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dst, idst

Discrete sine transform

Syntax

Description

y=dst(x) computes the discrete sine transform of the columns of x. For best performance speed, the number of rows in x should be 2m - 1, for some integer m.

y=dst(x,n) pads or truncates the vector x to length n before transforming.

If x is a matrix, the dst operation is applied to each column.

x=idst(y) calculates the inverse discrete sine transform of the columns of y. For best performance speed, the number of rows in y should be 2m - 1, for some integer m.

x=idst(y,n) pads or truncates the vector y to length n before transforming.

If y is a matrix, the idst operation is applied to each column.

For more information about this algorithm, see Fast Solution of Poisson's Equation.

See Also

poisolv, poiasma, poiindex


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