Generate result from fprintf to plot/graphical result.

I used to calculate a PNSR from the script editor, and the result appear on Command Windows like these:

 MSE:  140.38 dB
 MSE:  175.88 dB
 MSE:  186.95 dB
 PSNR: 26.6578388 dB
 PSNR: 25.6786990 dB
 PSNR: 25.4135523 dB

when I write a command >> plot(MSE);, i got error like

 Error using plot
 Data may not have more than 2 dimensions

anybody can help my problem?

[Geoff Hayes]

What are the dimensions of MSE? In the command window type

 size(MSE)

What is the result?