How do you do numerical integration of a function in App Designer?

Question

Cayleigh Johnston 2019-8-17

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/476502-how-do-you-do-numerical-integration-of-a-function-in-app-designer

回答： Jyotsna Talluri 2019-8-20

Is it possible to use the 'integral' function as in Matlab. I am struggling to write a function in terms of variable, say f(x), and then do integration on that function in AppDesigner.

My function is similar to x*0.25*(x/0.2)^0.1*exp(-(x/0.2)^0.1), and would like to integrate between two bounds that are user inputs within App Designer.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Adam Danz 2019-8-19

Something in your app needs to trigger the function. It could be a button or a ValueChangedFcn. Once the function is invoked, from within the function you can extract all of the needed values from your GUI by using the app variable. You can write your function anywhere in your app and call it from the callback function.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Jyotsna Talluri 2019-8-20

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/476502-how-do-you-do-numerical-integration-of-a-function-in-app-designer#answer_388325

在 MATLAB Online 中打开

Use the numeric edit boxes to input the limits of integration and to display the result of integration.Function for integration can be written in your app and can be invoked by calling it in pushbutton callback. You can extract the values from editboxes in pushbutton callback .

methods (Access = private) 
function results = func(app,n1,n2) 
syms x; 
f=@(x)x*0.25.*((x/0.2).^0.1).*exp(-(x/0.2).^0.1); 
app.result.Value=integral(f,n1,n2); 
end 
end 
 % val1,val2,result are editboxes
% Callbacks that handle component events 
methods (Access = private) 
% Button pushed function: Button (callback)
function ButtonPushed(app, event) 
n1=app.val1.Value; 
n2=app.val2.Value; % editbox values
func(app,n1,n2); 
end 
end 