Question

我谨以

至今,我制作了一张图表,显示符号编号点(左)和平等点(右)之间的连接:alt 文本http://img29.imageshack.us/img29/9780/ldpc.jpg 并且希望从象征到平等节点和后方的亲密点。

该数字采用以下方法计算:

function drawVertices(H)
hold on;
nodesCount = size(H);
parityNodesCount = nodesCount(1);
symbolNodesCount = nodesCount(2);
symbolPoints = zeros(symbolNodesCount, 2);
symbolPoints(:, 1) = 0;
for i = 0 : symbolNodesCount - 1
    ji = symbolNodesCount - i;
    scatter(0, ji)
    symbolPoints(i + 1, 2) = ji;

end;
parityPoints = zeros(parityNodesCount, 2);
parityPoints(:, 1) = 10;
for i = 0 : parityNodesCount - 1
    ji = parityNodesCount - i;
    y0 = symbolNodesCount/2 - parityNodesCount/2;
    scatter(10, y0 + ji)
    parityPoints(i + 1, 2) = y0 + ji;
end;
axis([-1 11 -1 symbolNodesCount + 2]);
axis off

%connect vertices
d = size(H);
for i = 1 : d(1)
    for j = 1 : d(2)
        if(H(i, j) == 1)
            plot([parityPoints(i, 1) symbolPoints(j, 1)], [parityPoints(i, 2) symbolPoints(j, 2)]);
        end;
    end;
end;

因此,我要在这里做的是,添加另一种方法,即起点(x和 y)和终点站,作为论点,并从一开始即按照所显示的路线结束和返回旅行圈(dot)。

如果你能显示解决办法,或建议对口腔模拟作任何有益的指导,我将不胜感激。

谢谢!

Answer 1

我认为,最好的学习方式就是例子。因此,我建议大家看一下“demolorenz。摘自MATLAB:

edit lorenz

其他cool animations, see for orbits.m and swinger.m demos part of Cleve Moler s book: MATLAB 试验

我在这里简单地描述了一条沿着通俗道路前进的一点。座标的锅炉 down到使用<代码>EraseMode, 并更新<代码>xorXData和YData每一代谢点:

%# coordinates
t = (0:.01:2*pi) ;         %#  fix SO syntax highlight
D = [cos(t) -sin(t)];

%# setup a figure and axis
hFig = figure( Backingstore , off ,  DoubleBuffer , on );
hAx = axes( Parent ,hFig,  XLim ,[-1 1],  YLim ,[-1 1], ...
           Drawmode , fast ,  NextPlot , add );
axis(hAx,  off , square )

%# draw circular path
line(D(:,1), D(:,2),  Color ,[.3 .3 .3],  LineWidth ,1);

%# initialize point
h = line( XData ,D(1,1),  YData ,D(1,2),  EraseMode , xor ,  ...
         Color , r ,  marker , . ,  MarkerSize ,50);
%# init text
hTxt = text(0, 0, num2str(t(1)),  FontSize ,12,  EraseMode , xor );

i=0;
while true
    i = rem(i+1,numel(t)) + 1;               %# circular increment
    set(h, XData ,D(i,1),  YData ,D(i,2))    %# update X/Y data
    set(hTxt, String ,num2str(t(i)))         %# update angle text
    drawnow                                  %# force refresh
    if ~ishandle(h), return; end             %# in case you close the figure
end

关于所用参数的详细解释( EraseMode,Backingstore,DoubleBuffer , ., 参见 >animation Guide 。

Answer 2

http://www.mathwork.com/access/helpdesk/help/techdoc/ref/comet.html“rel=“nofollow noreferer”>。

t = 0:.01:2*pi;
x = cos(2*t).*(cos(t).^2);
y = sin(2*t).*(sin(t).^2);
comet(x,y);

友情链接