[ncl-talk] cross-correlation

[Dennis Shea]

As we have said before, you must read the error message and then look at
the function being called and the day being used. Further, looking at the
Examples helps a lot.

===
fatal:esccr: the rightmost dimension of x and y must be the same
fatal:["Execute.c":8640]:Execute: Error occurred at or near line 141 in
file ccr.ncl
===

look at line 141

ccr = esccr(ts1,ts2,maxlag)                   ; calc cross correlations

at lines 133,134, you have

  ts1 = data_single(:)
  ts2 = data_subset(:,:,:)


*Variable: data_single      ==> ts1Dimensions and sizes:    [time | 96]*




*Variable: data_subset      ==> ts2Dimensions and sizes:    [time | 96] x
[lat | 1185] x [lon | 1071]*
As noted in the function documentation,
*x*: An array of any numeric type or size. The rightmost dimension is
usually time.

*y: *An array of any numeric type or size. The rightmost dimension is
usually time. *The size of the rightmost dimension must be the same as x. *

====

Clearly. the "rightmost" dimension of 'ts1' [size=1071'] does not match the
size of ts1' [size=96]

 Example 2 in the documentation, show how the address this situation. Use,
NCL's dimension reordering:

ccr = esccr(ts1,ts2(lat|:,lon|:,time|:), maxlag)


On Fri, Feb 23, 2018 at 4:07 AM, Kunal Bali <kunal.bali9 at gmail.com> wrote:

> Dear NCL user,
>
> I am using the attached script to calculate the cross-correlation between
> single grid cell to neighbor grid cells with time.
>
> I am getting an error
> fatal:esccr: the rightmost dimension of x and y must be the same
> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 141 in
> file ccr.ncl
>
> ---
> The summary is here:
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> *Copyright (C) 1995-2017 - All Rights Reserved University Corporation for
> Atmospheric Research NCAR Command Language Version 6.4.0 The use of this
> software is governed by a License Agreement. See http://www.ncl.ucar.edu/
> <http://www.ncl.ucar.edu/> for more details.Variable: totcType: floatTotal
> Size: 2025086976 <(202)%20508-6976> bytes            506271744 valuesNumber
> of Dimensions: 3Dimensions and sizes:    [time | 96] x [lat | 2112] x [lon
> | 2497]Coordinates:             time:
> [35430.125..104813.7916666667]            lat:
> [5.0078125..37.9921875]            lon: [  59..  98]Number Of Attributes:
> 8  long_name :    AOT at 0.55 micron  hdfeos_name :    Optical_Depth_055
> projection :    Albers Conical Equal_Area  unit :    None
> _FillValue_original :    -28672  _FillValue :    -28672
> missing_value_original :    -28672  missing_value :    -28672Variable:
> data_subsetType: floatTotal Size: 487347840 bytes            121836960
> valuesNumber of Dimensions: 3Dimensions and sizes:    [time | 96] x [lat |
> 1185] x [lon | 1071]Coordinates:             time:
> [35430.125..104813.7916666667]            lat:
> [23.5078125..5.0078125]            lon: [72.78125..89.5]Number Of
> Attributes: 8  missing_value :    -28672  missing_value_original :
> -28672  _FillValue :    -28672  _FillValue_original :    -28672  unit :
> None  projection :    Albers Conical Equal_Area  hdfeos_name :
> Optical_Depth_055  long_name :    AOT at 0.55 micron(0)    nearest
> location: k=0  n=541 m=1291  13.4609375  79.17187499999999(0)
> -----Variable: data_singleType: floatTotal Size: 384 bytes            96
> valuesNumber of Dimensions: 1Dimensions and sizes:    [time |
> 96]Coordinates:             time: [35430.125..104813.7916666667]Number Of
> Attributes: 10  lon :    79.171875  lat :    13.4609375  missing_value :
> -28672  missing_value_original :    -28672  _FillValue :    -28672
> _FillValue_original :    -28672  unit :    None  projection :    Albers
> Conical Equal_Area  hdfeos_name :    Optical_Depth_055  long_name :    AOT
> at 0.55 micron(0)    -----*
> fatal:esccr: the rightmost dimension of x and y must be the same
> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 141 in
> file ccr.ncl
>
>
> ---
> Kunal Bali
>
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>
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