Free logical script

Creates - completely vectorized - a logical array/vector with epochs/intervals set to according to a list of indices of the form:
begin = [b1 b2 ... bN]
end = [e1 e2 ... eN]
where s and s may overlap or be included within each other.
lvec=[b1:e1 b2:e2 ... bN:eN]
itself can be used to retrieve/assign values from a numerical construct, eg,
vec(1,2,lvec)=nan;
help mep
vix = mep(v,ixb,ixe)
vix = mep(v,[ixb;ixe])
to create epochs
returns in VIX a array with epochs set to
true: ixb(1)->ixe(1) ... ixb(N)->ixe(N)
false: otherwise
correctly handles epoch overlaps/inclusions/reversals
v: vector (to size VIX, is not changed)
ixb: list of indices BEGIN epoch
ixe: list of indices END epoch
% examples
z=zeros(1,10);
vix=mep(z(1,:),[1 5],[3 10]);
z(1,vix)=1
% 1 1 1 0 1 1 1 1 1 1
z=zeros(1,10);
vix=mep(z(1,:),[2 3 2 6 9],[2 3 4 7 10]);
z(1,vix)=1
% 0 1 1 1 0 1 1 0 1 1
z=----------;
vix=mep(z,[[1 3 6];[4 4 8]]);
z(vix)=
% - --

Requirements: MATLAB Release: R13

PERMPOS is a convenient mathematical tool which contains all possible permutations of M values in N positions. B = PERMPOS(M,N) where M and N are non-negative integers produces a logical (N!/M!(N-M)!)-by-N matrix in which each row contains a unique permation of M trues and (N-M) falses. Note that each column will hence contain (N-1) trues.

B = PERMPOS(V,N) where V is a vector of length M produces a matrix where each row a contains the values of V in preserved order, but uniquely permuted at the N columns. The remaining positions are zero.

Examples:
permpos(2,4) % ->
% 1 1 0 0
% 1 0 1 0
% 1 0 0 1
% 0 1 1 0
% 0 1 0 1
% 0 0 1 1
permpos([-4 9 3],4) % >
% -4 9 3 0
% -4 9 0 3
% -4 0 9 3
% 0 -4 9 3
See also NCHOOSEK, PERMS, RANDPERM, TRUE, FALSE and COMBN, ALLCOMB, BALLATSQ, NONES (Matlab File Exchange)

Requirements:

• MATLAB Release: R13

Major Features :

1. Parse BibTex into a logical data javascript data structure.
2. Output parsed BibTex entries as HTML, RTF, or BibTex.