expl

[Function]
  (`expl` power [`:y0` n] [`:y1` n] [`:base` n])

Returns an exponential value between y0 and y1 according to power, which ranges from 0 to 1. When power is 0 y0 is returned, when power is 1 y1 is returned. y0 and y1 default to 0 and 1, respectively. base determines the slope of the exponential curve, if it is less than 1 then the exponential curve is concave, otherwise a convex curve is produced. The default value of base is 2.

    cm> (expl 0 5 1 1/256)
    0.0
    cm> (expl 1 5 1 1/256)
    5.0
    cm> (expl .5 5 1 1/256)
    1.235
    cm> ;;;
    create
    cm> envelope
    ramping
    cm> from
    3
    cm> to
    .5
    cm> (loop for i to 1 by .2 append (list i (expl i 3 .5 1/256)))
    (0 3.0 0.2 1.31 0.4 0.76 0.6 0.58 0.8 0.51 1.0 0.5)
    cm>

#### See Also:

- `decimals``` [Function]
- `explseg``` [Function]
- `explsegs``` [Function]
- `fit``` [Function]
- `quantize``` [Function]
- `rescale``` [Function]