help with plotting smooth curve

i need help connecting the dots with a smooth curve for this code ive written

data=zeros(1,20)

global Z_hit

for theta1=1:2:20 Z_hit=3*((0.5*(theta1^2))-((exp(-1*theta1)+theta1-1)))-2*((0.25*(theta1^2))-2*(exp(-1*theta1/2)+theta1-1))

    data(theta1)=Z_hit

    plot(theta1,data(theta1),'Marker','o')

    hold on

end

Answer 1

[Mischa Kim]

Arnav, use

 global Z_hit
 theta1 = 1:2:20;
 data   = zeros(1,numel(theta1));
 for ii=1:numel(theta1)
    Z_hit    = 3*((0.5*(theta1(ii)^2))-((exp(-1*theta1(ii))+theta1(ii)-1)))-...
        2*((0.25*(theta1(ii)^2))-2*(exp(-1*theta1(ii)/2)+theta1(ii)-1));
    data(ii) = Z_hit;
 end
 plot(theta1,data,'o-')

Do you need Z_hit? If not, you could directly assign the value computed in the loop to data(ii).

[Arnav]

thank you mischa,you're awesome.

Answer 2

[Image Analyst]

Perhaps putting the data into spline will help. See attached demo below in blue text.

Also, read this: http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup