Hi,
you can't assume fuzzy scratch variables as used in
def flex(text t) = % t is a list of pairs
hide(n_:=0; for z=t: z_[incr n_]:=z; endfor
dz_:=z_[n_]-z_1)
z_1 for k=2 upto n_-1: ...z_[k]{dz_} endfor ...z_[n_] enddef;
newinternal n_; pair z_[],dz_;
to be official .. in mpxl we use names like
temp_pair_z
i.e. a temp_ namespace (as well as a mfun_ one) for all these
potentially clashing short names
you could do
newinternal n_; pair z_[],dz_;
at the top of your file (because we don't use them) but stil ...
Hans
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