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## [Help-gsl] Complex vector arithmetic

**From**: |
Liam Healy |

**Subject**: |
[Help-gsl] Complex vector arithmetic |

**Date**: |
Sun, 14 Sep 2008 18:12:36 -0400 |

I notice that some vector functions on complex numbers do not exist,
though I can't think of a reason for this. For example, these do not exist:
gsl_vector_complex_add
gsl_vector_complex_float_add
gsl_vector_complex_long_double_add
but all real types do, as well as the corresponding matrix functions:
gsl_matrix_complex_add
gsl_matrix_complex_float_add
gsl_matrix_complex_long_double_add
I made a table of arithmetic functions and definitions I could find in
the library:
real vector real matrix complex vector complex matrix
_add yes yes no yes
_sub yes yes no yes
_mul yes no no no
_mul_elements no yes no yes
_div yes no no no
_div_elements no yes no yes
_scale yes no no yes
_add_constant yes no no yes
I can see that _mul_elements or _dev_elements is used only for
matrices and _mul or _div used only for vectors, but I cannot see why
vectors do not have definitions for complex types but matrices do.
Is there a reason for the absence of definitions for complex vectors?
(GSL 1.11 on Debian Lenny amd64)
Liam

**[Help-gsl] Complex vector arithmetic**,
*Liam Healy* **<=**