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function [tree]=sci_sparse(tree)
// Copyright INRIA
// M2SCI function
// Conversion function for Matlab sparse()
// Input: tree = Matlab funcall tree
// Ouput: tree = Scilab equivalent for tree
// V.C.
// nzmax does not exist in Scilab
if rhs==6 then
rhs=5
set_infos("Call to sparse(): nzmax option ignored...",0)
end
// S = sparse(A)
if rhs==1 then
A = getrhs(tree)
// %c_sparse and %b_sparse are not defined
A = convert2double(A)
tree.rhs=Rhs(A)
tree.lhs(1).dims=A.dims
tree.lhs(1).type=Type(Sparse,A.property)
// S = sparse(m,n)
elseif rhs==2 then
[m,n] = getrhs(tree)
// %c_sparse and %b_sparse are not defined
m = convert2double(m)
n = convert2double(n)
tree.rhs=Rhs([],[],Operation("rc",list(m,n),list()))
dims=list(Unknown,Unknown)
if typeof(m)=="cste" then
dims(1)=m.value
end
if typeof(n)=="cste" then
dims(2)=n.value
end
tree.lhs(1).dims=dims
tree.lhs(1).type=Type(Sparse,Real)
// S = sparse(i,j,s)
elseif rhs==3 then
[i,j,s] = getrhs(tree)
// %c_sparse and %b_sparse are not defined
i = convert2double(i)
j = convert2double(j)
s = convert2double(s)
tree.rhs=Rhs(i,j,s)
// Matlab tolerates length(i)<>length(j)...
if size(i.dims)<>size(j.dims) | size(i.dims)<>size(s.dims) then
set_infos("For Scilab sparse(), input values must have the same size, not sure they have...",2)
end
if i.dims(2)==1 & j.dims(2)==1 then
tree.rhs=Rhs(Operation("rc",list(i,j),list()),s)
elseif typeof(i)=="variable" & typeof(j)=="variable" then
tree.rhs=Rhs(Operation("rc",list(Operation("ext",list(i,Cste(":")),list()),Operation("ext",list(j,Cste(":")),list())),list()),s)
else
if typeof(i)<>"variable" then
V1=gettempvar(1)
insert(Equal(list(V1),i))
else
V1=i
end
if typeof(j)<>"variable" then
V2=gettempvar(2)
insert(Equal(list(V2),j))
else
V2=j
end
tree.rhs=Rhs(Operation("rc",list(Operation("ext",list(V1,Cste(":")),list()),Operation("ext",list(V2,Cste(":")),list())),list()),s)
end
tree.lhs(1).dims=list(Unknown,Unknown)
tree.lhs(1).type=Type(Sparse,s.property)
elseif rhs==4 then
// Can not happen
//S = sparse(i,j,s,m,n)
elseif rhs==5 then
[i,j,s,m,n] = getrhs(tree)
i = convert2double(i)
j = convert2double(j)
s = convert2double(s)
m = convert2double(m)
n = convert2double(n)
tree.rhs=Rhs(i,j,s,m,n)
if i.dims(2)==1 & j.dims(2)=="1" then
tree.rhs=Rhs(Operation("rc",list(i,j),list()),s)
elseif typeof(i)=="variable" & typeof(j)=="variable" then
rhs1=Operation("rc",list(Operation("ext",list(i,Cste(":")),list()),Operation("ext",list(j,Cste(":")),list())),list())
rhs3=Operation("rc",list(m,n),list())
tree.rhs=Rhs(rhs1,s,rhs3)
else
if typeof(i)<>"variable" then
V1=gettempvar(1)
insert(Equal(list(V1),i))
else
V1=i
end
if typeof(j)<>"variable" then
V2=gettempvar(2)
insert(Equal(list(V2),j))
else
V2=j
end
rhs1=Operation("rc",list(Operation("ext",list(V1,Cste(":")),list()),Operation("ext",list(V2,Cste(":")),list())),list())
rhs3=Operation("rc",list(m,n),list())
tree.rhs=Rhs(rhs1,s,rhs3)
end
tree.lhs(1).dims=list(Unknown,Unknown)
tree.lhs(1).type=Type(Sparse,s.property)
end
endfunction
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