1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
function [tree]=sci_diff(tree)
// Copyright INRIA
// M2SCI function
// Conversion function for Matlab diff()
// Input: tree = Matlab funcall tree
// Ouput: tree = Scilab equivalent for tree
// Emulation function: mtlb_diff()
// V.C.
// Y = diff(X)
if rhs==1 then
X=getrhs(tree)
// %c_diff and %b_diff are not defined in Scilab
X=convert2double(X)
tree.rhs=Rhs(X)
dim = first_non_singleton(X)
if dim==-1 then
// All output dims are unknown
tree.lhs(1).dims=allunknown(X.dims)
// First non singleton dimension will be computed at execution
tree.rhs=Rhs(X,1,Funcall("firstnonsingleton",1,list(X),list()))
else
tree.lhs(1).dims=X.dims
if dim==0 then
tree.rhs=Rhs(X)
else
tree.rhs=Rhs(X,1,dim)
tree.lhs(1).dims(dim)=max(X.dims(dim)-1,-1)
end
end
tree.lhs(1).type=Type(Double,Unknown)
// Y = diff(X,n)
elseif rhs==2 then
[X,n] = getrhs(tree);
X = convert2double(X)
n = convert2double(n)
tree.rhs=Rhs(X,n)
if ~is_a_vector(X) then
tree.name="mtlb_diff"
end
tree.lhs(1).dims=allunknown(X.dims)
tree.lhs(1).type=Type(Double,Unknown)
// Y = diff(X,n,dim)
else
[X,n,dim] = getrhs(tree);
X = convert2double(X)
n = convert2double(n)
dim = convert2double(dim)
tree.rhs=Rhs(X,n,dim)
tree.lhs(1).dims=allunknown(X.dims)
tree.lhs(1).type=Type(Double,Unknown)
end
endfunction
|
