Contents
Each subroutine in SLATEC is tagged as belonging to one of 13 subpackages. Some of these subpackages are also well known as free-standing FORTRAN subprogram libraries, including BLAS, EISPACK, FFTPACK, LINPACK and QUADPACK. The following table shows all subpackages and the number of subroutines they contain:
| subpackage | number of routines | separately available in Netlib | purpose |
| BLAS | 114 | yes | Basic linear algebra |
| DASSL | 16 | no | solve differential/algebraic equation systems |
| DEPAC | 10 | no | solve ordinary differential equations (Runge-Kutta method and similar) |
| EISPACK | 71 | yes | eigenvalues and eigenvectors |
| FFTPACK | 48 | yes | fast Fourier transform |
| FISHPACK | 19 | yes | use cyclic reduction to directly solve second- and fourth-order finite difference approximations to separable elliptic Partial Differential Equations in various coordinate systems |
| FNLIB | 161 | yes, as 'FN' | special functions |
| LINPACK | 128 | yes | linear algebra, outdated |
| PCHIP | 41 | no | piecewise cubic Hermite interpolation |
| QUADPACK | 59 | yes | numerical integration of one-dimensional functions |
| SDRIVE | 36 | no | solve ordinary differential equations |
| SLAP | 124 | yes | sparse linear algebra package |
| XERROR | 17 | no | error handling |
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