Created xml help files

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diff --git a/macros/hilbert1.sci b/macros/hilbert1.sci
index 864067f..1c0fe0e 100644
--- a/macros/hilbert1.sci
+++ b/macros/hilbert1.sci
@@ -1,4 +1,26 @@
 function h= hilbert1(f, varargin)
+//Analytic extension of real valued signal.
+//Calling Sequence
+// h= hilbert1(f)
+// h= hilbert1(f,N)
+// h= hilbert1(f,N,dim)
+//Parameters 
+//f: real or complex valued scalar or vector
+//N: The result will have length N
+//dim : It analyses the input in this dimension
+//Description
+//h = hilbert (f) computes the extension of the real valued signal f to an analytic signal. If f is a matrix, the transformation is applied to each column. For N-D arrays, the transformation is applied to the first non-singleton dimension.
+//
+//real (h) contains the original signal f. imag (h) contains the Hilbert transform of f.
+//
+//hilbert1 (f, N) does the same using a length N Hilbert transform. The result will also have length N.
+//
+//hilbert1 (f, [], dim) or hilbert1 (f, N, dim) does the same along dimension dim.
+//Examples
+//## notice that the imaginary signal is phase-shifted 90 degrees
+// t=linspace(0,10,256);
+// z = hilbert1(sin(2*pi*0.5*t));
+// grid on; plot(t,real(z),';real;',t,imag(z),';imag;');
 
 funcprot(0);
 rhs= argn(2);