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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) 2004-2006 - INRIA - Farid BELAHCENE
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
function [tree]=sci_cov(tree)
// M2SCI function
// Conversion function for Matlab cov()
// Input: tree = Matlab funcall tree
// Ouput: tree = Scilab equivalent for tree
if rhs==1 then
A=getrhs(tree)
if A.dims(1) == 1 then
if A.dims(2) == 1 then
tree.name="mvvacov"
tree.lhs(1).dims=list(1,1)
elseif A.dims(2) > 1 then
tree.name="mvvacov"
tree.rhs(1) = Funcall("matrix",1,list(A,Cste(-1),Cste(1)),list())
n = A.dims(2)
n_minus = n-1
tree.lhs(1).dims=list(n,n)
op1 = Operation("/",list(Cste(n),Cste(n_minus)),list())
tree = Operation("*",list(op1,tree),tree.lhs)
elseif A.dims(2) == Unknown then
tree.name = "mtlb_cov"
end
elseif A.dims(1) > 1 then
tree.name = "mvvacov"
n = A.dims(1)
n_minus = n-1
tree.lhs(1).dims=list(n,n)
op1 = Operation("/",list(Cste(n),Cste(n_minus)),list())
tree = Operation("*",list(op1,tree),tree.lhs)
elseif A.dims(1) == Unknown & A.dims(2) == Unknown
tree.name = "mtlb_cov"
end
elseif rhs == 2 then
[A,B] = getrhs(tree)
if B.dims(1) == 1 & B.dims(2) == 1
if typeof(B) == "cste" & B.value == 1 then
if A.dims(1) == 1 then
if A.dims(2) == 1 then
tree.name = "mvvacov"
tree.rhs(2)=null()
tree.lhs(1).dims=list(1,1)
elseif A.dims(2) > 1 then
tree.name = "mvvacov"
tree.rhs(1) = Funcall("matrix",1,list(A,Cste(-1),Cste(1)),list())
tree.rhs(2)=null()
tree.lhs(1).dims=list(A.dims(2),A.dims(2))
elseif A.dims(2) == Unknown then
tree.name = "mtlb_cov"
end
elseif A.dims(1) > 1 then
tree.name = "mvvacov"
tree.rhs(2)=null()
tree.lhs(1).dims=list(A.dims(1),A.dims(1))
elseif A.dims(1) == Unknown & A.dims(2) == Unknown
tree.name = "mtlb_cov"
end
elseif typeof(B) == "cste" & B.value == 0 then
if A.dims(1) == 1 then
if A.dims(2) == 1 then
tree.name="mvvacov"
tree.rhs(2)=null()
tree.lhs(1).dims=list(1,1)
elseif A.dims(2) > 1 then
tree.name="mvvacov"
tree.rhs(2)=null()
tree.rhs(1) = Funcall("matrix",1,list(A,Cste(-1),Cste(1)),list())
n = A.dims(2)
n_minus = n-1
tree.lhs(1).dims=list(n,n)
op1 = Operation("/",list(Cste(n),Cste(n_minus)),list())
tree = Operation("*",list(op1,tree),tree.lhs)
elseif A.dims(2) == Unknown then
tree.name = "mtlb_cov"
end
elseif A.dims(1) > 1 then
tree.name = "mvvacov"
tree.rhs(2)=null()
n = A.dims(1)
n_minus = n-1
tree.lhs(1).dims=list(n,n)
op1 = Operation("/",list(Cste(n),Cste(n_minus)),list())
tree = Operation("*",list(op1,tree),tree.lhs)
elseif A.dims(1) == Unknown & A.dims(2) == Unknown
tree.name = "mtlb_cov"
end
else
tree.name = "mtlb_cov"
end
elseif B.dims(1)>1 | B.dims(2)>1 then
tree.name = "mvvacov"
n = B.dims(1)*B.dims(2)
n_minus = n-1
tree.lhs(1).dims=list(n,n)
rhs1 = Funcall("matrix",1,list(A,Cste(-1),Cste(1)),list())
rhs2 = Funcall("matrix",1,list(B,Cste(-1),Cste(1)),list())
tree.rhs(1) = Operation("rc",list(rhs1,rhs2),list())
tree.rhs(2) = null()
op1 = Operation("/",list(Cste(n),Cste(n_minus)),list())
tree = Operation("*",list(op1,tree),tree.lhs)
else
tree.name = "mtlb_cov"
end
elseif rhs==3
[A,B,C]=getrhs(tree)
if typeof(C) == "cste" & C.value == 1 then
if B.dims(1)>1 | B.dims(2)>1 | A.dims(1)>1 | A.dims(2)>1
tree.name = "mvvacov"
rhs1 = Funcall("matrix",1,list(A,Cste(-1),Cste(1)),list())
rhs2 = Funcall("matrix",1,list(B,Cste(-1),Cste(1)),list())
tree.rhs(1) = Operation("rc",list(rhs1,rhs2),list())
tree.rhs(3) = null()
tree.rhs(2) = null()
if A.dims(1)<> Unknown & A.dims(2)<>Unknown
tree.lhs(1).dims = list(A.dims(1)*A.dims(2),A.dims(1)*A.dims(2))
elseif B.dims(1)<>Unknown & B.dims(2)<>Unknown
tree.lhs(1).dims = list(B.dims(1)*B.dims(2),B.dims(1)*B.dims(2))
end
else
tree.name = "mtlb_cov"
end
elseif typeof(C) == "cste" & C.value == 0 then
if B.dims(1)>1 | B.dims(2)>1 | A.dims(1)>1 | A.dims(2)>1
if A.dims(1)<>Unknown & A.dims(2)<>Unknown
tree.name = "mvvacov"
n = A.dims(1)*A.dims(2)
n_minus = n-1
tree.lhs(1).dims = list(n,n)
rhs1 = Funcall("matrix",1,list(A,Cste(-1),Cste(1)),list())
rhs2 = Funcall("matrix",1,list(B,Cste(-1),Cste(1)),list())
tree.rhs(1) = Operation("rc",list(rhs1,rhs2),list())
tree.rhs(3)=null()
tree.rhs(2)=null()
op1 = Operation("/",list(Cste(n),Cste(n_minus)),list())
tree = Operation("*",list(op1,tree),tree.lhs)
elseif B.dims(1)<>Unknown & B.dims(2)<>Unknown
tree.name = "mvvacov"
n = B.dims(1)*B.dims(2)
n_minus = n-1
tree.lhs(1).dims = list(n,n)
rhs1 = Funcall("matrix",1,list(A,Cste(-1),Cste(1)),list())
rhs2 = Funcall("matrix",1,list(B,Cste(-1),Cste(1)),list())
tree.rhs(1) = Operation("rc",list(rhs1,rhs2),list())
tree.rhs(3)=null()
tree.rhs(2)=null()
op1 = Operation("/",list(Cste(n),Cste(n_minus)),list())
tree = Operation("*",list(op1,tree),tree.lhs)
else
tree.name = "mtlb_cov"
end
else
tree.name = "mtlb_cov"
end
else
tree.name = "mtlb_cov"
end
end
endfunction
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