Passing an UIAxes handle to PlotFcn

Question

Mario Malic 2020-9-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/596827-passing-an-uiaxes-handle-to-plotfcn

编辑： Mario Malic 2020-9-29

Hi guys,

I am having hard time wrapping my mind around anonymous functions. I am running an optimisation problem, and I would like to make the 'optimplotfval' function to plot on supplied UIAxes handle.

I know that I can create my own plot function or copy the optimplotfval and rename it, but I am wondering how to pass UIAxes handle to any of those cases.

I would be grateful for ideas.

Thanks.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Mario Malic 2020-9-21

beep boop, any ideas?

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Adam Danz 2020-9-21

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/596827-passing-an-uiaxes-handle-to-plotfcn#answer_498163

编辑：Adam Danz 2020-9-21

在 MATLAB Online 中打开

tl;dr use the OutputFcn method below.

Using a custom optimplotfval

"I would like to make the 'optimplotfval' function to plot on supplied UIAxes handle"

When PlotFcns is set to optimplotfval, the optimizer searches for an existing figure named 'Optimization Plot Function' and if it doesn't exist, it creates one. The optimization outputs are plotted on that figure and there is no option to pass an alternative axis handle.

However, you can specify your own plotting function that does contain an axis handle input but the 'Optimization Plot Function' figure will be created anyway even though it will be ignored. Therefore, this approach is not the one you want but I'll show it anyway JFF (just for fun).

options = optimset('PlotFcns',@(a,b,c)customOptimplotfval(app.UIAxes,a,b,c),'TolX',1e-7)
%                      Notice the axis handle passed here ^^^^^^^^^^
 
function stop = customOptimplotfval(ax,~,optiVals,~)
% Assumes this has already been executed: hold(app.UIAxes, 'on')
plot(ax, optiVals.iteration, optiVals.fval, 'm*')
stop = false; 
end

Using OutputFcn to control plotting

To bypass the problems described above, use an OutputFcn to plot the results of each iteration of the optimization.

% Create demo uiaxes
app.UIAxes = uiaxes(); 
pause(3) % wait for axis to appear before the show's over.
% Important: apply "hold on" prior to running the optimization.
cla(app.UIAxes)
hold(app.UIAxes, 'on')
% Set up and perform optimization
options = optimset('OutputFcn',@(x,optiVals,state)outfun(app.UIAxes,x,optiVals,state),'TolX',1e-7);
%                     Notice the axis handle passed here ^^^^^^^^^^
fun = @(x)100*((x(2) - x(1)^2)^2) + (1 - x(1))^2; % Rosenbrock's function
x0 = [-1,2];
[x,fval] = fminsearch(fun,x0,options);
% Define OutputFcn
function stop = outfun(ax,~,optiVals,~)
% Assumes this has already been executed: hold(app.UIAxes, 'on')
plot(ax, optiVals.iteration, optiVals.fval, 'm*')
drawnow % optional; also try drawnow limitrate
stop = false; 
end