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.
postscript-online.blogspot.com
Quick Reference :: PostScript Language: Polar Plotting :: Archimedean Spiral
http://postscript-online.blogspot.com/2010/02/math-polar-archimedean-spiral.html
Quick Reference : PostScript Language. Polar Plotting : Archimedean Spiral. Example : Polar Plotting - Archimedean Spiral. Newpath 300 700 translate 0 0 moveto /span 1 def /t -360 def /r { t 1 mul} def /x { t cos r mul 0.8 mul} def /y { t sin r mul 0.8 mul} def x y moveto 720 {/t t span add def x y lineto } repeat stroke showpage. Online CAD Utility, For the layout of graphics and text. The PostScript programming language is designed to describe the layout of graphics and text on the printed page.
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.
povray-online.blogspot.com
POV-Ray Quick Reference: INDEX
http://povray-online.blogspot.com/2012/10/index.html
POV-Ray is The Persistence of Vision Ray Tracer. Data and Function Plotting Utility. Circuit Design and Analysis. Simple template. Template images by gaffera.
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.
