How can share the handles variable between two skripts?

Question

Mai Le Thai 2019-2-5

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https://ww2.mathworks.cn/matlabcentral/answers/443302-how-can-share-the-handles-variable-between-two-skripts

编辑： Mai Le Thai 2019-2-5

采纳的回答： Luna

My question ist:

1) i have created a panel with text in a skript

str_velocity = "%.2f km/h";

vxvRef= 0;

handles.str_velocity = sprintf(str_velocity, vxvRef);

if ~isempty(vxvRef)

uicontrol(handles.vehicleData, 'Style','text','Position', [148 -12 87 100], 'String',handles.str_velocity,'FontSize',11);

end

2) In another skript i have:

vxvRef= 3;

% try to acces the handles.str_velocity and update the new vxvRef into handles.str_velocity to show this in the panel

set(handles.vehicleData,'String',vxRef)

it showed me an error. How can I share the handles variable between two skripts and is my approach right ? Thanks

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Mai Le Thai 2019-2-5

%%%In the first Skript:

handles.vehicleData = uipanel(...

'Title','Vehicle Data',...

'FontSize',12,...

'Units','pixels',...

'Position',[1337 10 290 130]);

label_vehicleData = {'Ego velocity: ', 'Ego acceleration: ', 'Ground classification: '};

uicontrol(handles.vehicleData, 'Style','Text','String', label_vehicleData(1), 'FontSize',11,... 'Position', [-48 -5 200 95])

uicontrol(handles.vehicleData, 'Style','Text','String', label_vehicleData(2), 'FontSize',11,... 'Position', [-29 -35 194 98])

uicontrol(handles.vehicleData, 'Style','Text','String', label_vehicleData(3), 'FontSize',11,... 'Position', [-18 -63 194 98])

% velocity

str_velocity = "%.2f km/h";

vxvRef= 0;

handles.str_velocity = sprintf(str_velocity, vxvRef);

if ~isempty(vxvRef)

uicontrol(handles.vehicleData, 'Style','text','Position', [148 -12 87 100],... 'String',handles.str_velocity,'FontSize',11);

end

%%%In the second Skript:

vxvRef = handles.data.dat(1).evi_General.vxvRef(cycle)/normVelocity;

vxvRef = round(3.6*vxvRef*10)/10;

str_velocity = "%.2f km/h";

a = sprintf(str_velocity, vxvRef);

set(handles.str_velocity ,'String', a);

Error:

Reference to non-existent field 'str_velocity'.

Adam 2019-2-5

编辑：Adam 2019-2-5

在 MATLAB Online 中打开

If you run multiple scripts in sequence from the same workspace and subsequent scripts after the first don't have the deadly

clear all

or its cohorts then you will have access in subsequent scripts to anything you created in previous ones.

I would not recommend this method of programming though. You should use functions to encapsulate code and input and output arguments as appropriate to allow data to pass into and out of the workspace of each function.

Mai Le Thai 2019-2-5

That is also a good methode. thanks Adam!

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Answer 1

Luna 2019-2-5

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/443302-how-can-share-the-handles-variable-between-two-skripts#answer_359608

编辑：Luna 2019-2-5

在 MATLAB Online 中打开

@madhan ravi +1

If they are scripts, they should be created as methods of a class which is abstracted from handle superclass.

classdef MyClass < handle
    properties
        prop1
        prop2
        prop3
    end
    methods 
        function obj = MyClass
            obj.prop1 = uicontrol (.. 'Style','text',..);
            obj.prop2 = uicontrol (..'Style','pushbutton','Callback',@obj.ButtonPushedCallback);
            obj.prop3 = 500 % some velocity or other values 
        end
    
        function textChange(obj,source,event)
            % obj is MyClass object
            % source is text object
            % event is the event indicates any action taken
            obj.prop1.String = 'NewString';
            % You can also change text element string with using source object
            % source.String = 'NewString';
        end
    
        function ButtonPushedCallback(obj,source,event)
            % obj is MyClass object
            % source is pushbutton object
            % event is the event indicates that button pressed
            obj.textChange; % calls the text change function above
        end
    end
end
% You can reach all properties in all methods defined in this class with obj.property notation. 

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Mai Le Thai 2019-2-5

编辑：Mai Le Thai 2019-2-5

Thanks Luna. I am going to try your methode

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How can share the handles variable between two skripts?

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