Is regression and curve fitting option best for plotting graphs on MAT

Hi <br />I am a newbie at MATLAB.<br /><br />My Q is regarding plotting of curves and graphs using MATLAB <br /><br />Shud I use regression and curve fitting function which uses microsoft excel to plot graphs in which i want to show 3 entities? <br /><br />I have 3 images and i want to plot the rate distortion bppVs PSNR curve for them. I have the data set for both x and y axis .......<br /><br />please let me knwo the best tool I shud use to plot it <br /><br /><br /><br />Thanks,<br /><br />Tavisha
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