error on predfind function spap2

I am trying to run simple script using spap2 as follows

X=(4*pi)8[0 1 rand(1,20)];
Y=sin(X);
cs=spap2(X,Y);

I am getting error as undefined function 'spap2' for input arguments of type 'double'

[Stephen23]

This time I formatted your code for you, but in future please use the {} Code button that you will find above the textbox.

[Jan]

This is not a valid line of code:

X=(4*pi)8[0 1 rand(1,20)];

Please post the correct code you are using.

Answer 1

[Jan]

Did you read the documentation of http://www.mathworks.com/help/curvefit/spap2.html ? Please run the examples given there to find out, how to call this function.

Do the examples run? Then the error message means, that the 1st input cannot be a double. If they do not run: Do you have a license for the curve fitting toolbox?