MATLAB Function Reference

logspace

Generate logarithmically spaced vectors

Syntax

• y = logspace(a,b)
  y = logspace(a,b,n)
  y = logspace(a,pi)
  

Description

The logspace function generates logarithmically spaced vectors. Especially useful for creating frequency vectors, it is a logarithmic equivalent of linspace and the ":" or colon operator.

y = logspace(a,b) generates a row vector y of 50 logarithmically spaced points between decades 10^a and 10^b.

y = logspace(a,b,n) generates n points between decades 10^a and 10^b.

y = logspace(a,pi) generates the points between 10^a and pi, which is useful for digital signal processing where frequencies over this interval go around the unit circle.

Remarks

All the arguments to logspace must be scalars.

See Also

linspace

The colon operator :

logm

lookfor

© 1994-2005 The MathWorks, Inc.