Learn more about Partial Differential Equation Toolbox

dst, idst - Discrete sine transform

Syntax

y=dst(x)
y=dst(x,n)
x=idst(y)
x=idst(y,n)

Description

The dst function implements the following equation:

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 2^_m - 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.

The idst function implements the following equation:

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 2^m - 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

poiasma	Partial Differential Equation Toolbox
poiindex	Partial Differential Equation Toolbox
poisolv	Partial Differential Equation Toolbox

decsg

hyperbolic

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