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| Keywords: Swastica curve3.png The swastika curve self-made with MATLAB 05 54 17 January 2008 UTC Oleg Alexandrov Swastika curve svg MATLAB source code <source lang matlab > Swastika curve function main linewidth and font size lw 4; fs 25; colors red 0 867 0 06 0 14; blue 0 129 205/256; green 0 200 70/256; black 0 0 0; white 0 99 1 1 1; Set up the plotting window figure 1 ; clf; set gca 'fontsize' fs 'linewidth' lw/4 ; hold on; axis equal; grid on; N 500; number of points don't make it big code will be slow Lx1 -2; Lx2 2; Ly1 -2; Ly2 2; X Y meshgrid linspace Lx1 Lx2 N linspace Ly1 Ly2 N ; X and Y coordinates Ncurves 10; A linspace 0 1 Ncurves ; figure 2 ; clf; hold on; axis equal; axis off; x X; y Y; Z y 4-x 4-x y; graph the curves using 'contour' in figure 2 figure 2 ; c stuff contour X Y Z 0 0 ; extract the curves from c and graph them in figure 1 using 'plot' need to do this kind of convoluted work since plot2svg can't save the result of 'contour' but can save the result of 'plot' m n size c ; while n > 0 l c 2 1 ; x c 1 2 l+1 ; y c 2 2 l+1 ; get x and y of contours figure 1 ; plot x y 'color' red 'linewidth' lw ; c c l+2 n ; m n size c ; end figure 1 ; axis equal; axis Lx1 Lx2 Ly1 Ly2 ; set gca 'XTick' -2 -1 0 1 2 ; set gca 'YTick' -2 -1 0 1 2 ; set gca 'GridLineStyle' '--' ; saveas gcf 'Swastica_curve3 eps' 'psc2' </source> quartic curves Images with Matlab source code | ||||
