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-rw-r--r--fft.txi2
1 files changed, 2 insertions, 0 deletions
diff --git a/fft.txi b/fft.txi
index c73f103..80c19e9 100644
--- a/fft.txi
+++ b/fft.txi
@@ -10,11 +10,13 @@ returns an array of complex numbers comprising the
@cindex Discrete Fourier Transform
@end defun
+
@defun fft-1 array
@code{fft-1} returns an array of complex numbers comprising the
inverse Discrete Fourier Transform of @var{array}.
@end defun
+
@noindent
@code{(fft-1 (fft @var{array}))} will return an array of values close to
@var{array}.