataset : GPCP Version 2.3 Combined Precipitation Dataset
>   var_desc : Precipitation
>   least_significant_digit : 2
>   precision : 32767
>   units : mm/day
>   long_name : Long Term Mean Average Monthly Rate of Precipitation
>   missing_value : -9.96921e+36
>   wgt_areaave_op_ncl : Area Average
>
>
> ariable: ctrlsats2
> Type: float
> Total Size: 48 bytes
>             12 values
> Number of Dimensions: 1
> Dimensions and sizes: [time | 12]
> Coordinates:
>             time: [ 588.. 599]
> Number Of Attributes: 8
>   surface : 0
>   wgt_areaave_op_ncl : Area Average
>   missing_value : 2e+20
>   long_name : TOTAL RAINFALL
>   units : MM/DAY
>   grid_type : gaussian
>   lev_type_char : surfa
>   _FillValue : 2e+20
>
>
>
>
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