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dna2.jl
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dna2.jl
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abstract Nucleotide2bit
## 2-bit DNA Seq Type ##
type Nucleotide2bitSeq <: Nucleotide2bit
b1::BitVector
b2::BitVector
Nucleotide2bitSeq(b1::BitVector,b2::BitVector) = new(b1,b2)
end
Nucleotide2bitSeq(len::Int) = Nucleotide2bitSeq(BitArray(len),BitArray(len))
## Nucleotide2bitBase Type ##
immutable Nucleotide2bitBase <: Nucleotide2bit
b1::Bool
b2::Bool
Nucleotide2bitBase(b1::Bool,b2::Bool) = new(b1,b2)
end
## Selection ##
getindex(s::Nucleotide2bitSeq,ind::Int) = Nucleotide2bitBase(getindex(s.b1,ind),getindex(s.b2,ind))
getindex(s::Nucleotide2bitSeq,ind...) = Nucleotide2bitSeq(getindex(s.b1,ind...),getindex(s.b2,ind...))
## Assignation ##
function setindex!(s::Nucleotide2bitSeq,x::Nucleotide2bitBase,ind...)
setindex!(s.b1,x.b1,ind...)
setindex!(s.b2,x.b2,ind...)
end
function setindex!(s::Nucleotide2bitSeq,x,ind...)
inseq = convert(Nucleotide2bitBase,x)
setindex!(s.b1,inseq.b1,ind...)
setindex!(s.b2,inseq.b2,ind...)
end
## Copy ##
copy(seq::Nucleotide2bitSeq) = Nucleotide2bitSeq(copy(seq.b1),copy(seq.b2))
## length ##
length(s::Nucleotide2bitSeq) = length(s.b1)
## Convertions ##
## A C T G
## b1 0 0 1 1
## b2 0 1 0 1
const _convert_to_Char = ['A' 'C';'T' 'G']
function convert{T<:Union{Integer, Char}}(::Type{Array{T,1}},s::Nucleotide2bitSeq)
len = length(s)
out = Array(T,len)
for i in 1:len
out[i] = _convert_to_Char[s.b1[i]+1,s.b2[i]+1]
end
out
end
function convert{T<:Union{Integer, Char}}(::Type{T},s::Nucleotide2bitBase)
convert(T,_convert_to_Char[s.b1+1,s.b2+1])
end
const _convert_to_base2_index = zeros(UInt8,256)
_convert_to_base2_index[Int('A')] = 1
_convert_to_base2_index[Int('a')] = 1
_convert_to_base2_index[Int('C')] = 2
_convert_to_base2_index[Int('c')] = 2
_convert_to_base2_index[Int('T')] = 3
_convert_to_base2_index[Int('t')] = 3
_convert_to_base2_index[Int('U')] = 3
_convert_to_base2_index[Int('u')] = 3
_convert_to_base2_index[Int('G')] = 4
_convert_to_base2_index[Int('g')] = 4
const _convert_to_base2 = Array(Nucleotide2bitBase,4)
_convert_to_base2[1] = Nucleotide2bitBase(false,false)
_convert_to_base2[2] = Nucleotide2bitBase(false,true)
_convert_to_base2[3] = Nucleotide2bitBase(true,false)
_convert_to_base2[4] = Nucleotide2bitBase(true,true)
function convert{T<:Union{Integer, Char}}(::Type{Nucleotide2bitSeq},s::Vector{T})
len = length(s)
seq = Nucleotide2bitSeq(len)
for i in 1:len
seq[i] = _convert_to_base2[ _convert_to_base2_index[ s[i] ] ]
end
seq
end
function convert{T<:Union{Integer, Char}}(::Type{Nucleotide2bitBase},s::T)
_convert_to_base2[ _convert_to_base2_index[ s ] ]
end
nucleotide2bit{T<:Union{Integer, Char}}(x::Vector{T}) = convert(Nucleotide2bitSeq,x)
nucleotide2bit{T<:Union{Integer, Char}}(x::T) = convert(Nucleotide2bitBase,x)
macro nt2_str(s); :(nucleotide2bit(@b_str($s))); end
convert(::Type{ASCIIString}, seq::Nucleotide2bitSeq) = ASCIIString(convert(Vector{UInt8},seq))
convert(::Type{Nucleotide2bitSeq}, str::ASCIIString) = nucleotide2bit(str.data)
bytestring(seq::Nucleotide2bitSeq) = bytestring(convert(Vector{UInt8},seq))
nucleotide2bit(x::ASCIIString) = convert(Nucleotide2bitSeq,x)
nucleotide(seq::Nucleotide2bitSeq) = convert(Vector{Nucleotide},seq)
## == ##
promote_rule{T<:Union{Integer, Char},B<:Nucleotide2bit}(::Type{B}, ::Type{T} ) = T
promote_rule{T<:Union{Integer, Char},B<:Nucleotide2bit}(::Type{T}, ::Type{B} ) = T
promote_rule{T<:Union{Integer, Char}}(::Type{Nucleotide2bitSeq}, ::Type{Vector{T}} ) = Vector{T}
promote_rule{T<:Union{Integer, Char}}(::Type{Vector{T}}, ::Type{Nucleotide2bitSeq} ) = Vector{T}
=={T<:Nucleotide2bit}(S1::T, S2::T) = ==(S1.b1,S2.b1) && ==(S1.b2,S2.b2)
=={T<:Union{Integer, Char},B<:Nucleotide2bit}(S1::B, S2::T) = ==(promote(S1,S2)...)
=={T<:Union{Integer, Char},B<:Nucleotide2bit}(S1::T, S2::B) = ==(promote(S1,S2)...)
=={T<:Union{Integer, Char}}(S1::Nucleotide2bitSeq, S2::Vector{T}) = ==(promote(S1,S2)...)
=={T<:Union{Integer, Char}}(S1::Vector{T}, S2::Nucleotide2bitSeq) = ==(promote(S1,S2)...)
# Julia 0.2 compatibility
isequal{T<:Nucleotide2bit}(S1::T, S2::T) = isequal(S1.b1,S2.b1) && isequal(S1.b2,S2.b2)
isequal{T<:Union{Integer, Char},B<:Nucleotide2bit}(S1::B, S2::T) = isequal(promote(S1,S2)...)
isequal{T<:Union{Integer, Char},B<:Nucleotide2bit}(S1::T, S2::B) = isequal(promote(S1,S2)...)
isequal{T<:Union{Integer, Char}}(S1::Nucleotide2bitSeq, S2::Vector{T}) = isequal(promote(S1,S2)...)
isequal{T<:Union{Integer, Char}}(S1::Vector{T}, S2::Nucleotide2bitSeq) = isequal(promote(S1,S2)...)
## Loop ##
isempty(s::Nucleotide2bitSeq) = length(s) == 0
start(s::Nucleotide2bitSeq) = 1
next(s::Nucleotide2bitSeq,i) = (s[i],i+1)
done(s::Nucleotide2bitSeq,i) = (i > length(s))
## Write and Show ##
function show(io::IO,seq::Nucleotide2bitSeq)
len = length(seq)
print(len)
println(" bp Nucleotide2bitSeq:")
if len > 0
screen = Base.tty_size()[1] > 6 ? Base.tty_size()[1] - 5 : Base.tty_size()[1]
if length(seq) <= screen
print(" ")
print(Char(seq[1]))
if(len>1)
for i in 2:len
print("\n")
print(" ")
print(Char(seq[i]))
end
end
else
partlen = Int((screen)/2) - 1
for i in 1:partlen
print(" ")
println(Char(seq[i]))
end
print(" \u22ee")
for i in (len-partlen):len
print("\n")
print(" ")
print(Char(seq[i]))
end
end
end
end
function write(io::IO,seq::Nucleotide2bitSeq)
for bp in seq
write(io,Char(bp))
end
end
show(io::IO,x::Nucleotide2bitBase) = (write(io,UInt8(x)); nothing)
## Complement ##
complement!{T<:Nucleotide2bit}(seq::T) = (seq.b1 = ~seq.b1 ; seq)
complement{T<:Nucleotide2bit}(seq::T) = complement!(copy(seq))
reversecomplement!{T<:Nucleotide2bit}(seq::T) = (reverse!(seq.b1); seq.b1 = ~seq.b1; reverse!(seq.b2); seq )
reversecomplement{T<:Nucleotide2bit}(seq::T) = reversecomplement!(copy(seq))
## Faster using bit level parallelism:
## A C T G
## b1 0 0 1 1
## b2 0 1 0 1
## A: ~ (b1 | b2)
isadenine{T<:Nucleotide2bit}(seq::T) = ~ ( seq.b1 | seq.b2 )
## G: b1 & b2
isguanine{T<:Nucleotide2bit}(seq::T) = seq.b1 & seq.b2
## C: ~b1 & b2
iscytosine{T<:Nucleotide2bit}(seq::T) = ~seq.b1 & seq.b2
## T: b1 & ~b2
isthymine{T<:Nucleotide2bit}(seq::T) = seq.b1 & ~seq.b2
## AT: ~b2
isweak{T<:Nucleotide2bit}(seq::T) = ~seq.b2
## CG: b2
isstrong{T<:Nucleotide2bit}(seq::T) = seq.b2
## CT: b1 $ b2
ispyrimidine{T<:Nucleotide2bit}(seq::T) = seq.b1 $ seq.b2
## AG: ~( b1 $ b2 )
ispurine{T<:Nucleotide2bit}(seq::T) = ~( seq.b1 $ seq.b2 )
function percentGC(seq::Nucleotide2bitSeq)
len = length(seq)
c2 = seq.b2.chunks
chunks_len = length(c2)
sum_ones = 0
for i in 1:chunks_len
sum_ones += count_ones(c2[i])
end
sum_ones/len
end
# Hash as Nucleotide
hash(seq::Nucleotide2bitSeq) = hash(nucleotide(seq))
hash(base::Nucleotide2bitBase) = hash(nucleotide(base))
# Hash Nucleotide2bitSeq as Vector{Nucleotide}
hash(seq::Nucleotide2bitSeq) = hash(nucleotide(seq))
==(S1::Nucleotide2bitSeq, S2::Vector{Nucleotide}) = ==(nucleotide(S1),S2)
==(S1::Vector{Nucleotide}, S2::Nucleotide2bitSeq) = ==(S1,nucleotide(S2))
# Julia 0.2 compatibility
isequal(S1::Nucleotide2bitSeq, S2::Vector{Nucleotide}) = isequal(nucleotide(S1),S2)
isequal(S1::Vector{Nucleotide}, S2::Nucleotide2bitSeq) = isequal(S1,nucleotide(S2))