where are my data?

I plot a figure by using a function from a package.

Now I'd like to know the x and y values once I plot the curve.

Where are they stored

Answer 1

[Star Strider]

Try this:

F = openfig('untitled.fig');
ax = gca;
lines = findobj(ax, 'Type','Line');
for k = 1:numel(lines)
    x{k,:} = lines(k).XData;
    y{k,:} = lines(k).YData;
end

The x- and y-data for each line are in their appropriate cell arrays.

[Paul Rogers]

that works great,

One last thing fi you could.

I need to plot but with a diffferent x

x  = -0.2:0.01:0.8;

Can you just write me a piece of code for that, please?

Something like this

for k = 1:numel(lines)
   y{k,:} = lines(k).YData;
   plot(FlowVector,y{k,:})
   hold on
end

the x is always the same

[Star Strider]

I am not certain what you intend withh ‘...plot but with a different x’

Two possibilities:

F = openfig('Puntitled.fig');
ax = gca;
lines = findobj(ax, 'Type','Line');
for k = 1:numel(lines)
    x{k,:} = lines(k).XData;
    y{k,:} = lines(k).YData;
end

newx = -0.2:0.01:0.8;
for k = 1:numel(lines)
    newy{k,:} = interp1(x{k}, y{k}, newx, 'linear','extrap');       % Interpolate-Extrapolate
end

or:

figure
plot(newx, cell2mat(newy))                                          % Plot Interpolated Values
grid

figure
plot(cell2mat(x).', cell2mat(y).')                                  % Plot Previous Data With New X-Axis Ticks
xt = get(gca, 'XTick');
set(gca, 'Xtick',xt, 'XTickLabel',newx)
grid

One of these should do what you want.

[Paul Rogers]

for k = 1:numel(lines)
   figure(4)
   plot(FlowVector,y{k,:})
   grid on
   hold on
end

here's is the solution.

Man, thank you a lot, you really helped me.

I couldn't figured out without your help.

[Star Strider]

As always, my pleasure!

That’s what I’m here for!