Values for these parameters can be set by using the subroutines NNSETI, NNSETR, NNSETRD, and NNSETC for Fortran programs or the functions c_nnseti, c_nnsetr, c_nnsetrd, and c_nnsetc for C programs.
| | | | Parameter | parameter | | | name | type | description | legal values | default value | | | | ------------------------------------------------------------------------------ adf | int | flags if the data | 0 = no | 0 | | file of algorithmic | 1 = yes | | | info for display is | | | | produced (see | | | | parameter alg). | | ------------------------------------------------------------------------------ alg | char | file name for the | any file name | "nnalg.dat" | | algorithm display | | | | tool (see parameter | | | | adf). | | ------------------------------------------------------------------------------ asc | int | flags if automatic | 0 = no | 1 | | scaling is allowed | 1 = yes | ------------------------------------------------------------------------------ bI | float | tautness factor that| >= 1. | 1.5 | | increases the | | | | effect of the | | | | gradients as bI | | | | increases. | | ------------------------------------------------------------------------------ bJ | float | tautness factor that| >= 1. | 7.0 | | decreases the | | | | breadth of the | | | | region affected by | | | | the gradients. | | ------------------------------------------------------------------------------ dup | int | controls whether | 0 = no | 0 | | duplicate input | 1 = yes | | | coordinates are | | | | allowed. | | ------------------------------------------------------------------------------ ext | int | flags whether | 0 = no | 1 | | extrapolation is | 1 = yes | | | allowed outside the | | | | convex hull. | | ------------------------------------------------------------------------------ hor | float | Specifies the | >= 0. | 0.1*(extent of | | amount of horizontal| | X values in | | overlap to be | | output grid in | | included outside of | | the natgrid | | the current region. | | invocation) ------------------------------------------------------------------------------ igr | int | flag indicating if | 0 = no | 0 | | gradients are to be | 1 = yes | | | computed. | | ------------------------------------------------------------------------------ magx | float | scale factor for | > 0. | 1.0 | | X coordinate values.| | ------------------------------------------------------------------------------ magy | float | scale factor for | > 0. | 1.0 | | Y coordinate values.| | ------------------------------------------------------------------------------ magz | float | scale factor for | > 0. | 1.0 | | Z coordinate values.| | ------------------------------------------------------------------------------- non | int | flags whether in- | 0 = yes | 0 | | terpolated values | 1 = no | | | are allowed to be | | | | negative. | | ------------------------------------------------------------------------------ nul | float | the value to be used| Any float | 0.0 | | on output for points| | | | outside of the | | | | convex hull when | | | | extrapolation is not| | | | allowed. | | ------------------------------------------------------------------------------ rad | int | flags if slopes and | 0 = radians | 0 | | aspects are returned| 1 = degrees | | | in radians or | | | | degrees. | | ------------------------------------------------------------------------------ sdi | int | flags if slopes and | 0 = no | 0 | | aspects are computed| 1 = yes | ------------------------------------------------------------------------------ upd | int | flags if the output | 0 = N to S | 1 | | array goes from | 1 = S to N | | | south to north or | | | | north to south. | | ------------------------------------------------------------------------------ ver | float | Specifies the | >= 0. | 0.1*(extent of | | amount of vertical | | Y values in the | | overlap to be | | output grid in | | included outside of | | the natgrid | | the current region. | | invocation) ------------------------------------------------------------------------------ xas | float | Contains the | > 0. | 1. | | scale value for | | | | automatic scaling | | | | of X values in the | | | | most recent | | | | interpolation call. | | ------------------------------------------------------------------------------ yas | float | Contains the | > 0. | 1. | | scale value for | | | | automatic scaling | | | | of Y values in the | | | | most recent | | | | interpolation call. | | ------------------------------------------------------------------------------ zas | float | Contains the | > 0. | 1. | | scale value for | | | | automatic scaling | | | | of Z values in the | | | | most recent | | | | interpolation call. | | ------------------------------------------------------------------------------