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plotcursor.m
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plotcursor.m
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function plotcursor(varargin)
%place two cursor on axes to measure value of the plot
% problem to be solved:
% 1. 运行该函数之后,如果修改 axes 的 XLim,会导致 cursor 不工作,需要解决。
% 2. 对于需要一次性对多个 axes 添加 cursor 的情况,暂时没考虑。(已解决)
% 3. 可以针对 axes property 中的 UIcontextmenu 加点东西,来实现更多功能。
% 4. 对于不连续函数,需要进行一些修正。本不应该显示坐标值。
% 5. 初始默认在 cursor 在想要的位置,需要增加传参的个数。
%
% PLOTCURSOR(y)
% PLOTCURSOR(x,y)
% PLOTCURSOR(x1,y1,x2,y2,...)
% PLOTCURSOR(xycell) include all the {x1,y1,x2,y2,...} in the cell.
% PLOTCURSOR(hAxes,x,y)
% PLOTCURSOR(hAxes,x1,y1,x2,y2,...)
% PLOTCURSOR(hAxes,xycell) include all the {hAxes,x1,y1,x2,y2,...} in the cell.
% PLOTCURSOR(hFig,hAxes,x,y)
% PLOTCURSOR(hFig,hAxes,x1,y1,x2,y2,...)
% PLOTCURSOR(hFig,hAxes,xycell) include all the {hFig,hAxes,x1,y1,x2,y2,...} in the cell.
%
% PROPERTY VALUE {Default} DESCRIPTION
% hFig: handle of parent figure of axes to be modified
% hAxes: handle of axes to be modified
% x: vector data of x axis in the plot
% y: vector data of y axis in the plot
% -----------------------------------------------------------
% Direction:
% plotcursor(fig2, axes_el_rect, theta_pol, pat_rect(:, idx));
%
%
% Sacco Huo, BIT, Beijing, CHINA.
% shuaike945@gmail.com
% Mastering MATLAB R2016a
% 2016-10-23
%--------------------------------------------------------------------------
% Parse Inputs Parse Inputs
%--------------------------------------------------------------------------
% disp(nargin);
% return;
nargi = nargin;
% x={};
if nargi>=2 && isvector(varargin{1}) && ishandle(varargin{1})
if isvector(varargin{2}) && ishandle(varargin{2})
hFig = varargin{1};
hAxes = varargin{2};
else
hFig = get(0,'CurrentFigure');
hAxes = varargin{1};
end
else
hFig = get(0,'CurrentFigure');
hAxes = get(hFig,'CurrentAxes');
end
%--------------------------------------------------------------------------
% Consider input arguments Consider input arguments
%--------------------------------------------------------------------------
if nargi==1 % PLOTCURSOR(y) PLOTCURSOR(xycell)
if isvector(varargin{1})
y{1} = varargin{1};
x{1} = 1:length(y);
elseif iscell(varargin{1})
if(rem(length(varargin{1}),2) == 0)
for idx=1:length(varargin{1})/2
x{idx} = varargin{1}{2*idx-1};
y{idx} = varargin{1}{2*idx};
end
else
error('xycell 中的参数个数应该是偶数');
return;
end
else
error('参数类型错误');
return;
end
end
if nargi==2 % PLOTCURSOR(x,y) PLOTCURSOR(hAxes,xycell)
if isvector(varargin{1}) && ishandle(varargin{1}) && ...
iscell(varargin{2}) % PLOTCURSOR(x,y)
if(rem(length(varargin{2}),2) == 0)
for idx=1:length(varargin{2})/2
x{idx} = varargin{2}{2*idx-1};
y{idx} = varargin{2}{2*idx};
end
else
error('xycell 中的参数个数应该是偶数');
return;
end
elseif isvector(varargin{1}) && isvector(varargin{2}) % PLOTCURSOR(hAxes,xycell)
x{1} = varargin{1};
y{1} = varargin{2};
else
error('参数类型错误');
return;
end
end
if nargi==3 % PLOTCURSOR(hAxes,x,y) PLOTCURSOR(hFig,hAxes,xycell)
if isvector(varargin{1}) && ishandle(varargin{1}) && ...
isvector(varargin{2}) && ishandle(varargin{2}) && ...
iscell(varargin{3}) % PLOTCURSOR(hFig,hAxes,xycell)
if(rem(length(varargin{3}),2) == 0)
for idx=1:length(varargin{3})/2
x{idx} = varargin{3}{2*idx-1};
y{idx} = varargin{3}{2*idx};
end
else
error('xycell 中的参数个数应该是偶数');
return;
end
elseif isvector(varargin{1}) && ishandle(varargin{1}) && ...
isvector(varargin{2}) && isvector(varargin{3}) % PLOTCURSOR(hAxes,x,y)
x{1} = varargin{2};
y{1} = varargin{3};
else
error('参数类型错误');
return;
end
end
if nargi>=4 && rem(nargi,2)==0 % PLOTCURSOR(hFig,hAxes,x,y) PLOTCURSOR(x1,y1,x2,y2,...) PLOTCURSOR(hFig,hAxes,x1,y1,x2,y2,...)
if isvector(varargin{1}) && ishandle(varargin{1}) && ...
isvector(varargin{2}) && ishandle(varargin{2})
if nargi==4
if isvector(varargin{3}) && isvector(varargin{4}) % PLOTCURSOR(hFig,hAxes,x,y)
x{1} = varargin{3};
y{1} = varargin{4};
else
error('参数类型错误');
return;
end
else % PLOTCURSOR(hFig,hAxes,x1,y1,x2,y2,...)
for idx=2:nargi/2
if isvector(varargin{2*idx-1}) && ...
isvector(varargin{2*idx})
x{idx-1} = varargin{2*idx-1};
y{idx-1} = varargin{2*idx};
else
error('参数类型错误');
return;
end
end
end
else % PLOTCURSOR(x1,y1,x2,y2,...)
for idx=1:nargi/2
if isvector(varargin{2*idx-1}) && ...
isvector(varargin{2*idx})
x{idx} = varargin{2*idx-1};
y{idx} = varargin{2*idx};
else
error('参数类型错误');
return;
end
end
end
end
if nargi>=5 && rem(nargi,2)==1 % PLOTCURSOR(hAxes,x1,y1,x2,y2,...)
if isvector(varargin{1}) && ishandle(varargin{1})
for idx=1:(nargi-1)/2
if isvector(varargin{2*idx}) && ...
isvector(varargin{2*idx+1})
x{idx} = varargin{2*idx};
y{idx} = varargin{2*idx+1};
else
error('参数类型错误');
return;
end
end
else
error('参数类型错误');
return;
end
end
%--------------------------------------------------------------------------
% Cursors Process Cursors Process
%--------------------------------------------------------------------------
rt = groot;
rt.CurrentFigure = hFig;
rt.CurrentFigure.CurrentAxes = hAxes;
% x = linspace(0,1,100);
% y = sin(2*pi*x);
% plot(x,y,'-k','LineWidth',1);
pp = {};
numCurves = length(x);
for idx=1:numCurves
pp{idx} = interp1(x{idx},y{idx},'linear','pp');
% f=@(x)ppval(pp{idx},x); % 通过一维线性插值得到交点纵坐标
f=@(x,tt)ppval(tt,x); % 通过一维线性插值得到交点纵坐标
fs{idx} = func2str(f);
htext{idx}=text(zeros(1,2),zeros(1,2),''); % 显示交点的2个文本标签
set(htext{idx}(1),'Color','red');
set(htext{idx}(2),'Color','blue');
set(htext{idx}(1),'HorizontalAlignment','right')
end
hline=line([1;1]*get(hAxes,'XLim'),get(hAxes,'YLim')'*[1,1],...
'LineWidth',2,'ButtonDownFcn',@drag); % 2条可移动的竖线
set(hline(1),'Color','red');
set(hline(2),'Color','blue');
% set([hline(1),htext(1)],'Color','red')
% set([hline(2),htext(2)],'Color','blue')
% set(htext(1),'HorizontalAlignment','right')
function drag(this,~)
xlm=get(gca,'XLimMode'); % 保留 x 轴调整模式
set(gca,'XLimMode','manual') % 解决竖线超出x轴问题
wbmuf=get(gcbf,{'WindowButtonMotionFcn',...
'WindowButtonUpFcn'}); % 保留鼠标移动放开回调
set(gcbf,'WindowButtonMotionFcn',@move,...
'WindowButtonUpFcn',@drop); % 设置回调
function move(~,~)
cp = get(gca,'CurrentPoint'); % 鼠标当前点
% 交点坐标 (cx,cy)
cx=cp(1);
% cy=[];
cxlim = get(gca,'XLim');
cxmin = cxlim(1);
cxmax = cxlim(2);
for idx=1:numCurves
f = str2func(fs{idx});
cy(idx) = f(cx,pp{idx});
cymin(idx) = f(cxmin,pp{idx});
cymax(idx) = f(cxmax,pp{idx});
end
% cy=f(cx);
if cx >= cxmin && cx <= cxmax
set(this,'XData',[cx,cx]) % 改变竖线水平位置
% 实时显示当前点
for idx=1:numCurves
set(htext{idx}(this==hline),'Position',[cx,cy(idx)], ...
'String',sprintf(' %.2f, %.2f ',cx, ...
cy(idx)));
end
elseif cx <= cxmin
set(this,'XData',[cxmin,cxmin]) % 改变竖线水平位置
for idx=1:numCurves
set(htext{idx}(this==hline),'Position',[cxmin,cymin(idx)], ...
'String',sprintf(' %.2f, %.2f ',cxmin, cymin(idx)));
end
else
set(this,'XData',[cxmax,cxmax]) % 改变竖线水平位置
for idx=1:numCurves
set(htext{idx}(this==hline),'Position',[cxmax,cymax(idx)], ...
'String',sprintf(' %.2f, %.2f ',cxmax, cymax(idx)));
end
end
end
function drop(~,~)
set(gcbf,'WindowButtonMotionFcn',wbmuf{1},...
'WindowButtonUpFcn',wbmuf{2}); % 恢复回调设置
set(gca,'XLimMode',xlm) % 恢复x轴调整模式
end
end
end