function error in matlab app desinger

I tried to use app function as helper function in app desinger

but i got error that Illegal use of reserved keyword "methods".

this is the function

methods (Access = private)

function result=belladead(app,Rs,T,API);

a=10^(0.43+(8.33/API));

x1=(1.8*10^7)/(API^4.53);

x2=(360/(T-260))^a;

uod=(0.32+x1)*(x2);

result=uod;

end

end

this is the call back function

value = app.SelectCorrelationDropDown.Value;

Rs=app.RsSCFSTBEditField.Value;

T=app.TREditField.Value;

API=app.APIEditField.Value;

switch app.SelectCorrelationDropDown.Value

case 'Beal’s Correlation'

g=belladead(app,Rs,T,API);

app.uodcpEditField.Value=g;

case 'Glaso’s Correlation'

a=10.313*(log10(T-460))-36.447

uod1=(3.141*(10^10))*((T-460)^-3.444)*(log10(API))^a;

app.uodcpEditField.Value=uod1;

otherwise

disp("please select correlation")

end

Answer 1

[Rishav]

Hi Abdulrahman,

I understand that you are getting the error 'Illegal use of reserved keyword "methods"' while writing a helper function.

There are two possible reasons for this error:

1. You are not defining this method inside a class.
2. You are defining this method inside of another method of the same class.

Thank you,

Rishav Saha