error using horz cat in app desiner

Question

Abdulrahman Mohamed 2022-3-25

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1680184-error-using-horz-cat-in-app-desiner

回答： Simon Chan 2022-3-25

I am trying to make calculation at different range of x based on user input for minimum and maximum also, i added specific calculation y for each x input then i want to put in table and plot in the graph in App desiner but i got error "error using horz cat in app desiner'

Herer is the code

Rs=app.RsSCFSTBEditField.Value;

T=app.TREditField.Value;

API=app.APIEditField.Value;

Pb=app.PbEditField.Value;

P=app.CurrentPressureEditField.Value;

min=app.minPEditField.Value;

max=app.MaxPEditField.Value;

dead=app.uodcpEditField.Value;

uob=app.uobcpEditField.Value;

x=min:100:max;

xn=transpose(x);

if xn==14.7

y=dead;

elseif xn==Pb

y=uob;

elseif xn>Pb

a=-3.9.*(10^-5).*(xn)-5;

m=2.6*(xn.^1.187).*(10.^a);

uob=app.uobcpEditField.Value;

y=uob.*(xn/Pb).^m;

else

y=uob;

end

m=[xn y];

app.UITable.Data=m;

plot(app.UIAxes,xn,y)

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Answer 1

Simon Chan 2022-3-25

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1680184-error-using-horz-cat-in-app-desiner#answer_926554

在 MATLAB Online 中打开

Variable x is from min:100:max and hence it should not be a single number.

However, varibale y in your code seems to be a single number and hence it gives an error when you use function horzcat.

Adding an index to both variable xn and y as shown below should fix the problem.

x=min:100:max;
xn=transpose(x);
for k = 1:length(x)
    if xn(k)==14.7
     y(k,1)=dead;
    elseif  xn(k)==Pb
     y(k,1)=uob;
    elseif xn(k)>Pb 
     a=-3.9.*(10^-5).*(xn(k))-5;
     m=2.6*(xn(k).^1.187).*(10.^a);
    uob=111;
     y(k,1)=uob.*(xn(k)/Pb).^m;
    else 
        y(k,1)=uob;
    end
end