Plotting and Saving as File in MATLAB

 I need to plot and save to image file in MATLAB. Here is the code that I am calling inside a 'for' loop: 

 

figure
scatter(data_x_pos,data_y_pos,'r*')
hold on
scatter(data_x_neg,data_y_neg,'b')
t = linspace(-80,80);
y = -model.w(1)*t/model.w(2);
plot(t,y,'k');
% need to save this plot to image to a file here

Now, this is starter code that I am using for some work and I don't understand it completely (example - the command 'figure'). There have been suggestions to use saveas or print but I believe I need handles for them. Could someone help me out here?  

 NOTE:-


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Answers: 

figure() is a function which returns a handle to the figure: 

 

 f = figure()
scatter(data_x_pos,data_y_pos,'r*') 
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