Could I have the missing points

Hello again.My data points creates a continuous line in the figure.I want to ask, if there is a way to specify the value of x-axis for y-axis=1/e even if i dont have point with these values. I have tried it, but the answer was 'empty matrix 1-0' (sth like this)

Answer 1

[Mischa Kim]

Pantelis, use curve fitting. As an example,

 x  = 0:0.1:1;
 y  = sin(x);                                 % your data

 p  = polyfit(x(3:4),y(x>=x(3) & x<=x(4)),1); % fitting coefficients
 yf = p(2) + p(1)*x(3:4);                     % curve fit

 plot(x,y,x(3:4),yf,'r*')

Of course, you want to make sure that the fitting is done over a "small" region (just as an example, between 3rd and 4th data points, as shown above) to get a "good" approximation of the in-between vals.

[Pantelis Saviolakis]

i tried it but i take the same answer.Obviously i do sth wrong. I will try it later. Thanks.