Table of Fitgrid control parameters


The following table summarizes all of the parameters used for controlling the behavior of Fitgrid. These parameters apply only to the C and NCL interfaces.

For C, the values for these parameters can be set by using the procedures c_ftseti, c_ftsetr, c_ftsetc, and c_ftsetfa. For NCL programs, the parameters can be set using the NCL procedure ftsetp.

          |            |                     |               |                 
Parameter | parameter  |                     |               |
  name    |   type     |  description        | legal values  | default value
          |            |                     |               |                 
------------------------------------------------------------------------------
  eps     | float      | smoothing parameter | 0. <= eps and | none
          |            | for ftcurvs and     | 1. >= eps     |
          |            | ftcurvps            |               |
------------------------------------------------------------------------------
  sig     | float      | the value of the    | >= 0.         | 1.
          |            | tension factor      |               |
------------------------------------------------------------------------------
  sl1     | float      | the slope of the    | any float     | 0.         
          |            | curve at the first  |               |
          |            | point (see parameter|               |
          |            | sf1).               |               |
------------------------------------------------------------------------------
  sln     | float      | the slope of the    | any float     | 0.         
          |            | curve at the final  |               |
          |            | point (see parameter|               |
          |            | sf1).               |               |
------------------------------------------------------------------------------
  sf1     | int        | controls the use of | 0=use both    | 3          
          |            | parameters sl1 and  | 1=use sl1 only|
          |            | sl2                 | 2=use sl2 only|
          |            |                     | 3=use neither |
------------------------------------------------------------------------------
  sf2     | int        | controls the use of | 0=use neither | 3          
          |            | parameters smt and  | 1=use both    |
          |            | eps                 | 2=use smt only|
          |            |                     | 3=use eps only|
------------------------------------------------------------------------------
  smt     | float      | smoothing parameter | > 0.          | none
          |            | for ftcurvs and     |               |
          |            | ftcurvps            |               |
------------------------------------------------------------------------------
  zx1     | float array| X partials at left  | any floats    | none
          |            | for ftsurf          |               | 
------------------------------------------------------------------------------
  zxm     | float array| X partials at right | any floats    | none
          |            | for ftsurf          |               | 
------------------------------------------------------------------------------
  zy1     | float array| Y partials at bottom| any floats    | none
          |            | for ftsurf          |               | 
------------------------------------------------------------------------------
  zyn     | float array| Y partials at top   | any floats    | none
          |            | for ftsurf          |               | 
------------------------------------------------------------------------------
  z11     | float      | X-Y partial at lower| any float     | none
          |            | left for ftsurf     |               | 
------------------------------------------------------------------------------
  zm1     | float      | X-Y partial at lower| any float     | none
          |            | right for ftsurf    |               | 
------------------------------------------------------------------------------
  z1n     | float      | X-Y partial at upper| any float     | none
          |            | left for ftsurf     |               | 
------------------------------------------------------------------------------
  zmn     | float      | X-Y partial at upper| any float     | none
          |            | right for ftsurf    |               | 
------------------------------------------------------------------------------
  df1     | int        | flag indicating if  | 0 = yes       | 1
          |            | zx1 is user supplied| 1 = no        |
------------------------------------------------------------------------------
  df2     | int        | flag indicating if  | 0 = yes       | 1
          |            | zxm is user supplied| 1 = no        |
------------------------------------------------------------------------------
  df3     | int        | flag indicating if  | 0 = yes       | 1
          |            | zy1 is user supplied| 1 = no        |
------------------------------------------------------------------------------
  df4     | int        | flag indicating if  | 0 = yes       | 1
          |            | zyn is user supplied| 1 = no        |
------------------------------------------------------------------------------
  df5     | int        | flag indicating if  | 0 = yes       | 1
          |            | z11 is user supplied| 1 = no        |
------------------------------------------------------------------------------
  df6     | int        | flag indicating if  | 0 = yes       | 1
          |            | zm1 is user supplied| 1 = no        |
------------------------------------------------------------------------------
  df7     | int        | flag indicating if  | 0 = yes       | 1
          |            | z1n is user supplied| 1 = no        |
------------------------------------------------------------------------------
  df8     | int        | flag indicating if  | 0 = yes       | 1
          |            | zmn is user supplied| 1 = no        |
------------------------------------------------------------------------------

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