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using StaticArrays | |
import StaticArrays.SUnitRange | |
@noinline function inv2(a::StaticMatrix{4,4}) | |
# See http://www.freevec.org/function/inverse_matrix_4x4_using_partitioning | |
# Partition | |
i1 = SUnitRange(1,2) | |
i2 = SUnitRange(3,4) | |
@inbounds P = a[i1,i1] |
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solve_divisor{T}(::Type{T},a,b,N) = solve_divisor(convert(T, a), convert(T, b), convert(T, N)) | |
function solve_divisor{T}(a::T, b::T, N::T) | |
#x = nextfloat(typemin(T)) | |
x = T(1) | |
while x < 2 #prevfloat(typemax(T)) | |
if ((a*x)*N)/(x*N) == a && ((b*x)*N)/(x*N) == b | |
return x | |
end | |
x = nextfloat(x) |
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#include <stdio.h> | |
#include <stdlib.h> | |
int main() | |
{ | |
FILE* f = fopen("AUSGeoid09_GDA94_V1.01_DOV.txt", "r"); | |
if (!f || fscanf(f, "%*[^\n]\n") != 0) | |
return 1; | |
int hlen = 10; | |
int hindex = 0; |
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module SimpleSymbolic | |
immutable S{Ex} | |
x::Ex | |
end | |
macro S(ex) | |
Expr(:call, :S, Expr(:quote, ex)) | |
end |
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module GeneratedTypes | |
# First an example of a simple "generic" type | |
immutable GenericImmutable{FieldNames, FieldTypes<:Tuple} | |
fieldvalues::FieldTypes | |
end | |
@generated function getfield{FieldNames, FieldTypes, Name}(gi::GenericImmutable{FieldNames,FieldTypes},::Type{Val{Name}}) | |
fieldnumber = findfirst(FieldNames, Name) | |
fieldnumber > 0 || error("Field $name not found") |
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using DualNumbers | |
# Solve the matrix system | |
# | |
# B = U'*M + M'*U | |
# | |
# for M where B is symmetric and U is upper triangular. This looks a bit like | |
# the *-Sylvester equation, but has significantly more symmetry. | |
function tri_ss_solve!{T<:Base.LinAlg.BlasFloat}(M::AbstractArray{T,2}, U::AbstractArray{T,2}, B::AbstractArray{T,2}) | |
# This turns out to be a forward substitution algorithm in terms of the |
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