Graphics: Getting started graphics library overview plot2d Plot a curve Example: plot2d(); plot2d2 Plot a curve as step function Example: plot2d2(); plot2d3 Plot a curve with vertical bars Example: plot2d3(); plot2d4 Plot a curve with arrows Example: plot2d4(); fplot2d Plot a curve defined by a function Example: fplot2d(); champ 2D vector field Example: champ(); champ1 2D vector field with colored arrows Example: champ1(); fchamp Direction field of a 2D first order ODE Example: fchamp(); contour2d Level curves of a surface on a 2D plot fcontour2d Level curves of a surface defined by a function on a 2D plot Example: fcontour2d(); grayplot 2D plot of a surface using colors Example: grayplot(); fgrayplot 2D plot of a surface defined by a function using colors Example: fgrayplot(); Sgrayplot Smooth 2D plot of a surface using colors Example: Sgrayplot(); Sfgrayplot Smooth 2D plot of a surface defined by a function using colors Example: Sfgrayplot(); xgrid Add a grid on a 2D plot Example: x=[0:0.1:2*%pi]'; plot2d(sin(x));xgrid(5) errbar Add vertical error bars on a 2D plot Example: errbar(); histplot Plot a histogram Example: histplot(); Matplot 2D plot of a matrix using colors Example: Matplot(); plot3d Plot a surface Example: plot3d(); plot3d1 Plot a surface with gray or color level Example: plot3d1(); fplot3d Plot a surface defined by a function Example: fplot3d(); fplot3d1 Plot a surface defined by a function with gray or color level Example: fplot3d1(); param3d Plot one curve Example: param3d(); param3d1 Plots curves Example: param3d1(); contour Level curves on a 3D surface Example: contour(); fcontour Level curves on a 3D surface defined by a function Example: fcontour(); hist3d 3D representation of a histogram Example: hist3d(); genfac3d Compute facets of a 3D surface Example: genfac3d(); eval3dp Compute facets of a 3D surface Example: p1=linspace(0,2*%pi,10); p2=linspace(0,2*%pi,10); deff("[x,y,z]=scp(p1,p2)",["x=p1.*sin(p1).*cos(p2)";.. "y=p1.*cos(p1).*cos(p2)";.. "z=p1.*sin(p2)"]) [Xf,Yf,Zf]=eval3dp(scp,p1,p2); plot3d(Xf,Yf,Zf) geom3d Projection from 3D on 2D after a 3D plot Example: deff("[z]=surface(x,y)","z=sin(x)*cos(y)") t=%pi*(-10:10)/10; // 3D plot of the surface fplot3d(t,t,surface,35,45,"X@Y@Z") // now (t,t,sin(t).*cos(t)) is a curve on the surface // which can be drawn using geom3d and xpoly [x,y]=geom3d(%pi/2,0,surface(%pi/2,0)) xpoly Draw a polyline or a polygon xpolys Draw a set of polylines or polygons xrpoly Draw a regular polygon xsegs Draw unconnected segments xfpoly Fill a polygon xfpolys Fill a set of polygons xrect Draw a rectangle xfrect Fill a rectangle xrects Draw or fill a set of rectangles xarc Draw a part of an ellipse xarcs Draw parts of a set of ellipses xfarc Fill a part of an ellipse xfarcs Fill parts of a set of ellipses xarrows Draw a set of arrows xstring Draw strings xstringl Compute a box which surrounds strings xstringb Draw strings into a box Example: xstringb(); xtitle Add titles on a graphics window Example: xtitle(); titlepage Add a title in the middle of a graphics window xinfo Draw an info string in the message subwindow drawaxis Draw an axis graduate Pretty axis graduations plotframe Plot a frame with scaling and grids This function is obsolete. isoview Set scales for isometric plot (do not change the size of the window) This function is obsolete. square Set scales for isometric plot (change the size of the window) scaling Affine transformation of a set of points rotate Rotation of a set of points xsetech Set the sub-window of a graphics window for plotting subplot Divide a graphics window into a matrix of sub-windows xgetech Get the current graphics scale xchange Transform real to pixel coordinates colormap Using colormaps getcolor Dialog to select colors in the current colormap addcolor Add new colors to the current colormap graycolormap Linear gray colormap hotcolormap Red to yellow colormap xset Set values of the graphics context This function is obsolete. xget Get current values of the graphics context This function is obsolete. xlfont Load a font in the graphics context or query loaded font xsave Save graphics into a file xload Load a saved graphics xs2bmp Export graphics using the BMP format xs2emf Export graphics using the EMF format Only under Windows. xs2eps Export graphics using the EPS format xs2gif Export graphics using the GIF format xs2jpg Export graphics using the JPG format xs2pdf Export graphics using the PDF format xs2png Export graphics using the PNG format xs2ppm Export graphics using the PPM format xs2ps Export graphics using the PS format xs2svg Export graphics using the SVG format clf Clear or reset the current graphic figure (window) to default values xclear Clear a graphics window Function xclear is obsolete. driver Select a graphics driver xinit Initialisation of a graphics driver xend Close a graphics session replot Redraw the current graphics window with new boundaries xpause Suspend Scilab show_window Raise the current graphics window xdel Delete a graphics window winsid Return the list of graphics windows xname Change the name of the current graphics window xclick Wait for a mouse click or an event in a graphic window locate Mouse selection of a set of points xgetmouse Get the mouse events and current position edit_curv Interactive graphics curve editor bode Bode plot Example: s=poly(0,'s') h=syslin('c',(s^2+2*0.9*10*s+100)/(s^2+2*0.3*10.1*s+102.01)) clf();bode(h,0.01,100); gainplot Magnitude plot Example: s=poly(0,'s') h1=syslin('c',(s^2+2*0.9*10*s+100)/(s^2+2*0.3*10.1*s+102.01)) h2=syslin('c',(s^2+2*0.1*15.1*s+228.01)/(s^2+2*0.9*15*s+225)) clf();gainplot([h1;h2],0.01,100,['h1';'h2']) title('Gainplot'); nyquist Nyquist plot Example: s=poly(0,'s') h=syslin('c',(s^2+2*0.9*10*s+100)/(s^2+2*0.3*10.1*s+102.01)); h1=h*syslin('c',(s^2+2*0.1*15.1*s+228.01)/(s^2+2*0.9*15*s+225)) nyquist(h1) ax=gca(); h_h=ax.children($).children(2); tip=datatipCreate(h_h,[1.331,0.684]); datatipSetOrientation(tip,"upper left"); m_circle Plot the complex plane iso-gain contours of y/(1+y) This function is obsolete. Example: m_circle(); hallchart Hall chart Example: hallchart(); nicholschart Nichols chart Example: nicholschart(); black Black's diagram Example: s=poly(0,'s'); sl=syslin('c',5*(1+s)/(.1*s^4+s^3+15*s^2+3*s+1)) clf();black(sl,0.01,10); evans Evans root locus Example: evans(); sgrid s-plane grid lines Example: sgrid(0:0.2:1,[0.2 0.6 1 1.7 2]) plzr pole-zero plot Example: s=poly(0,'s'); n=[1+s 2+3*s+4*s^2 5; 0 1-s s]; d=[1+3*s 5-s^3 s+1;1+s 1+s+s^2 3*s-1]; h=syslin('c',n./d); plzr(h); zgrid zgrid plot Example: zgrid();