plot-online.blogspot.com
GNUPLOT Quick Reference: Spherical harmonics
http://plot-online.blogspot.com/2013/01/spherical-harmonics.html
Spherical harmonics Y(u,v)=sqrt(5.0/(4.0*pi) *0.5*(3.0*cos(u)* 2-1). Set parametric set urange [0:pi] set vrange [0:2*pi] set isosample 36,36 set ticslevel 0 set size 0.65,1.0 Y(u,v)=sqrt(5.0/(4.0*pi) *0.5*(3.0*cos(u)* 2-1) Fx(u,v)=sin(u)*cos(v)*abs(Y(u,v) Fy(u,v)=sin(u)*sin(v)*abs(Y(u,v) Fz(u,v)=cos(u)*abs(Y(u,v) splot Fx(u,v),Fy(u,v),Fz(u,v). Splot-parametric-spherical-harmonics-AbsY20 ( TXT ). Splot-parametric-spherical-harmonics-AbsY20 ( Plot ). MAXIMA : Spherical harmonics. Cos(t) * 3, (sin(t) * 3.
spice-online.blogspot.com
SPICE Online Circuit Simulator: CMOS Transmission Gate
http://spice-online.blogspot.com/2014/03/cmos-transmissiongate.html
SPICE Online Circuit Simulator. CMOS-TransmissionGate ( DXF Format ). CMOS-TransmissionGate ( TXT ). CMOS-TransmissionGate ( Online ). SPICE is a circuit simulation program for nonlinear dc, nonlinear transient, and linear ac analyses. Op-Amp Hysteresis Inverting Gate. R language References for statistical computing and graphics. Octave control bode phase.m - Bode Plotting. Fourier transform - plane - square. Quick Reference : PostScript Language. Polar Plotting : Archimedean Spiral.
octave-online.blogspot.com
OCTAVE Quick Reference: octave_control_bode_phase.m -- Bode Plotting
http://octave-online.blogspot.com/2013/11/bode-bode-plotting-of-transfer-function.html
Octave control bode phase.m - Bode Plotting. Octave control bode phase. Function: [mag, pha, w] = bode. Function: [mag, pha, w] = bode. Bode diagram of frequency response. Function: bode phase plot. A Bode plot is a graph of the transfer function of a linear, time-invariant system versus frequency, plotted with a log-frequency axis, to show the system's frequency response. Octave control nyquist.m. Labels: control bode phase. Octave is primarily intended for numerical computations. Roots of the Polynomial.
maxima-online.blogspot.com
MAXIMA Quick Reference: Fourier transform - plane - square
http://maxima-online.blogspot.com/2013/02/fourier-transform-plane-square.html
Fourier transform - plane - square. Integrate(integrate(1*exp(-%i*2*%pi*(u*x v*y) ,x,-1/2,1/2),y,-1/2,1/2); realpart(%); plot3d(%, [u,-4,4],[v,-4,4],[grid,100,100]);. Fourier transform - 2D integrate(integrate(h(x,y)*exp(-%i*2*%pi*(u*x v*y) ,x,-inf,inf),y,-inf,inf); square h(x,y):= ( unit step( x (1/2) ) - unit step( x-(1/2) ) ) * ( unit step( y (1/2) ) - unit step( y-(1/2) ) ); plot3d(h(x), [x,-10,10],[y, -10, 10]);. Maxima is a Computer Algebra System. Expansion into Partial Fractions. Plot 2D - polar.