1 % 常使用的对象查看和设置函数 2 % 1.get、set函数 3 get(0) % 获得句柄值为0的对象的属性，即显示器对象属性 4 5 plot([0:10]); % 绘制一幅图 6 title(\'示例\'); % 增加text对象 7 8 % 获得figure的所有子对象 9 allchild(gcf) 10 11 % 查看子对象类型 12 get(ans(1)) % type属性可以看到子对象类型 13 14 % 获得静态文本“示例”的句柄并进行设置 15 h = findobj(allchild(gca), \'String\', \'示例\'); 16 set(h, \'FontSize\', 20, \'FontWeight\', \'bold\');
findobj：特殊属性的图形对象 （doc findobj）
语法：
1.findobj:
findobj返回根对象的句柄和所有子对象（findobj returns handles of the root object and all its descendants without assigning the result to a variable.）
2.h = findobj：
返回根对象的句柄和所有子对象
3.h = findobj(\'PropertyName\',PropertyValue,...)
返回所有属性名为‘PropertyName’，属性值为\'PropertyValue\'的图形对象的句柄。可以指定多个属性/值对。
4.h = findobj(\'PropertyName\',PropertyValue,\'-logicaloperator\', PropertyName\',PropertyValue,...)
-logicaloperator可以取值：
-and
-or
-xor
-not
等
5.h = findobj(\'-regexp\',\'PropertyName\',\'regexp\',...)
属性名可以使用正则表达式
6.h = findobj(\'-property\',\'PropertyName\')
如果存在‘PropertyName’这个属性名，就返回此图形句柄
7.h = findobj(objhandles,...)
限制搜索范围为objhandles和他们的子图中
8.h = findobj(objhandles,\'-depth\',d,...)
指定搜索深度，深度参数\'d\'控制遍历层数，d为inf表示遍历所有层，d为0等同d=\'flat\'
9.h = findobj(objhandles,\'flat\',\'PropertyName\',PropertyValue,...)
\'flat\'限制搜索范围只能是当前层，不能搜索子图。
如果句柄指向一个不存在的图形，findobj返回一个错误。
findobj正确匹配任何合法属性值，例如：
findobj(\'Color\',\'r\')
找到所有color值为红的对象。
为了寻找满足指定条件的额handle对象，我们可以使用handle.findobj。
例子：
在当前坐标下查找所有直线对象：
h = findobj(gca,\'Type\',\'line\') %gca为当前坐标的句柄
查找Label属性设为\'foo\'和String设为\'bar\'的所有对象:
h = findobj(\'Label\',\'foo\',\'-and\',\'String\',\'bar\');
查找String不为\'foo\'也不为\'bar\'的所有对象:
h = findobj(\'-not\',\'String\',\'foo\',\'-not\',\'String\',\'bar\');
h = findobj(\'String\',\'foo\',\'-and\',\'Tag\',\'button one\',...
\'-and\',\'-not\',{\'Color\',\'red\',\'-or\',\'Color\',\'blue\'})
Find all objects for which you have assigned a value to the Tag property (that is, the value is not the empty string \'\'):
h = findobj(\'-regexp\',\'Tag\',\'[^\'\']\')
Find all children of the current figure that have their BackgroundColor property set to a certain shade of gray ([.7 .7 .7]). This statement also searches the current figure for the matching property value pair.
h = findobj(gcf,\'-depth\',1,\'BackgroundColor\',[.7 .7 .7])
1 % 对象操作示例 2 % h= figure ; get(h); 3 %获取能够使用的句柄 4 hf = figure(\'Units\', \'Normalized\', ... 5 \'Position\', [0.2 0.3 0.5 0.5], ... 6 \'Menu\', \'none\'); 7 8 ha = axes(\'Parent\', hf, \'Units\', \'Normalized\', ... 9 \'Position\', [0.1 0.1 0.8 0.8]); 10 11 hl = line(\'Parent\', ha, \'XData\', [0:0.01:7], ... 12 \'YData\', sin([0:0.01:7]), \'Color\', \'r\', ... 13 \'LineWidth\', 3); 14 15 cstring = \'gbkmy\'; 16 17 for k = 1:5 18 pause(3); 19 set(hl, \'Color\', cstring(k)); 20 end
1 % 底层代码实现GUI 2 hf = figure(... 3 \'Units\', \'Normalized\', ... 4 \'Position\', [0.2 0.2 0.6 0.5], ... 5 \'Menu\', \'none\', ... 6 \'Color\', \'w\'); 7 8 ha = axes(\'Parent\', hf, ... 9 \'Units\', \'Normalized\', ... 10 \'Position\', [0.1 0.1 0.6 0.8], ... 11 \'Box\', \'off\', ... 12 \'NextPlot\', \'add\'); 13 14 hb1 = uicontrol(\'Parent\', hf, ... 15 \'Units\', \'Normalized\', ... 16 \'Position\', [0.75 0.2 0.15 0.1], ... 17 \'Style\', \'pushbutton\', ... 18 \'String\', \'sin\', ... 19 \'Callback\', \'plot(sin([0:0.01:6]))\'); 20 21 hb2 = uicontrol(\'Parent\', hf, ... 22 \'Units\', \'Normalized\', ... 23 \'Position\', [0.75 0.4 0.15 0.1], ... 24 \'Style\', \'pushbutton\', ... 25 \'String\', \'cos\', ... 26 \'Callback\', \'plot(cos([0:0.01:6]))\'); 27 28 hb3 = uicontrol(\'Parent\', hf, ... 29 \'Units\', \'Normalized\', ... 30 \'Position\', [0.75 0.6 0.15 0.1], ... 31 \'Style\', \'pushbutton\', ... 32 \'String\', \'clear\', ... 33 \'Callback\', \'try,delete(allchild(ha));end\');
1 % 常用对象的属性 2 % % 1.figure 3 % hf = figure; 4 % get(hf); 5 % 6 % % 改变颜色 7 % set(hf, \'Color\', \'w\'); 8 % set(hf, \'Menubar\', \'none\'); 9 % set(hf, \'NumberTitle\', \'off\', \'Name\', \'演示\'); 10 % set(hf, \'ReSize\', \'off\'); 11 % pause(3) 12 % set(hf, \'Visible\', \'off\'); 13 % pause(3) 14 % set(hf, \'Visible\', \'on\'); 15 % 16 % set(hf, \'WindowStyle\', \'modal\'); 17 % 18 % set(hf, \'WindowKeyPressFcn\', \'closereq\'); 19 % 20 % set(hf, \'WindowButtonDownFcn\', \'closereq\'); 21 % 22 % hb = uicontrol(\'Style\', \'pushbutton\', \'Callback\', \'closereq\'); 23 24 % 2.axes 25 ha = axes; 26 get(ha) 27 set(ha, \'NextPlot\', \'add\'); 28 plot([0:100]); 29 30 plot(sin(0:0.01:3));
1 % text 2 hf = axes; 3 ht = text(1, 1, \'示例\'); 4 5 get(ht) 6 7 text(\'String\', \'\int_0^x dF(x)\', \'Position\', [0.5 .5]); 8 9 text(\'interpreter\', \'latex\', \'String\', \'$$ \int_0^x dF(x) $$\', \'Position\', [0.2 .2]); 10 11 % 原始的语句写出来 12 plot(x); 13 % 在原始语句两遍加上单引号 14 \'plot(x);\' 15 % 当原始语句中含有引号，那么将原始的单引号都改为两个单引号，然后再最外层加上一对单引号 16 \'plot(x, y, \'\'r\'\');\'
1 % text 2 hf = axes; 3 ht = text(0.1, 1, \'示例\'); 4 5 get(ht) 6 7 text(\'String\', \'\int_0^x dF(x)\', \'Position\', [0.5 .5]); 8 9 text(\'interpreter\', \'latex\', \'String\', \'$$ \int_0^x dF(x) $$\', \'Position\', [0.2 .2]); 10 11 % 原始的语句写出来 12 plot(x); 13 % 在原始语句两遍加上单引号 14 \'plot(x);\' 15 % 当原始语句中含有引号，那么将原始的单引号都改为两个单引号，然后再最外层加上一对单引号 16 \'plot(x, y, \'\'r\'\');\'
1 % uigetfile 2 uigetfile 3 4 doc uigetfile 5 6 % 规定打开文件类型 7 uigetfile(\'*.m\'); 8 9 % 输出参数意义 10 [a, b, c] = uigetfile(\'*.m\'); 11 12 [a, b, c] = uigetfile(\'*.txt\'); 13 if c == 1 14 load(fullfile(b, a)); 15 end 16 17 uigetfile(\'*.m\', \'实例\', \'default.m\'); 18 19 % uiputfile 20 uiputfile 21 22 doc uiputfile 23 [a, b, c] = uiputfile(\'*.m\');
1 % 颜色设置对话框 2 uisetcolor 3 4 doc uisetcolor 5 6 c = uisetcolor; 7 8 c = uisetcolor([1 0 0]); 9 10 h = plot([0:10]); 11 c = uisetcolor(h); 12 13 figure; 14 b = uicontrol(\'Parent\', gcf, \'String\', \'颜色设置\', \'Style\', \'pushbutton\', \'Callback\', ... 15 \'c = uisetcolor; set(b, \'\'BackgroundColor\'\', c);\'); 16 17 % 字体设置对话框 18 uisetfont 19 20 doc uisetfont 21 22 S = uisetfont(b); 23 24 figure; 25 b = uicontrol(\'Parent\', gcf, \'String\', \'颜色设置\', \'Style\', \'pushbutton\', \'Callback\', ... 26 \'uisetfont(b);\', \'Position\', [0.2 .2 0.8 0.8], \'Units\', \'Normalized\');
1 % 进度条 2 % waitbar 3 h = waitbar(0, \'实例\'); 4 get(h) 5 6 % 获得进度条的子对象 7 get(get(h, \'Children\')) 8 9 ha = get(h, \'Children\'); 10 11 % 获得坐标轴子对象的子对象内容 12 get(ha, \'Children\') 13 14 get(ans(1)) 15 get(ans(2)) 16 17 hrand = waitbar(0.3, \'颜色\') 18 19 ha1 = get(hrand, \'Children\'); 20 hac = get(ha1, \'Children\'); 21 hapa = findall(hac, \'Type\', \'patch\'); 22 set(hapa, \'Facecolor\', \'k\') 23 24 doc waitbar 25 26 waitbar(0.5, hrand)
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