// Init initialises FORM structure
func (o *ReliabFORM) Init(μ, σ []float64, lrv []bool, gfcn ReliabGfcn_t, hfcn ReliabHfcn_t) {
// input
o.μ = μ
o.σ = σ
o.lrv = lrv
o.gfcn = gfcn
o.hfcn = hfcn
// default constants
o.NmaxItA = 10
o.NmaxItB = 10
o.TolA = 0.001
o.TolB = 0.001
o.NlsSilent = true
o.NlsCheckJ = false
o.NlsCheckJtol = 1e-9
// allocate slices
nx := len(μ)
chk.IntAssert(len(σ), nx)
chk.IntAssert(len(lrv), nx)
o.α = make([]float64, nx)
o.xtmp = make([]float64, nx)
o.dgdx = make([]float64, nx)
}
func Test_nurbs02(tst *testing.T) {
//verbose()
chk.PrintTitle("nurbs02")
// NURBS
b := FactoryNurbs2dPlateHole()
elems := b.Elements()
nbasis := b.GetElemNumBasis()
io.Pforan("nbasis = %v\n", nbasis)
chk.IntAssert(nbasis, 9) // orders := (2,2) => nbasis = (2+1)*(2+1) = 9
// check basis and elements
chk.Ints(tst, "elem[0]", elems[0], []int{2, 3, 2, 3})
chk.Ints(tst, "elem[1]", elems[1], []int{3, 4, 2, 3})
chk.Ints(tst, "ibasis0", b.IndBasis(elems[0]), []int{0, 1, 2, 4, 5, 6, 8, 9, 10})
chk.Ints(tst, "ibasis1", b.IndBasis(elems[1]), []int{1, 2, 3, 5, 6, 7, 9, 10, 11})
chk.IntAssert(b.GetElemNumBasis(), len(b.IndBasis(elems[0])))
// check derivatives
b.CheckDerivs(tst, 11, 1e-5, false)
// refine NURBS
c := b.KrefineN(2, false)
elems = c.Elements()
chk.IntAssert(c.GetElemNumBasis(), len(c.IndBasis(elems[0])))
// check refined elements
io.Pf("\n------------ refined -------------\n")
chk.Ints(tst, "elem[0]", elems[0], []int{2, 3, 2, 3})
chk.Ints(tst, "elem[1]", elems[1], []int{3, 4, 2, 3})
chk.Ints(tst, "elem[2]", elems[2], []int{4, 5, 2, 3})
chk.Ints(tst, "elem[3]", elems[3], []int{5, 6, 2, 3})
chk.Ints(tst, "elem[4]", elems[4], []int{2, 3, 3, 4})
chk.Ints(tst, "elem[5]", elems[5], []int{3, 4, 3, 4})
chk.Ints(tst, "elem[6]", elems[6], []int{4, 5, 3, 4})
chk.Ints(tst, "elem[7]", elems[7], []int{5, 6, 3, 4})
// check refined basis
chk.Ints(tst, "ibasis0", c.IndBasis(elems[0]), []int{0, 1, 2, 6, 7, 8, 12, 13, 14})
chk.Ints(tst, "ibasis1", c.IndBasis(elems[1]), []int{1, 2, 3, 7, 8, 9, 13, 14, 15})
chk.Ints(tst, "ibasis2", c.IndBasis(elems[2]), []int{2, 3, 4, 8, 9, 10, 14, 15, 16})
chk.Ints(tst, "ibasis3", c.IndBasis(elems[3]), []int{3, 4, 5, 9, 10, 11, 15, 16, 17})
chk.Ints(tst, "ibasis4", c.IndBasis(elems[4]), []int{6, 7, 8, 12, 13, 14, 18, 19, 20})
chk.Ints(tst, "ibasis5", c.IndBasis(elems[5]), []int{7, 8, 9, 13, 14, 15, 19, 20, 21})
chk.Ints(tst, "ibasis6", c.IndBasis(elems[6]), []int{8, 9, 10, 14, 15, 16, 20, 21, 22})
chk.Ints(tst, "ibasis7", c.IndBasis(elems[7]), []int{9, 10, 11, 15, 16, 17, 21, 22, 23})
// plot
if chk.Verbose {
io.Pf("\n------------ plot -------------\n")
la := 0 + 0*b.n[0]
lb := 2 + 1*b.n[0]
PlotNurbs("/tmp/gosl/gm", "nurbs02a.png", b, 41, true, nil)
PlotNurbsBasis("/tmp/gosl/gm", "nurbs02b.png", b, la, lb)
PlotNurbsDerivs("/tmp/gosl/gm", "nurbs02c.png", b, la, lb)
PlotTwoNurbs("/tmp/gosl/gm", "nurbs02d.png", b, c, 41, true, nil)
}
}
func Test_frees01a(tst *testing.T) {
// finalise analysis process and catch errors
defer End()
//verbose()
chk.PrintTitle("frees01a")
// start simulation
if !Start("data/frees01.sim", true, chk.Verbose) {
chk.Panic("cannot start FE simulation")
}
// domain
distr := false
dom := NewDomain(Global.Sim.Regions[0], distr)
if dom == nil {
chk.Panic("cannot run FE simulation")
}
// set stage
if !dom.SetStage(0, Global.Sim.Stages[0], distr) {
chk.Panic("cannot set stage\n")
}
// nodes and elements
chk.IntAssert(len(dom.Nodes), 62)
chk.IntAssert(len(dom.Elems), 15)
// vertices with "fl"
seepverts := map[int]bool{3: true, 45: true, 7: true, 49: true, 11: true, 53: true, 15: true, 57: true, 19: true, 61: true, 23: true}
// check dofs
var seepeqs []int
for _, nod := range dom.Nodes {
if seepverts[nod.Vert.Id] {
chk.IntAssert(len(nod.Dofs), 2)
seepeqs = append(seepeqs, nod.Dofs[1].Eq)
} else {
chk.IntAssert(len(nod.Dofs), 1)
}
}
sort.Ints(seepeqs)
io.Pforan("seepeqs = %v\n", seepeqs)
chk.Ints(tst, "seepeqs", seepeqs, []int{14, 16, 19, 30, 32, 43, 45, 56, 58, 69, 71})
// check Fmap
e2 := dom.Elems[2].(*ElemP)
chk.Ints(tst, "e2.Fmap", e2.Fmap, []int{14, 16, 19})
e5 := dom.Elems[5].(*ElemP)
chk.Ints(tst, "e5.Fmap", e5.Fmap, []int{16, 30, 32})
e8 := dom.Elems[8].(*ElemP)
chk.Ints(tst, "e8.Fmap", e8.Fmap, []int{30, 43, 45})
e11 := dom.Elems[11].(*ElemP)
chk.Ints(tst, "e11.Fmap", e11.Fmap, []int{43, 56, 58})
e14 := dom.Elems[14].(*ElemP)
chk.Ints(tst, "e14.Fmap", e14.Fmap, []int{56, 69, 71})
}
func Test_frees01a(tst *testing.T) {
//verbose()
chk.PrintTitle("frees01a")
// start simulation
analysis := NewFEM("data/frees01.sim", "", true, false, false, false, chk.Verbose, 0)
// set stage
err := analysis.SetStage(0)
if err != nil {
tst.Errorf("SetStage failed:\n%v", err)
return
}
// initialise solution vectros
err = analysis.ZeroStage(0, true)
if err != nil {
tst.Errorf("ZeroStage failed:\n%v", err)
return
}
// domain
dom := analysis.Domains[0]
// nodes and elements
chk.IntAssert(len(dom.Nodes), 62)
chk.IntAssert(len(dom.Elems), 15)
// vertices with "fl"
seepverts := map[int]bool{3: true, 45: true, 7: true, 49: true, 11: true, 53: true, 15: true, 57: true, 19: true, 61: true, 23: true}
// check dofs
var seepeqs []int
for _, nod := range dom.Nodes {
if seepverts[nod.Vert.Id] {
chk.IntAssert(len(nod.Dofs), 2)
seepeqs = append(seepeqs, nod.Dofs[1].Eq)
} else {
chk.IntAssert(len(nod.Dofs), 1)
}
}
sort.Ints(seepeqs)
io.Pforan("seepeqs = %v\n", seepeqs)
chk.Ints(tst, "seepeqs", seepeqs, []int{14, 16, 19, 30, 32, 43, 45, 56, 58, 69, 71})
// check Fmap
e2 := dom.Elems[2].(*ElemP)
chk.Ints(tst, "e2.Fmap", e2.Fmap, []int{14, 16, 19})
e5 := dom.Elems[5].(*ElemP)
chk.Ints(tst, "e5.Fmap", e5.Fmap, []int{16, 30, 32})
e8 := dom.Elems[8].(*ElemP)
chk.Ints(tst, "e8.Fmap", e8.Fmap, []int{30, 43, 45})
e11 := dom.Elems[11].(*ElemP)
chk.Ints(tst, "e11.Fmap", e11.Fmap, []int{43, 56, 58})
e14 := dom.Elems[14].(*ElemP)
chk.Ints(tst, "e14.Fmap", e14.Fmap, []int{56, 69, 71})
}
// PlotTwoVarsContour plots contour for two variables problem. len(x) == 2
// Input
// dirout -- directory to save files
// fnkey -- file name key for eps figure
// x -- solution. can be <nil>
// np -- number of points for contour
// extra -- called just before saving figure
// axequal -- axis.equal
// vmin -- min 0 values
// vmax -- max 1 values
// f -- function to plot filled contour. can be <nil>
// gs -- functions to plot contour @ level 0. can be <nil>
func PlotTwoVarsContour(dirout, fnkey string, x []float64, np int, extra func(), axequal bool,
vmin, vmax []float64, f TwoVarsFunc_t, gs ...TwoVarsFunc_t) {
if fnkey == "" {
return
}
chk.IntAssert(len(vmin), 2)
chk.IntAssert(len(vmax), 2)
V0, V1 := utl.MeshGrid2D(vmin[0], vmax[0], vmin[1], vmax[1], np, np)
var Zf [][]float64
var Zg [][][]float64
if f != nil {
Zf = la.MatAlloc(np, np)
}
if len(gs) > 0 {
Zg = utl.Deep3alloc(len(gs), np, np)
}
xtmp := make([]float64, 2)
for i := 0; i < np; i++ {
for j := 0; j < np; j++ {
xtmp[0], xtmp[1] = V0[i][j], V1[i][j]
if f != nil {
Zf[i][j] = f(xtmp)
}
for k, g := range gs {
Zg[k][i][j] = g(xtmp)
}
}
}
plt.Reset()
plt.SetForEps(0.8, 350)
if f != nil {
cmapidx := 0
plt.Contour(V0, V1, Zf, io.Sf("fsz=7, cmapidx=%d", cmapidx))
}
for k, _ := range gs {
plt.ContourSimple(V0, V1, Zg[k], false, 8, "zorder=5, levels=[0], colors=['yellow'], linewidths=[2], clip_on=0")
}
if x != nil {
plt.PlotOne(x[0], x[1], "'r*', label='optimum', zorder=10")
}
if extra != nil {
extra()
}
if dirout == "" {
dirout = "."
}
plt.Cross("clr='grey'")
plt.SetXnticks(11)
plt.SetYnticks(11)
if axequal {
plt.Equal()
}
plt.AxisRange(vmin[0], vmax[0], vmin[1], vmax[1])
args := "leg_out='1', leg_ncol=4, leg_hlen=1.5"
plt.Gll("$x_0$", "$x_1$", args)
plt.SaveD(dirout, fnkey+".eps")
}
// Set copies states
// Note: 1) this and other states must have been pre-allocated with the same sizes
// 2) this method does not check for errors
func (o *OnedState) Set(other *OnedState) {
o.Sig = other.Sig
o.Dgam = other.Dgam
o.Loading = other.Loading
chk.IntAssert(len(o.Alp), len(other.Alp))
chk.IntAssert(len(o.Phi), len(other.Phi))
copy(o.Alp, other.Alp)
copy(o.Phi, other.Phi)
o.F = other.F
}
func Test_mylab09(tst *testing.T) {
//verbose()
chk.PrintTitle("mylab09. arg min and max")
u := []float64{1, 2, 3, -5, 60, -10, 8}
imin, imax := DblArgMinMax(u)
io.Pforan("imin = %v (5)\n", imin)
io.Pforan("imax = %v (4)\n", imax)
chk.IntAssert(imin, 5)
chk.IntAssert(imax, 4)
}
// SetIniIvs sets initial ivs for given values in sol and ivs map
func (o *ElemUP) SetIniIvs(sol *Solution, ivs map[string][]float64) (err error) {
// set p-element first
err = o.P.SetIniIvs(sol, nil)
if err != nil {
return
}
// initial stresses given
if _, okk := ivs["svT"]; okk {
// total vertical stresses and K0
nip := len(o.U.IpsElem)
svT := ivs["svT"]
K0s := ivs["K0"]
chk.IntAssert(len(svT), nip)
chk.IntAssert(len(K0s), 1)
K0 := K0s[0]
// for each integration point
sx := make([]float64, nip)
sy := make([]float64, nip)
sz := make([]float64, nip)
for i, ip := range o.U.IpsElem {
// compute pl @ ip
err = o.P.Cell.Shp.CalcAtIp(o.P.X, ip, false)
if err != nil {
return
}
pl := 0.0
for m := 0; m < o.P.Cell.Shp.Nverts; m++ {
pl += o.P.Cell.Shp.S[m] * sol.Y[o.P.Pmap[m]]
}
// compute effective stresses
p := pl * o.P.States[i].A_sl
svE := svT[i] + p
shE := K0 * svE
sx[i], sy[i], sz[i] = shE, svE, shE
if o.Ndim == 3 {
sx[i], sy[i], sz[i] = shE, shE, svE
}
}
ivs = map[string][]float64{"sx": sx, "sy": sy, "sz": sz}
}
// set u-element
return o.U.SetIniIvs(sol, ivs)
}
func Test_hist01(tst *testing.T) {
//verbose()
chk.PrintTitle("hist01")
lims := []float64{0, 1, 2, 3, 4, 5}
hist := Histogram{Stations: lims}
idx := hist.FindBin(-3.3)
chk.IntAssert(idx, -1)
idx = hist.FindBin(7.0)
chk.IntAssert(idx, -1)
for i, x := range lims {
idx = hist.FindBin(x)
io.Pforan("x=%g idx=%d\n", x, idx)
if i < len(lims)-1 {
chk.IntAssert(idx, i)
} else {
chk.IntAssert(idx, -1)
}
}
idx = hist.FindBin(0.5)
chk.IntAssert(idx, 0)
idx = hist.FindBin(1.5)
chk.IntAssert(idx, 1)
idx = hist.FindBin(2.5)
chk.IntAssert(idx, 2)
idx = hist.FindBin(3.99999999999999)
chk.IntAssert(idx, 3)
idx = hist.FindBin(4.999999)
chk.IntAssert(idx, 4)
hist.Count([]float64{
0, 0.1, 0.2, 0.3, 0.9, // 5
1, 1, 1, 1.2, 1.3, 1.4, 1.5, 1.99, // 8
2, 2.5, // 2
3, 3.5, // 2
4.1, 4.5, 4.9, // 3
-3, -2, -1,
5, 6, 7, 8,
}, true)
io.Pforan("counts = %v\n", hist.Counts)
chk.Ints(tst, "counts", hist.Counts, []int{5, 8, 2, 2, 3})
labels := hist.GenLabels("%g")
io.Pforan("labels = %v\n", labels)
}
func Test_nurbs03(tst *testing.T) {
//verbose()
chk.PrintTitle("nurbs03")
// NURBS
b := FactoryNurbs1dCurveA()
elems := b.Elements()
nbasis := b.GetElemNumBasis()
io.Pforan("nbasis = %v\n", nbasis)
chk.IntAssert(nbasis, 4) // orders := (3,) => nbasis = (3+1) = 4
// check basis and elements
chk.Ints(tst, "elem[0]", elems[0], []int{3, 4})
chk.Ints(tst, "elem[1]", elems[1], []int{4, 5})
chk.Ints(tst, "elem[2]", elems[2], []int{5, 6})
chk.Ints(tst, "ibasis0", b.IndBasis(elems[0]), []int{0, 1, 2, 3})
chk.Ints(tst, "ibasis1", b.IndBasis(elems[1]), []int{1, 2, 3, 4})
chk.Ints(tst, "ibasis2", b.IndBasis(elems[2]), []int{2, 3, 4, 5})
// refine NURBS
c := b.Krefine([][]float64{
{0.15, 0.5, 0.85},
})
// plot
if chk.Verbose {
PlotNurbs("/tmp/gosl/gm", "nurbs03a.png", b, 41, true, nil)
PlotTwoNurbs("/tmp/gosl/gm", "nurbs03b.png", b, c, 41, true, nil)
}
}
// RouletteSelect selects n individuals
// Input:
// cumprob -- cumulated probabilities (from sorted population)
// sample -- a list of random numbers; can be nil
// Output:
// selinds -- selected individuals (indices). len(selinds) == nsel
func RouletteSelect(selinds []int, cumprob []float64, sample []float64) {
nsel := len(selinds)
chk.IntAssertLessThanOrEqualTo(nsel, len(cumprob))
if sample == nil {
var s float64
for i := 0; i < nsel; i++ {
s = rand.Float64()
for j, m := range cumprob {
if m > s {
selinds[i] = j
break
}
}
}
return
}
chk.IntAssert(len(sample), nsel)
for i, s := range sample {
for j, m := range cumprob {
if m > s {
selinds[i] = j
break
}
}
}
}
func Test_mylab09(tst *testing.T) {
//verbose()
chk.PrintTitle("mylab09. arg min and max and L2norm")
u := []float64{1, 2, 3, -5, 60, -10, 8}
imin, imax := DblArgMinMax(u)
io.Pforan("imin = %v (5)\n", imin)
io.Pforan("imax = %v (4)\n", imax)
chk.IntAssert(imin, 5)
chk.IntAssert(imax, 4)
v := []float64{0, 1, 8, 0, -1, 3, 4}
d := L2norm(u, v)
io.Pforan("d = %v\n", d)
chk.Scalar(tst, "L2(u,v)", 1e-17, d, 62.912637840103322)
}
func Test_nurbs01(tst *testing.T) {
//verbose()
chk.PrintTitle("nurbs01")
msh, err := ReadMsh("data", "nurbs01.msh", 0)
if err != nil {
tst.Errorf("test failed:\n%v", err)
return
}
for _, cell := range msh.Cells {
p0, p1 := cell.Shp.Nurbs.Ord(0), cell.Shp.Nurbs.Ord(1)
io.Pfcyan("cell # %d : NURBS orders = (%d,%d)\n", cell.Id, p0, p1)
chk.IntAssert(p0, 2)
chk.IntAssert(p1, 2)
}
}
// CumSum returns the cumulative sum of the elements in p
// Input:
// p -- values
// Output:
// cs -- cumulated sum; pre-allocated with len(cs) == len(p)
func CumSum(cs, p []float64) {
if len(p) < 1 {
return
}
chk.IntAssert(len(cs), len(p))
cs[0] = p[0]
for i := 1; i < len(p); i++ {
cs[i] = cs[i-1] + p[i]
}
}
// Point returns the x-y-z coordinates of a point on Bezier curve
func (o *BezierQuad) Point(C []float64, t float64) {
if len(o.Q) != 3 {
chk.Panic("Point: quadratic Bezier must be initialised first (with 3 control points)")
}
ndim := len(o.Q[0])
chk.IntAssert(len(C), ndim)
for i := 0; i < ndim; i++ {
C[i] = (1.0-t)*(1.0-t)*o.Q[0][i] + 2.0*t*(1.0-t)*o.Q[1][i] + t*t*o.Q[2][i]
}
return
}
// ConnectSet connects set of parameters
func (o *Prms) ConnectSet(V []*float64, names []string, caller string) (err string) {
chk.IntAssert(len(V), len(names))
for i, name := range names {
prm := o.Find(name)
if prm == nil {
return io.Sf("cannot find parameter named %q as requested by %q\n", name, caller)
}
prm.Connect(V[i])
}
return
}
func Test_hist02(tst *testing.T) {
//verbose()
chk.PrintTitle("hist02")
lims := []int{0, 1, 2, 3, 4, 5}
hist := IntHistogram{Stations: lims}
idx := hist.FindBin(-3)
chk.IntAssert(idx, -1)
idx = hist.FindBin(7)
chk.IntAssert(idx, -1)
for i, x := range lims {
idx = hist.FindBin(x)
io.Pforan("x=%g idx=%d\n", x, idx)
if i < len(lims)-1 {
chk.IntAssert(idx, i)
} else {
chk.IntAssert(idx, -1)
}
}
hist.Count([]int{
0, 0, 0, 0, 0, // 5
1, 1, 1, 1, 1, 1, 1, 1, // 8
2, 2, // 2
3, 3, // 2
4, 4, 4, // 3
-3, -2, -1,
5, 6, 7, 8,
}, true)
io.Pforan("counts = %v\n", hist.Counts)
chk.Ints(tst, "counts", hist.Counts, []int{5, 8, 2, 2, 3})
labels := hist.GenLabels("%d")
io.Pforan("labels = %v\n", labels)
}
// DblsParetoMinProb compares two vectors using Pareto's optimal criterion
// φ ∃ [0,1] is a scaling factor that helps v win even if it's not smaller.
// If φ==0, deterministic analysis is carried out. If φ==1, probabilistic analysis is carried out.
// As φ → 1, v "gets more help".
// Note: (1) minimum dominates (is better)
// (2) v dominates if !u_dominates
func DblsParetoMinProb(u, v []float64, φ float64) (u_dominates bool) {
chk.IntAssert(len(u), len(v))
var pu, pv float64
for i := 0; i < len(u); i++ {
pu += ProbContestSmall(u[i], v[i], φ)
pv += ProbContestSmall(v[i], u[i], φ)
}
pu /= float64(len(u))
if FlipCoin(pu) {
u_dominates = true
}
return
}
func Test_cubiceq02(tst *testing.T) {
//verbose()
chk.PrintTitle("cubiceq02. y(x) = x³ + x²")
a, b, c := 1.0, 0.0, 0.0
x1, x2, x3, nx := EqCubicSolveReal(a, b, c)
io.Pforan("\na=%v b=%v c=%v\n", a, b, c)
io.Pfcyan("nx=%v\n", nx)
io.Pfcyan("x1=%v x2=%v x3=%v\n", x1, x2, x3)
chk.IntAssert(nx, 2)
chk.Scalar(tst, "x1", 1e-17, x1, -1)
chk.Scalar(tst, "x2", 1e-17, x2, 0)
}
// SimpleOutput implements a simple output function
func SimpleOutput(first bool, dx, x float64, y []float64, args ...interface{}) (err error) {
chk.IntAssert(len(args), 1)
res := args[0].(*Results)
res.Dx = append(res.Dx, dx)
res.X = append(res.X, x)
ndim := len(y)
if len(res.Y) == 0 {
res.Y = utl.DblsAlloc(ndim, 0)
}
for j := 0; j < ndim; j++ {
res.Y[j] = append(res.Y[j], y[j])
}
return
}
// FilterPairs generates 2 lists with ninds/2 items each corresponding to selected pairs
// for reprodoction. Repeated indices in pairs are avoided.
// Input:
// selinds -- list of selected individuals len(selinds) == ninds
// Output:
// A and B -- [ninds/2] lists with pairs
func FilterPairs(A, B []int, selinds []int) {
ninds := len(selinds)
chk.IntAssert(len(A), ninds/2)
chk.IntAssert(len(B), ninds/2)
var a, b int
var aux []int
for i := 0; i < ninds/2; i++ {
a, b = selinds[2*i], selinds[2*i+1]
if a == b {
if len(aux) == 0 {
aux = rnd.IntGetShuffled(selinds)
} else {
rnd.IntShuffle(aux)
}
for _, s := range aux {
if s != a {
b = s
break
}
}
}
A[i], B[i] = a, b
}
}
func Test_cubiceq01(tst *testing.T) {
//verbose()
chk.PrintTitle("cubiceq01. y(x) = x³ - 3x² - 144x + 432")
a, b, c := -3.0, -144.0, 432.0
x1, x2, x3, nx := EqCubicSolveReal(a, b, c)
io.Pforan("\na=%v b=%v c=%v\n", a, b, c)
io.Pfcyan("nx=%v\n", nx)
io.Pfcyan("x1=%v x2=%v x3=%v\n", x1, x2, x3)
chk.IntAssert(nx, 3)
chk.Scalar(tst, "x1", 1e-17, x1, -12)
chk.Scalar(tst, "x2", 1e-17, x2, 12)
chk.Scalar(tst, "x3", 1e-14, x3, 3)
}
func Test_simplechromo01(tst *testing.T) {
//verbose()
chk.PrintTitle("simplechromo01")
rnd.Init(0)
nbases := 2
for i := 0; i < 10; i++ {
chromo := SimpleChromo([]float64{1, 10, 100}, nbases)
io.Pforan("chromo = %v\n", chromo)
chk.IntAssert(len(chromo), 3*nbases)
chk.Scalar(tst, "gene0", 1e-14, chromo[0]+chromo[1], 1)
chk.Scalar(tst, "gene1", 1e-14, chromo[2]+chromo[3], 10)
chk.Scalar(tst, "gene2", 1e-13, chromo[4]+chromo[5], 100)
}
}
// Scaling computes a scaled version of the input slice with results in [0.0, 1.0]
// Input:
// x -- values
// ds -- δs value to be added to all 's' values
// tol -- tolerance for capturing xmax ≅ xmin
// reverse -- compute reverse series;
// i.e. 's' decreases from 1 to 0 while x goes from xmin to xmax
// useinds -- if (xmax-xmin)<tol, use indices to generate the 's' slice;
// otherwise, 's' will be filled with δs + zeros
// Ouptut:
// s -- scaled series; pre--allocated with len(s) == len(x)
// xmin, xmax -- min(x) and max(x)
func Scaling(s, x []float64, ds, tol float64, reverse, useinds bool) (xmin, xmax float64) {
if len(x) < 2 {
return
}
n := len(x)
chk.IntAssert(len(s), n)
xmin, xmax = x[0], x[0]
for i := 1; i < n; i++ {
if x[i] < xmin {
xmin = x[i]
}
if x[i] > xmax {
xmax = x[i]
}
}
dx := xmax - xmin
if dx < tol {
if useinds {
N := float64(n - 1)
if reverse {
for i := 0; i < n; i++ {
s[i] = ds + float64(n-1-i)/N
}
return
}
for i := 0; i < n; i++ {
s[i] = ds + float64(i)/N
}
return
}
for i := 0; i < n; i++ {
s[i] = ds
}
return
}
if reverse {
for i := 0; i < n; i++ {
s[i] = ds + (xmax-x[i])/dx
}
return
}
for i := 0; i < n; i++ {
s[i] = ds + (x[i]-xmin)/dx
}
return
}
// Init initialises graph
// Input:
// edges -- [nedges][2] edges (connectivity)
// weightsE -- [nedges] weights of edges. can be <nil>
// verts -- [nverts][ndim] vertices. can be <nil>
// weightsV -- [nverts] weights of vertices. can be <nil>
func (o *Graph) Init(edges [][]int, weightsE []float64, verts [][]float64, weightsV []float64) {
o.Edges, o.WeightsE = edges, weightsE
o.Verts, o.WeightsV = verts, weightsV
o.Shares = make(map[int][]int)
o.Key2edge = make(map[int]int)
for k, edge := range o.Edges {
i, j := edge[0], edge[1]
utl.IntIntsMapAppend(&o.Shares, i, k)
utl.IntIntsMapAppend(&o.Shares, j, k)
o.Key2edge[o.HashEdgeKey(i, j)] = k
}
if o.Verts != nil {
chk.IntAssert(len(o.Verts), len(o.Shares))
}
nv := len(o.Shares)
o.Dist = utl.DblsAlloc(nv, nv)
o.Next = utl.IntsAlloc(nv, nv)
}
// TextHist prints a text histogram
// Input:
// labels -- labels
// counts -- frequencies
func TextHist(labels []string, counts []int, barlen int) string {
// check
chk.IntAssert(len(labels), len(counts))
if len(counts) < 2 {
return "counts slice is too short\n"
}
// scale
fmax := counts[0]
lmax := 0
Lmax := 0
for i, f := range counts {
fmax = imax(fmax, f)
lmax = imax(lmax, len(labels[i]))
Lmax = imax(Lmax, len(io.Sf("%d", f)))
}
if fmax < 1 {
return io.Sf("max frequency is too small: fmax=%d\n", fmax)
}
scale := float64(barlen) / float64(fmax)
// print
sz := io.Sf("%d", lmax+1)
Sz := io.Sf("%d", Lmax+1)
l := ""
total := 0
for i, f := range counts {
l += io.Sf("%"+sz+"s | %"+Sz+"d ", labels[i], f)
n := int(float64(f) * scale)
if f > 0 { // TODO: improve this
n += 1
}
for j := 0; j < n; j++ {
l += "#"
}
l += "\n"
total += f
}
sz = io.Sf("%d", lmax+3)
l += io.Sf("%"+sz+"s %"+Sz+"d\n", "count =", total)
return l
}
func Test_nurbs04(tst *testing.T) {
//verbose()
chk.PrintTitle("nurbs04")
// NURBS
a := FactoryNurbs2dPlateHole()
b := a.KrefineN(2, false)
c := a.KrefineN(4, false)
// tolerace for normalised space comparisons
tol := 1e-7
// tags
a_vt := tag_verts(a, tol)
a_ct := map[string]int{
"0_0": -1,
"0_1": -2,
}
b_vt := tag_verts(b, tol)
c_vt := tag_verts(c, tol)
// write .msh files
WriteMshD("/tmp/gosl/gm", "m_nurbs04a", []*Nurbs{a}, a_vt, a_ct, tol)
WriteMshD("/tmp/gosl/gm", "m_nurbs04b", []*Nurbs{b}, b_vt, nil, tol)
WriteMshD("/tmp/gosl/gm", "m_nurbs04c", []*Nurbs{c}, c_vt, nil, tol)
// read .msh file back and check
a_read := ReadMsh("/tmp/gosl/gm/m_nurbs04a")[0]
chk.IntAssert(a_read.gnd, a.gnd)
chk.Ints(tst, "p", a.p, a_read.p)
chk.Ints(tst, "n", a.n, a_read.n)
chk.Deep4(tst, "Q", 1.0e-17, a.Q, a_read.Q)
chk.IntMat(tst, "l2i", a.l2i, a_read.l2i)
// plot
if chk.Verbose {
PlotNurbs("/tmp/gosl/gm", "nurbs04a.png", a_read, 41, true, nil)
PlotTwoNurbs("/tmp/gosl/gm", "nurbs04b.png", a, b, 41, true, nil)
PlotTwoNurbs("/tmp/gosl/gm", "nurbs04c.png", a, c, 41, true, nil)
}
}
// Init initialises the circle
func (o *Circle) Init(xc []float64, r float64) {
// check: circle works in 2D only
ndim := 2
chk.IntAssert(len(xc), ndim)
// save input data
o.Xc = make([]float64, ndim)
copy(o.Xc, xc)
o.R = r
// allocate auxiliary variables
o.Xa = make([]float64, ndim)
o.Xb = make([]float64, ndim)
o.e = make([]float64, ndim)
o.e0 = make([]float64, ndim)
o.v = make([]float64, ndim)
o.p = make([]float64, ndim)
o.q = make([]float64, ndim)
}
func Test_circint02(tst *testing.T) {
verbose()
chk.PrintTitle("circint02. sloped line (increasing). 2 intersec")
var circ Circle
xc := []float64{8, 8}
r := 9.0
circ.Init(xc, r)
pa, pb := []float64{4, 2}, []float64{18, 9}
ni := circ.SegmentIntersect(pa, pb)
io.Pf("ni = %v\n", ni)
io.Pf("pa = %v\n", pa)
io.Pf("pb = %v\n", pb)
io.Pf("circ.Xa = %v\n", circ.Xa)
io.Pf("circ.Xb = %v\n", circ.Xb)
chk.IntAssert(ni, 2)
chk.Vector(tst, "circ.Xa", 1e-4, circ.Xa, []float64{2.2135, 1.10675})
chk.Vector(tst, "circ.Xb", 1e-4, circ.Xb, []float64{16.9865, 8.49325})
}
func Test_circint03(tst *testing.T) {
verbose()
chk.PrintTitle("circint03. sloped line (decreasing). 2 intersec")
var circ Circle
xc := []float64{5, -5}
r := 3.0
circ.Init(xc, r)
pa, pb := []float64{2, 0}, []float64{9, -11.5}
ni := circ.SegmentIntersect(pa, pb)
io.Pf("ni = %v\n", ni)
io.Pf("pa = %v\n", pa)
io.Pf("pb = %v\n", pb)
io.Pf("Xa = %v\n", circ.Xa)
io.Pf("Xb = %v\n", circ.Xb)
chk.IntAssert(ni, 2)
chk.Vector(tst, "Xa", 1e-2, circ.Xa, []float64{3.4719, -2.4181})
chk.Vector(tst, "Xb", 1e-2, circ.Xb, []float64{6.5917, -7.5435})
}
