Table of values from output

Hi, I would like help to add a table of output values of x and y values for this code

x0 = [3; -1.5];  
maxIter = 50; 
tolX = 1e-14; 

x = x0;
xold = x0;

for i = 1:maxIter
    [f,j] = newtraph(x);
    x = x- j\f;
    
    err(:,i) = abs(x-xold);
    xold = x;
    if (err(:,i)<tolX)
        break;
    end
end

display(x)
fprintf('Number of iterations: %d \n',i)

function  [fval,jac] = newtraph(X)
x = X(1);
y = X(2);

fval(1,1)=x+exp(-x)+y^3;
fval(2,1)=x^2+2*x*y-y^2+tan(x);

jac = [1-exp(-x), 3*y^2;
        2*x+2*y+1+(tan(x))^2, 2*x-2*y];
end

Answer 1

[Star Strider]

Perhaps something like this:

xv = nan(MaxIter,1);
yv = xv;
for i = 1:maxIter
    [f,j] = newtraph(x);
    x = x- j\f;
    
    err(:,i) = abs(x-xold);
    xold = x;
    if (err(:,i)<tolX)
        break;
    end
    xv(i) = x(1);
    yv(i) = x(2);
end

OutputValues = table(xv(~isnan(xv)), yv(~isnan(yv)), 'VariableNames',{'X','Y'})

.

[Umar Naseef]

Thank you. However, I am getting repeated values of x and y. Is that an issue with my original code or because of the one that you sent?

[Star Strider]

They are actually not repeats.

Using format long before the loop, the result is:

OutputValues =

  5×2 table

           X                    Y        
    ________________    _________________

    3.71146633181626    -1.55197504848601
    3.59769376871789    -1.53630746228676
    3.59241988861306     -1.5354453832451
    3.59240993069037    -1.53544358383206
    3.59240993065508    -1.53544358382529

They only appear to be repeats with format short. They are actually unique entries.

Also, in the loop, change ‘xv’ and ‘yv’ so they automatically become column vectors:

    xv(i,:) = x(1);
    yv(i,:) = x(2);

This works better with the table call.

[Umar Naseef]

It works and I cannot thank you enough for this!!!

[Star Strider]

As always, my pleasure!

‘I cannot thank you enough for this!!!’

By Accepting my Answer, you already did! Thank you!