signal.modulate(isig) modulates the signal by the signal isig.

signal.multiply(f) multiplies every sample of the signal with f.

signal.sampleHold(p) samples and holds the signal with a periode of p.
The first periode starts with the first sample of the signal.

signal.dft() calculates the discrete fourier transformation of the signal.
The original signal will be replaced by the transformation.
The size of the signal must be a power of 2.

signal.falten(isig) folds the signal with the signal isig.

signal.upsample(p) upsamples the signal by the factor p.
The new signal size will be increased by the factor of p.
The samples between the original samples will be filled with zeros.

signal.downsample(g) downsamples the signal by the factor g.
The samples between k*g and (k+1)*g will be removed from the signal.
The parameter g must be greater than zero.
The size of the new signal will be reduced by the factor of g.

signal.interleave(isig) interleaves the signal with the signal isig.

signal.magnitudeAndPhase() calculates the magnitude and phase of the signal.
The magnitude is stored in the real part of the signal.
The phase is stored in the imaginary part of the signal

signal.hanningWindow() multiplies the signal with a Hanning Window.

signal.welchWindow() multiplies the signal with a Welch Window.

iterator(function(n,real,imag){}) The iterator can be used to iterate a callback function over the signal.

Example for the use in firebug:

var a = 8;
sig.iterate(function(n,real,imag){
real[n] = a;
imag[n] = 2;
});

graph.draw();

signal.random(amplitude) replaces the samples of the signal by random samples with values between -amplitude and amplitude.

signal.constant(amplitude) set the samples of the signal equal to amplitude.

signal.unitSampleSequence(n) sets the sample with the position 'n' to one and sets all other samples to zero.

signal.unitStep(n) set the samples with position greater or equal to n to one and sets all other samples to zero.

signal.exponential(amplitude) set the samples of the signal equal to 'amplitude^position'.

signal.sin(amplitude,omega,theta) sets the signal equal to a sinus wave with amplitude 'amplitude',rate 'omega' and phase 'theta'.

signal.addSin(amplitude,omega,theta) adds a sinus signal with amplitude 'amplitude',rate 'omega' and phase 'theta' to the current signal.

signal.sinusWelle(amplitude,number,theta) sets the signal equal to a sinus wave with 'number' periodes and an amplitude 'amplitude' and a starting phase of 'theta'.

signal.si(number,delay) sets the samples of the sinc function (sin(n)/n).
Number defines the number of zero values of the signal.
Delay defines the delay of the signal in samples.

signal.linear(c,a) sets the samples of the signal equal to c+position*a.

signal.rechtEckSignal(amplitude,number) sets the signal to a Rechtecksignal with amplitude 'amplitude' and 'number' of periodes.

signal.saegeZahn(amplitude,number) sets the signal to a Saegezahnsignal with amplitude 'amplitude' and 'number' of periodes.

signal.clone() returns a new signal with the same name,size and samples as the original signal.

Excample:
sig2 = sig.clone();
graph.draw();

signal1.transcript(signal2) sets the size of signal1 equal to the size of signal2 and transcripts the signal2 into the signal1.

Excample:
sig1.transcript(sig2);
graph.draw();

signal.clean() sets all samples of the signal to zero.

signal.swap() excanges the real and the imaginary parts of the signal.

signal.getFirstSample() sets the pointer "position" to zero and returns the first sample.

signal.getNextSample() increments the pointer "position" by one and returns the sample of the incremented pointer.
The function returns "undefined" if the position > length.

signal.getSample(pos) returns the sample of the position pos.
The function returns "undefined" if the position > length.

signal.getReal(pos) returns the real part of sample in the position pos.
The function returns "undefined" if the position > length.

signal.getImag(pos) returns the imag part of sample in the position pos.
The function returns "undefined" if the position > length.

signal.setReal(pos,value) sets the real part of sample in the position pos to the value.

signal.setImag(pos,value) sets the imag part of sample in the position pos to the value.

signal.length() returns the length of the signal.

signal.getName returns the name of the signal.

signal.print() shows the signal samples in a alert window.

1) Install the firefox plugin firebug.
2) Open firebug on this page.
3) Open the console in firebug.
4) Input "sig.clean(); sig.constant(9); graph.draw();" into the console.
5) Press "Run" in the console.
6) The graph will show a constant signal.