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idcost

Inverse cosine transform

Description

Takes the column-by-column inverse discrete cosine transform of Y.

Usage

idcost(Y)

Arguments

Y

Input cosine transform

Value

Time series

Author(s)

Jonathan M. Lees<jonathan.lees@unc.edu>

References

Aster, R.C., C.H. Thurber, and B. Borchers, Parameter Estimation and Inverse Problems, Elsevier Academic Press, Amsterdam, 2005.

See Also

dcost

Examples

x <- 1:4

### compare fft with cosine transform
     fft(x)
    
zig = dcost(x)
zag = idcost(zig)
PEIP

Geophysical Inverse Theory and Optimization

v2.2-3
GPL (>= 2)
Authors
Jonathan M. Lees [aut, cre]
Initial release
2020-08-28

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