cftool remove original data from fitted result

Hi,

Does anyone know how to remove original data points from the cftool fitting result? (those black spots make the graph ugly.)

Thanks, X

Answer 1

[halleyhit]

1. fit->save to workspace, choose save fit to matlab object named fit1, for example. 2. In command window, plot(x,fit1(x)). Here assume x is the X data in cftool.

[helloqxn]

Hi Halleyhit,

What if I am using x y z data to fit a surface? I tried to do as you said, but I find in "fit1" there is no matrix which can be used to plot "surf" in command window.

X

[halleyhit]

if true
  x1=linspace(min(x),max(x),10);
  y1=linspace(min(y),max(y),10);
  surf(x1,y1,fit1(x1,y1))
end

You may try this code. Here x and y are X data and Y data in cftool. x1 and y1 are the range of surf and you can adjust them. surf or surface can be used to show the image.

Answer 2

[helloqxn]

I found a way I think it meets my requirement: cftool->file->generate code. Then modify the code a bit: in plot fit with data session, keep only "fitresult" in plot command.

if true
  % Plot fit with data.
figure( 'Name', 'untitled fit 1' );
h = plot( fitresult, [xData, yData], zData );
legend( h, 'untitled fit 1', 'v vs. x, y', 'Location', 'NorthEast' );
% Label axes
xlabel x
ylabel y
zlabel v
grid on
end

Change it to be:

if true
  % Plot fit with data.
figure( 'Name', 'untitled fit 1' );
h = plot(fitresult);
legend( h, 'untitled fit 1', 'v vs. x, y', 'Location', 'NorthEast' );
% Label axes
xlabel x
ylabel y
zlabel v
grid on
end