print multiple lines to textarea

                app.TextArea.Value=sprintf('Fourier Number of Terms:%d\n\nEquation:\ny=a0',n);
                for i=1:n
                    txt='+a%d cos(%dx)+b%d sin(%dx)';app.TextArea.Value=(sprintf(txt,i,i,i,i));
                end  
                app.TextArea.Value=sprintf('\nCoefficients:\na0=%.4f',a0);
                for i=1:n; app.TextArea.Value=sprintf('\na%d=%.4f \nb%d=%.4f',i,a(i),i,b(i)) ;
                end
                app.TextArea.Value=sprintf('\n\nJ=%.4f \n\nR^2=%.4f \n\nRMSE=%.4f',j1,rsq1,RMSE1);

if i run this code it only prints last sprintf output, how do i print all

like this one

Answer 1

[DGM]

You're replacing the contents of the textarea every time. If you want multiple lines, you'll need to concatenate them together.

EDIT:

Something like this. I can't run this on the site, but you can test it.

% placeholders
n = 1;
a0 = 1;
a = rand(1,n);
b = rand(1,n);
j1 = 1;
rsq1 = 1;
RMSE1 = 1;

% dummy figure
fig = uifigure;
app.TextArea = uitextarea(fig);
app.TextArea.Position(3:4) = [200 200];

alltext = sprintf('Fourier Number of Terms:%d\n\nEquation:\ny=a0',n);
for i=1:n
    txt = '+a%d cos(%dx)+b%d sin(%dx)';
    alltext = [alltext sprintf(txt,i,i,i,i)];
end
alltext = [alltext sprintf('\nCoefficients:\na0=%.4f',a0)];
for i=1:n
    alltext = [alltext sprintf('\na%d=%.4f \nb%d=%.4f',i,a(i),i,b(i))];
end
alltext = [alltext sprintf('\n\nJ=%.4f \n\nR^2=%.4f \n\nRMSE=%.4f',j1,rsq1,RMSE1)];

app.TextArea.Value = alltext; % write once

[Fransi Mittal]

Thank you, this works well

Answer 2

[Benjamin Thompson]

Can you combine the outputs of all your sprintf calls into a single string, and pass this to app.TextArea.Value? It is not clear what app.TextArea.Value from your code, but my guess is that every time you assign something new to app.TextArea.Value, the previous information is deleted.

>> S1 = sprintf("My first string has number %d\n", 3)

S1 =

"My first string has number 3

"

>> S2 = sprintf("My second string has name %s\n", "Billy")

S2 =

"My second string has name Billy

"

>> S3 = strcat(S1, S2)

S3 =

"My first string has number 3

My second string has name Billy

"

[Fransi Mittal]

thanks, I got it