Piecewise function is not making a function

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Question:Piecewise function is not making a function

Posted: anishtain4 15 Product: Maple 13

March 27 2012

I have two list, x1 and d, I want to make a piecewise function out of them and plot it, but I may have some other stuffs like this so I decided to write this procedure in a proc, the proc makes the input of the piecewise right, but when I want to make a function out of this and pass it to plot this does not works properly, I tried something else; first assigned a seri to a variable and passed it to the piecewise to make a function out of it this does not works either, but when I write the seri directly into the piecewise it makes a function, what am I missing here? my worksheet is attached and the code is presented here

Vec2Pw.mw

(1)

(2)

vec2pw := proc (L1::list, L2::list) local xn, yn, i, pw, x; xn := nops(L1); yn := nops(L2); pw := [`$`(0, 2*xn+2)]; if xn <> yn then print("Vectors dimensions are not consistent"); return pw end if; pw := x < (3/2)*L1[1]-(1/2)*L1[2], 0.; for i to xn-1 do pw := pw, x < (1/2)*L1[i]+(1/2)*L1[i+1], L2[i] end do; pw := pw, x < (3/2)*L1[xn]-(1/2)*L1[xn-1], L2[xn], 0.; return evalf(pw) end proc: