Node:Specifications, Next:Miscellaneous Commands, Previous:Filter Parameters, Up:Simple Interface
| band a b | Function |
| Create a band, i.e., a representation for the interval of frequencies [a..b]. |
| limit-< band u | Command |
| limit-< band u w | Command |
| limit-<= band u | Command |
| limit-<= band u w | Command |
These commands establish a specification of the form H(f) <=
u(f) in the band band. There is no difference between
limit-< and limit-<=. The weight w is an optional
function of the frequency f. The default weight is 1. If
band is a number, it is converted internally into the band
consisting of the single frequency band. If u is a number,
it is converted internally into the constant function (lambda (f)
u). A similar conversion applies to the weight.
|
| limit-> band u | Command |
| limit-> band u w | Command |
| limit->= band u | Command |
| limit->= band u w | Command |
These commands establish a specification of the form H(f) >=
u(f) in the band band. The remaining parameters are as in
the command limit-<.
|
| limit-= band u | Command |
| limit-= band u w | Command |
Shortcut for the sequence of commands (limit-< band u
w) and (limit-> band u w).
|
| upward band | Command |
| downward band | Command |
| These commands establish a specification of the form H'(f) >= u(f) and H'(f) <= u(f) (respectively) in the band band. |
| concave-up band | Command |
| concave-down band | Command |
| These commands establish a specification of the form H"(f) >= u(f) and H"(f) <= u(f) (respectively) in the band band. |