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首页 > 软件编程 > C 语言 > Matlab箭头坐标轴

Matlab实现生成箭头坐标轴详解

作者：slandarer

这篇文章主要介绍了如何利用Matlab实现生成箭头坐标轴，为坐标轴增添箭头，文中的示例代码讲解详细，对我们学习Matlab有一定帮助，需要的可以参考一下

属实是写工具函数写上瘾了，又写了一个一行代码将坐标轴变为箭头坐标轴的函数，而且可以对其进行随意拖动和缩放(拖动需要先点击那个像手掌的符号)：

功能函数的引用非常简单，就只是在最后面加上一行：

arrowAxes()或者arrowAxes(ax)

即可，以下给出几个例子：

demo1 基础使用

就像上面说的一样，编写好代码后在最后面引用一下工具函数即可：

% arrow axes demo1
% @author:slandarer

t=-pi:.2:2*pi;
stem(t,sin(t),'LineWidth',1.5);

arrowAxes()

demo2 轴方向

可以调整坐标区域的XAxisLocation属性及YAxisLocation属性来调整坐标轴的方向和位置，总共有九种组合，篇幅问题这里不一一列举

这里只列举常用的四种：

% arrow axes demo2
% @author:slandarer

t=-pi:.2:2*pi;


% 子图1
ax1=subplot(2,2,1);
plot(t,sin(t),'LineWidth',1.5);
arrowAxes(ax1)

% 子图2
ax2=subplot(2,2,2);
plot(t,sin(t),'LineWidth',1.5);
ax2.XAxisLocation='top';
ax2.YAxisLocation='right';
arrowAxes(ax2)

% 子图3
ax3=subplot(2,2,3);
plot(t,sin(t),'LineWidth',1.5);
ax3.XAxisLocation='origin';
arrowAxes(ax3)

% 子图4
ax4=subplot(2,2,4);
plot(t,sin(t),'LineWidth',1.5);
ax4.XAxisLocation='origin';
ax4.YAxisLocation='origin';
arrowAxes(ax4)

demo3 轴的其他属性

在引用工具函数前调整坐标轴的粗细和颜色，引用工具函数时，工具函数会自动提取坐标轴的属性并赋予箭头坐标轴：

% arrow axes demo3
% @author:slandarer

t=-pi:.2:2*pi;
stem(t,sin(t),'LineWidth',1.5);

% 修改坐标轴属性
ax=gca;
ax.XColor=[1,0,0];
ax.LineWidth=2;
ax.XAxisLocation='origin';

arrowAxes(ax)

后言

不管画多少子图，怎样的轴方向和位置，每个子图都能像如下这样任意调整坐标范围和图像缩放。

工具函数完整代码

function arrowAxes(ax)
%
% @author: slandarer
% @公众号: slandarer随笔
% @知乎  : hikari
% @CSDN  : slandarer
% 
% 期待您的关注!!!

help arrowAxes % 若不希望输出[作者信息],请删除这行


if nargin<1
    ax=gca;
end

ax.Box='off';
ax.UserData.arrow{1}=[];
ax.UserData.arrow{2}=[];
ax.UserData.arrow{3}=[];
ax.UserData.arrow{4}=[];

pos=ax.Position;
xm=.02;
ym=.02;
% -------------------------------------------------------------------------
switch ax.XAxisLocation
    case 'bottom'
        ax.UserData.arrow{2}=annotation('arrow');
        ax.UserData.arrow{2}.Color=ax.YColor;
        ax.UserData.arrow{2}.Position=[pos(1),pos(2),0,pos(4)+ym];
    case 'top'
        ax.UserData.arrow{4}=annotation('arrow');
        ax.UserData.arrow{4}.Color=ax.YColor;
        ax.UserData.arrow{4}.Position=[pos(1),pos(2)+pos(4),0,-pos(4)-ym];
    case 'origin'
        ax.UserData.arrow{2}=annotation('arrow');
        ax.UserData.arrow{2}.Color=ax.YColor;
        ax.UserData.arrow{2}.Position=[pos(1),pos(2),0,pos(4)+ym];
        ax.UserData.arrow{4}=annotation('arrow');
        ax.UserData.arrow{4}.Color=ax.YColor;
        ax.UserData.arrow{4}.Position=[pos(1),pos(2)+pos(4),0,-pos(4)-ym];
end
switch ax.YAxisLocation
    case 'left'
        ax.UserData.arrow{1}=annotation('arrow');
        ax.UserData.arrow{1}.Color=ax.XColor;
        ax.UserData.arrow{1}.Position=[pos(1),pos(2),pos(3)+xm,0];
    case 'right'
        ax.UserData.arrow{3}=annotation('arrow');
        ax.UserData.arrow{3}.Color=ax.XColor;
        ax.UserData.arrow{3}.Position=[pos(1)+pos(3),pos(2),-pos(3)-xm,0];
    case 'origin'
        ax.UserData.arrow{1}=annotation('arrow');
        ax.UserData.arrow{1}.Color=ax.XColor;
        ax.UserData.arrow{1}.Position=[pos(1),pos(2),pos(3)+xm,0];
        ax.UserData.arrow{3}=annotation('arrow');
        ax.UserData.arrow{3}.Color=ax.XColor;
        ax.UserData.arrow{3}.Position=[pos(1)+pos(3),pos(2),-pos(3)-xm,0];
end

if strcmp(ax.XAxisLocation,'top')
    if ~isempty(ax.UserData.arrow{1}),ax.UserData.arrow{1}.Position=[pos(1),pos(2)+pos(4),pos(3)+xm,0];end
    if ~isempty(ax.UserData.arrow{3}),ax.UserData.arrow{3}.Position=[pos(1)+pos(3),pos(2)+pos(4),-pos(3)-xm,0];end
end
if strcmp(ax.YAxisLocation,'right')
    if ~isempty(ax.UserData.arrow{2}),ax.UserData.arrow{2}.Position=[pos(1)+pos(3),pos(2),0,pos(4)+ym];end
    if ~isempty(ax.UserData.arrow{4}),ax.UserData.arrow{4}.Position=[pos(1)+pos(3),pos(2)+pos(4),0,-pos(4)-ym];end
end
for i=1:4
    if ~isempty(ax.UserData.arrow{i}),ax.UserData.arrow{i}.LineWidth=ax.LineWidth;end
end


reArrow()
% -------------------------------------------------------------------------
function reArrow(~,~)
if strcmp(ax.XAxisLocation,'origin')
    pos=ax.Position;
    ylim=ax.YLim;
    sepy=(0-ylim(1))./(ylim(2)-ylim(1)).*pos(4);
    switch true
        case ylim(2)<=0
            if ~isempty(ax.UserData.arrow{1}),ax.UserData.arrow{1}.Position=[pos(1),pos(2)+pos(4),pos(3)+xm,0];end
            if ~isempty(ax.UserData.arrow{3}),ax.UserData.arrow{3}.Position=[pos(1)+pos(3),pos(2)+pos(4),-pos(3)-xm,0];end
        case ylim(1)>=0
            if ~isempty(ax.UserData.arrow{1}),ax.UserData.arrow{1}.Position=[pos(1),pos(2),pos(3)+xm,0];end
            if ~isempty(ax.UserData.arrow{3}),ax.UserData.arrow{3}.Position=[pos(1)+pos(3),pos(2),-pos(3)-xm,0];end
        case ylim(2)>0&ylim(1)<0
            if ~isempty(ax.UserData.arrow{1}),ax.UserData.arrow{1}.Position=[pos(1),pos(2)+sepy,pos(3)+xm,0];end
            if ~isempty(ax.UserData.arrow{3}),ax.UserData.arrow{3}.Position=[pos(1)+pos(3),pos(2)+sepy,-pos(3)-xm,0];end
    end
end
if strcmp(ax.YAxisLocation,'origin')
    pos=ax.Position;
    xlim=ax.XLim;
    sepx=(0-xlim(1))./(xlim(2)-xlim(1)).*pos(3);
    switch true
        case xlim(2)<=0
            if ~isempty(ax.UserData.arrow{2}),ax.UserData.arrow{2}.Position=[pos(1)+pos(3),pos(2),0,pos(4)+ym];end
            if ~isempty(ax.UserData.arrow{4}),ax.UserData.arrow{4}.Position=[pos(1)+pos(3),pos(2)+pos(4),0,-pos(4)-ym];end
        case xlim(1)>=0
            if ~isempty(ax.UserData.arrow{2}),ax.UserData.arrow{2}.Position=[pos(1),pos(2),0,pos(4)+ym];end
            if ~isempty(ax.UserData.arrow{4}),ax.UserData.arrow{4}.Position=[pos(1),pos(2)+pos(4),0,-pos(4)-ym];end
        case xlim(2)>0&xlim(1)<0
            if ~isempty(ax.UserData.arrow{2}),ax.UserData.arrow{2}.Position=[pos(1)+sepx,pos(2),0,pos(4)+ym];end
            if ~isempty(ax.UserData.arrow{4}),ax.UserData.arrow{4}.Position=[pos(1)+sepx,pos(2)+pos(4),0,-pos(4)-ym];end
    end
end
end
set(ax.Parent,'WindowButtonMotionFcn',@reArrow);  % 设置鼠标按下回调
end

到此这篇关于Matlab实现生成箭头坐标轴详解的文章就介绍到这了,更多相关Matlab箭头坐标轴内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！

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