(adsbygoogle = window.adsbygoogle || []).push({}); signals....help needed

hi,

can anyone tell me why a discrete time signal x(n-k) where k>0 is shifted right along the X-axis(the time domain) and x(n+k) is shifted left. should'nt it be the reverse? this is for the graphical notation. but for the notation x(n)={...,0,3,2,1,0,1,2,3,0,.....}

we go left for x(n-k) and go right for x(n+k) which is past samples and future samples respectively. the graphical and short hand notations are really contradictory to me. so plzzzz help me:uhh:

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# Signals help needed

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