MEC = SDRfoc(65,25,13, u=FALSE, ALIM=c(-1,-1, +1, +1), PLOT=FALSE)
plot(c(-1,1), c(-1,1), type='n', axes=FALSE, ann=FALSE, asp=1)
nipXY( MEC, 0, 0 , fcol = 'red', nipcol='blue', size = c(.6,.6), cex=2 )
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