MATLAB中不同的轴位置

Question

我正在尝试在Matlab图中移动轴位置.我想实现与此类似的东西(在gnuplot中完成):

我不知道这是否可能,或者我可能找到答案,所以任何帮助都将非常感激.

Answer 1

嗯....

所以让我们的情节:

x = zeros(1,21); y = -10:10; z = y/2;
figure; plot3(x,y,z); % a line from (0,-10,-5) to (0,10,5) similar to the example

好吧,一个问题是matlab不会像你在那里那样自动绘制坐标轴.这里讨论: 如何在MATLAB图中显示x和y轴？

为了绘制那些(3D),一个便宜的解决方案是:

locs = axis; % get current axis boundaries
hold on; 
plot3([locs(1) locs(2)], [0 0], [0 0]); %plot xaxis, a line between(-x,0,0) and (x,0,0);
plot3([0 0], [locs(3) locs(4)], [0 0]); %plot y axis, the line (0,-y,0) and (0,y,0);
plot3([0 0], [0 0], [locs(5) locs(6)]); % plot z axis
hold off

就像那个Gnu情节一样,3D matlab图是"在一个盒子里".与Gnu图不同,matlab框没有概述.如果你想要概述你也必须绘制那些线......呃.

% lets plot the 12 lines to make this box in black ('k');
hold on;
% hold x constant and plot 4 parallel-to-x lines;
plot3([locs(1) locs(2)], [locs(3) locs(3)], [locs(5) locs(5)],'k'); % (-x,-y,-z) to (x,-y,-z)
plot3([locs(1) locs(2)], [locs(3) locs(3)], [locs(6) locs(6)],'k');
plot3([locs(1) locs(2)], [locs(4) locs(4)], [locs(5) locs(5)],'k');
plot3([locs(1) locs(2)], [locs(4) locs(4)], [locs(6) locs(6)],'k');
% plot parallel-to-y lines
plot3([locs(1) locs(1)], [locs(3) locs(4)], [locs(5) locs(5)],'k');
plot3([locs(1) locs(1)], [locs(3) locs(4)], [locs(6) locs(6)],'k');
plot3([locs(2) locs(2)], [locs(3) locs(4)], [locs(5) locs(5)],'k');
plot3([locs(2) locs(2)], [locs(3) locs(4)], [locs(6) locs(6)],'k');
% plot parallel-to-z lines
plot3([locs(1) locs(1)], [locs(3) locs(3)], [locs(5) locs(6)],'k');
plot3([locs(1) locs(1)], [locs(4) locs(4)], [locs(5) locs(6)],'k');
plot3([locs(2) locs(2)], [locs(3) locs(3)], [locs(5) locs(6)],'k');
plot3([locs(2) locs(2)], [locs(4) locs(4)], [locs(5) locs(6)],'k');
hold off;

现在我们有了盒子;

如果我们只想要y> 0的区域,z> 0; 我们可以使用axis命令.绘制完所有其他线条之后使用轴确实让我感到困惑,所以我会在开始时决定你的极限.

全部一起:

figure; 
plot3(x,y,z); % a line from (0,-10,-5) to (0,10,5) similar to the example
locs = axis;
axis([locs(1) locs(2) 0 locs(4) 0 locs(6)]);
locs = axis;

hold on; 
% plot axis
plot3([locs(1) locs(2)], [0 0], [0 0]); %plot xaxis, a line between(-x,0,0) and (x,0,0);
plot3([0 0], [locs(3) locs(4)], [0 0]); %plot y axis, the line (0,-y,0) and (0,y,0);
plot3([0 0], [0 0], [locs(5) locs(6)]); % plot z axis

% plot box
% hold x constant and plot 4 parallel-to-x lines;
plot3([locs(1) locs(2)], [locs(3) locs(3)], [locs(5) locs(5)],'k'); % (-x,-y,-z) to (x,-y,-z)
plot3([locs(1) locs(2)], [locs(3) locs(3)], [locs(6) locs(6)],'k');
plot3([locs(1) locs(2)], [locs(4) locs(4)], [locs(5) locs(5)],'k');
plot3([locs(1) locs(2)], [locs(4) locs(4)], [locs(6) locs(6)],'k');
% plot parallel-to-y lines
plot3([locs(1) locs(1)], [locs(3) locs(4)], [locs(5) locs(5)],'k');
plot3([locs(1) locs(1)], [locs(3) locs(4)], [locs(6) locs(6)],'k');
plot3([locs(2) locs(2)], [locs(3) locs(4)], [locs(5) locs(5)],'k');
plot3([locs(2) locs(2)], [locs(3) locs(4)], [locs(6) locs(6)],'k');
% plot parallel-to-z lines
plot3([locs(1) locs(1)], [locs(3) locs(3)], [locs(5) locs(6)],'k');
plot3([locs(1) locs(1)], [locs(4) locs(4)], [locs(5) locs(6)],'k');
plot3([locs(2) locs(2)], [locs(3) locs(3)], [locs(5) locs(6)],'k');
plot3([locs(2) locs(2)], [locs(4) locs(4)], [locs(5) locs(6)],'k');
hold off;

我相信你可以做得更好,但我认为这是一个非常好的开始.我会把所有这些混乱放入一个函数来保存输入.