I'm trying to make logic gates in the GUI ( app designer) but when i put the logical expression i get the error saying Value must be double scalar, How do i fix this ? Please help.

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Abdul wadood Mohammed 2018-5-26

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https://ww2.mathworks.cn/matlabcentral/answers/402700-i-m-trying-to-make-logic-gates-in-the-gui-app-designer-but-when-i-put-the-logical-expression-i-g

编辑： Ameer Hamza 2018-5-26

 a = app.val1.Value;             
 b = app.val2.Value;                            
 app.result.Value = a & b;

Error using matlab.ui.control.internal.model.AbstractNumericComponent/set.Value (line 110) 'Value' must be a double scalar.

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Answer 1

Ameer Hamza 2018-5-26

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编辑：Ameer Hamza 2018-5-26

It appears that the val1 and val2 are text type edit field, therefore a and b will have char class. Whereas result is a numeric edit field. If a and b have multiple characters then a&b will be an array and thus cannot be assigned to a scalar numeric field. You will need to take care of the type of edit field, you are trying to assign the value.