Error using matlab.ui.​control.in​ternal.mod​el.Abstrac​tNumericCo​mponent/se​t.Value (line 111) 'Value' must be a double scalar.

I am creating an application in Matlab where I want to display in Edit FIeld (Numeric) the solution of the below equation. The equation has two solutions and I want to keep the lowest of the two. When I try, the following error pops up "

Error using matlab.ui.control.internal.model.AbstractNumericComponent/set.Value (line 111)

'Value' must be a double scalar."

x1=107.8485;
y2=-107.8485;
w=2100;
xRadius=2754.2;
yRadius=2754.2;

syms x6 
eqn = (x6-x1)^2/xRadius^2 + (-w-y2)^2/(yRadius^2)-1;
S = vpasolve (eqn,x6);
x3 = round(min(S));

app.EditField.Value = x3 ;

[Walter Roberson]

y2 not defined

[Gerasimos Drakatos]

Sorry, y2 (instead of x2). just shanged it.

Answer 1

[Walter Roberson]

app.EditField.Value = double(x3) ;

Answer 2

[Ibrahima Ba]

Bonjour j'ai créer une application, mais j'ai un probléme qui dit :

Error using matlab.ui.control.internal.model.AbstractNumericComponent/set.Value (line 111)

'Value' must be a double scalar.

Pouvez vous m'aider ?

% Value changed function: Knob2
        function Knob2ValueChanged(app, event)
            value = app.Knob2.Value;
            app.EditField.Value = value;
            
            if strcmp(value,'Off')
                app.EditField_2.Value = 'Off';
            elseif strcmp(value,'Low')
                app.EditField_2.Value = 'Low';
            elseif strcmp(value,'Medium')
                app.EditField_2.Value = 'Medium';
            else
                app.EditField_2.Value = 'High';
            end

[Walter Roberson]

app.EditField_2 has been configured as a Numeric edit field, but you are trying to store a character vector in it. You need to change app.EditField_2 to be a text edit field.

Should it be an edit field at all? Do you want the user to be able to edit it to say (for example) 'Hello' ? When you have a limited number of permitted values and you want the user to be able to choose one of those, usually it is better to use a listbox or dropbox.

[Ibrahima Ba]

Je vous remercie cela me sembler évident en plus .

çà marche parfaitement.