Suppressing certain output

[RONALD FRANCIS]

How do I turn off the listing of N before the graph output,  In Scilab  
there is a command "lines(0)" which will suppress this.  This is the  
script in question.
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function [S] = walk(N);
clf;
t = (0:1:N);
S = [0; cumsum(2*(rand(N,1)>0.5)-1)];
M = max(abs(S))+1;
plot(t,S);
axis([0 N -M M]);
endfunction
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It works as expected but it also puts out a long listing of N in  
response to walk(N).

Thank You