// Draw the plotinum logo.
func Example_logo() *plot.Plot {
p, err := plot.New()
if err != nil {
panic(err)
}
plotter.DefaultLineStyle.Width = vg.Points(1)
plotter.DefaultGlyphStyle.Radius = vg.Points(3)
p.Y.Tick.Marker = plot.ConstantTicks([]plot.Tick{
{0, "0"}, {0.25, ""}, {0.5, "0.5"}, {0.75, ""}, {1, "1"},
})
p.X.Tick.Marker = plot.ConstantTicks([]plot.Tick{
{0, "0"}, {0.25, ""}, {0.5, "0.5"}, {0.75, ""}, {1, "1"},
})
pts := plotter.XYs{{0, 0}, {0, 1}, {0.5, 1}, {0.5, 0.6}, {0, 0.6}}
line := must(plotter.NewLine(pts)).(*plotter.Line)
scatter := must(plotter.NewScatter(pts)).(*plotter.Scatter)
p.Add(line, scatter)
pts = plotter.XYs{{1, 0}, {0.75, 0}, {0.75, 0.75}}
line = must(plotter.NewLine(pts)).(*plotter.Line)
scatter = must(plotter.NewScatter(pts)).(*plotter.Scatter)
p.Add(line, scatter)
pts = plotter.XYs{{0.5, 0.5}, {1, 0.5}}
line = must(plotter.NewLine(pts)).(*plotter.Line)
scatter = must(plotter.NewScatter(pts)).(*plotter.Scatter)
p.Add(line, scatter)
return p
}
// AddLines adds Line plotters to a plot.
// The variadic arguments must be either strings
// or plotter.XYers. Each plotter.XYer is added to
// the plot using the next color and dashes
// shape via the Color and Dashes functions.
// If a plotter.XYer is immediately preceeded by
// a string then a legend entry is added to the plot
// using the string as the name.
//
// If an error occurs then none of the plotters are added
// to the plot, and the error is returned.
func AddLines(plt *plot.Plot, vs ...interface{}) error {
var ps []plot.Plotter
names := make(map[*plotter.Line]string)
name := ""
var i int
for _, v := range vs {
switch t := v.(type) {
case string:
name = t
case plotter.XYer:
l, err := plotter.NewLine(t)
if err != nil {
return err
}
l.Color = Color(i)
l.Dashes = Dashes(i)
i++
ps = append(ps, l)
if name != "" {
names[l] = name
name = ""
}
default:
panic(fmt.Sprintf("AddLines handles strings and plotter.XYers, got %T", t))
}
}
plt.Add(ps...)
for p, n := range names {
plt.Legend.Add(n, p)
}
return nil
}
func (s *Plots) DrawTps() {
p, err := plot.New()
if err != nil {
panic(err)
}
p.Title.Text = "Response Time"
p.X.Label.Text = "Time (seconds)"
p.Y.Label.Text = "Response time (ms)"
p.Add(plotter.NewGrid())
// Make a line plotter and set its style.
l, err := plotter.NewLine(s.intervalsTps)
if err != nil {
panic(err)
}
l.LineStyle.Color = color.RGBA{B: 255, A: 255}
p.Add(l)
p.Legend.Add("line", l)
// Save the plot to a PNG file.
if err := p.Save(128*vg.Inch, 32*vg.Inch, "tps.svg"); err != nil {
panic(err)
}
}
func DataTableToPng(b *bytes.Buffer, dt *db.DataTable, title string, width, height float64, xLabel string) error {
p, err := plot.New()
if err != nil {
return err
}
p.Title.Text = title
p.X.Label.Text = xLabel
p.Y.Label.Text = "msec" // TODO: Fix this.
// TODO: need new ticker function to handle equalX (while keeping xLabel as selected)
if xLabel == common.TimeName {
p.X.Tick.Marker = TimeTicks
}
p.Legend.Top = true
numColumns := len(dt.ColumnNames)
lines := make([]plotter.XYs, numColumns-1) // Skip X column.
for _, dRow := range dt.Data {
xp := (*dRow)[0]
if xp != nil {
for col := 1; col < numColumns; col++ { // Skip X column.
yp := (*dRow)[col]
if yp != nil {
lines[col-1] = append(lines[col-1], struct{ X, Y float64 }{X: *xp, Y: *yp})
}
}
}
}
colorList := getColors(numColumns - 1) // Skip X column.
for i, line := range lines {
columnName := dt.ColumnNames[i+1]
l, err := plotter.NewLine(line)
if err != nil {
return err
}
if strings.Index(columnName, common.RegressNamePrefix) == 0 { // If regression value.
l.LineStyle.Color = color.RGBA{255, 0, 0, 255}
l.LineStyle.Width = vg.Points(2.0)
} else {
l.LineStyle.Color = colorList[i]
l.LineStyle.Width = vg.Points(1.5)
}
p.Add(l)
p.Legend.Add(columnName, l)
}
tPng := time.Now()
drawPng(b, p, width, height)
glog.V(3).Infof("PERF: makePng time: %v", time.Now().Sub(tPng))
return nil
}
func (p *Plot) Write(f string) error {
for i, ln := range p.lines {
l, _ := plotter.NewLine(ln.pts)
l.LineStyle.Width = vg.Points(2)
l.LineStyle.Color = colors[i%len(colors)]
p.p.Legend.Add(ln.name, l)
p.p.Add(l)
}
return p.p.Save(10*vg.Inch, 10*vg.Inch, f)
}
func lines(w vg.Length) (*plot.Plot, error) {
p, err := plot.New()
if err != nil {
return nil, err
}
pts := plotter.XYs{{0, 0}, {0, 1}, {1, 0}, {1, 1}}
line, err := plotter.NewLine(pts)
line.Width = w
if err != nil {
return nil, err
}
p.Add(line)
return p, nil
}
// AddStackedAreaPlots adds stacked area plot plotters to a plot.
// The variadic arguments must be either strings
// or plotter.Valuers. Each valuer adds a stacked area
// plot to the plot below the stacked area plots added
// before it. If a plotter.Valuer is immediately
// preceeded by a string then the string value is used to
// label the legend.
// Plots should be added in order of tallest to shortest,
// because they will be drawn in the order they are added
// (i.e. later plots will be painted over earlier plots).
//
// If an error occurs then none of the plotters are added
// to the plot, and the error is returned.
func AddStackedAreaPlots(plt *plot.Plot, xs plotter.Valuer, vs ...interface{}) error {
var ps []plot.Plotter
names := make(map[*plotter.Line]string)
name := ""
var i int
for _, v := range vs {
switch t := v.(type) {
case string:
name = t
case plotter.Valuer:
if xs.Len() != t.Len() {
return errors.New("X/Y length mismatch")
}
// Make a line plotter and set its style.
l, err := plotter.NewLine(combineXYs{xs: xs, ys: t})
if err != nil {
return err
}
l.LineStyle.Width = vg.Points(0)
color := Color(i)
i++
l.ShadeColor = &color
ps = append(ps, l)
if name != "" {
names[l] = name
name = ""
}
default:
panic(fmt.Sprintf("AddStackedAreaPlots handles strings and plotter.Valuers, got %T", t))
}
}
plt.Add(ps...)
for p, n := range names {
plt.Legend.Add(n, p)
}
return nil
}
func (plt *plttr) addDiscrete(name string, sig Discrete) {
// TODO there appears to be a bug in gonum plot where certain
// dashed lines for a particular result will not render correctly.
// Raw calls of plotutil are just tossed in here for now and avoids
// dashed lines.
l, err := plotter.NewLine(xyer([]float64(sig)))
if err != nil {
panic(err)
}
l.Color = plotutil.Color(plt.nlines)
// l.Dashes = plotutil.Dashes(plt.nlines)
plt.Add(l)
plt.Legend.Add(name, l)
plt.nlines++
}
// Example_points draws some scatter points, a line,
// and a line with points.
func Example_points() *plot.Plot {
rand.Seed(int64(0))
n := 15
scatterData := randomPoints(n)
lineData := randomPoints(n)
linePointsData := randomPoints(n)
p, err := plot.New()
if err != nil {
panic(err)
}
p.Title.Text = "Points Example"
p.X.Label.Text = "X"
p.Y.Label.Text = "Y"
p.Add(plotter.NewGrid())
s := must(plotter.NewScatter(scatterData)).(*plotter.Scatter)
s.GlyphStyle.Color = color.RGBA{R: 255, B: 128, A: 255}
s.GlyphStyle.Radius = vg.Points(3)
l := must(plotter.NewLine(lineData)).(*plotter.Line)
l.LineStyle.Width = vg.Points(1)
l.LineStyle.Dashes = []vg.Length{vg.Points(5), vg.Points(5)}
l.LineStyle.Color = color.RGBA{B: 255, A: 255}
lpLine, lpPoints, err := plotter.NewLinePoints(linePointsData)
if err != nil {
panic(err)
}
lpLine.Color = color.RGBA{G: 255, A: 255}
lpPoints.Shape = draw.CircleGlyph{}
lpPoints.Color = color.RGBA{R: 255, A: 255}
p.Add(s, l, lpLine, lpPoints)
p.Legend.Add("scatter", s)
p.Legend.Add("line", l)
p.Legend.Add("line points", lpLine, lpPoints)
return p
}
func (s *Plots) DrawLats() {
p, err := plot.New()
if err != nil {
panic(err)
}
p.Title.Text = "Response Time"
p.X.Label.Text = "Time (seconds)"
p.Y.Label.Text = "Response time (ms)"
p.Add(plotter.NewGrid())
// Make a scatter plotter and set its style.
scatter, err := plotter.NewScatter(s.points)
if err != nil {
panic(err)
}
scatter.GlyphStyle.Color = color.RGBA{R: 255, B: 128, A: 255}
// Make a line plotter and set its style.
l, err := plotter.NewLine(s.intervalLats)
if err != nil {
panic(err)
}
l.LineStyle.Width = vg.Points(1)
l.LineStyle.Dashes = []vg.Length{vg.Points(5), vg.Points(5)}
l.LineStyle.Color = color.RGBA{B: 255, A: 255}
p.Add(scatter, l)
p.Legend.Add("scatter", scatter)
p.Legend.Add("line", l)
// Save the plot to a PNG file.
if err := p.Save(64*vg.Inch, 24*vg.Inch, "points.png"); err != nil {
panic(err)
}
}
func createBoard(somePlot *plot.Plot) {
pts := make(plotter.XYs, 35)
pts[0].X = float64(8.5)
pts[0].Y = float64(.5)
pts[1].X = float64(.5)
pts[1].Y = float64(.5)
pts[2].X = float64(.5)
pts[2].Y = float64(1.5)
pts[3].X = float64(8.5)
pts[3].Y = float64(1.5)
pts[4].X = float64(8.5)
pts[4].Y = float64(2.5)
pts[5].X = float64(.5)
pts[5].Y = float64(2.5)
pts[6].X = float64(.5)
pts[6].Y = float64(3.5)
pts[7].X = float64(8.5)
pts[7].Y = float64(3.5)
pts[8].X = float64(8.5)
pts[8].Y = float64(4.5)
pts[9].X = float64(.5)
pts[9].Y = float64(4.5)
pts[10].X = float64(.5)
pts[10].Y = float64(5.5)
pts[11].X = float64(8.5)
pts[11].Y = float64(5.5)
pts[12].X = float64(8.5)
pts[12].Y = float64(6.5)
pts[13].X = float64(.5)
pts[13].Y = float64(6.5)
pts[14].X = float64(.5)
pts[14].Y = float64(7.5)
pts[15].X = float64(8.5)
pts[15].Y = float64(7.5)
pts[16].X = float64(8.5)
pts[16].Y = float64(8.5)
pts[17].X = float64(.5)
pts[17].Y = float64(8.5)
pts[18].X = float64(.5)
pts[18].Y = float64(.5)
pts[19].X = float64(1.5)
pts[19].Y = float64(.5)
pts[20].X = float64(1.5)
pts[20].Y = float64(8.5)
pts[21].X = float64(2.5)
pts[21].Y = float64(8.5)
pts[22].X = float64(2.5)
pts[22].Y = float64(.5)
pts[23].X = float64(3.5)
pts[23].Y = float64(.5)
pts[24].X = float64(3.5)
pts[24].Y = float64(8.5)
pts[25].X = float64(4.5)
pts[25].Y = float64(8.5)
pts[26].X = float64(4.5)
pts[26].Y = float64(.5)
pts[27].X = float64(5.5)
pts[27].Y = float64(.5)
pts[28].X = float64(5.5)
pts[28].Y = float64(8.5)
pts[29].X = float64(6.5)
pts[29].Y = float64(8.5)
pts[30].X = float64(6.5)
pts[30].Y = float64(.5)
pts[31].X = float64(7.5)
pts[31].Y = float64(.5)
pts[32].X = float64(7.5)
pts[32].Y = float64(8.5)
pts[33].X = float64(8.5)
pts[33].Y = float64(8.5)
pts[34].X = float64(8.5)
pts[34].Y = float64(.5)
lines, _ := plotter.NewLine(pts)
lines.LineStyle.Width = vg.Points(1)
lines.LineStyle.Color = color.RGBA{R: 0, B: 0, A: 255}
myPlot.Add(lines)
}
func (c *client) run() {
var err error
dir, err := ioutil.TempDir("", "snfusion-web-")
if err != nil {
log.Printf("error creating temporary directory: %v\n", err)
return
}
defer func() {
c.srv.unregister <- c
c.ws.Close()
c.srv = nil
os.RemoveAll(dir)
}()
type params struct {
ID int `json:"id"`
NumIters int `json:"num_iters"`
NumCarbons float64 `json:"num_carbons"`
Seed int64 `json:"seed"`
}
type genReply struct {
ID int `json:"id"`
Stage string `json:"stage"`
Err error `json:"err"`
Msg string `json:"msg"`
Engine sim.Engine `json:"engine"`
}
type plotReply struct {
ID int `json:"id"`
Stage string `json:"stage"`
Err error `json:"err"`
SVG string `json:"svg"`
}
type zipReply struct {
ID int `json:"id"`
Stage string `json:"stage"`
Err error `json:"err"`
Href string `json:"href"`
}
for {
param := params{
NumIters: 100000,
NumCarbons: 60,
Seed: 1234,
}
log.Printf("waiting for simulation parameters...\n")
err = websocket.JSON.Receive(c.ws, ¶m)
if err != nil {
log.Printf("error rcv: %v\n", err)
return
}
id := param.ID
msgbuf := new(bytes.Buffer)
msg := log.New(msgbuf, "snfusion-sim: ", 0)
engine := sim.Engine{
NumIters: param.NumIters,
NumCarbons: param.NumCarbons,
Seed: param.Seed,
}
engine.SetLogger(msg)
log.Printf("processing... %#v\n", engine)
csvbuf := new(bytes.Buffer)
errc := make(chan error)
ticker := time.NewTicker(1 * time.Second)
go func() {
errc <- engine.Run(csvbuf)
ticker.Stop()
}()
err = <-errc
if err != nil {
log.Printf("error: %v\n", err)
_ = websocket.JSON.Send(c.ws, genReply{
ID: id, Err: err, Engine: engine, Stage: "gen-done", Msg: msgbuf.String(),
})
return
}
err = websocket.JSON.Send(c.ws, genReply{
ID: id, Err: err, Engine: engine, Stage: "gen-done", Msg: msgbuf.String(),
})
if err != nil {
log.Printf("error sending data: %v\n", err)
return
}
csvdata := make([]byte, len(csvbuf.Bytes()))
copy(csvdata, csvbuf.Bytes())
log.Printf("running post-processing...\n")
r := csv.NewReader(csvbuf)
r.Comma = ';'
r.Comment = '#'
table := make([]plotter.XYs, len(engine.Population))
for i := range table {
table[i] = make(plotter.XYs, engine.NumIters+1)
}
for ix := 0; ix < engine.NumIters+1; ix++ {
var text []string
text, err = r.Read()
if err != nil {
break
}
for i := range engine.Population {
table[i][ix].X = float64(ix)
table[i][ix].Y = float64(atoi(text[i]))
}
}
if err == io.EOF {
err = nil
}
if err != nil {
log.Printf("error reading data: %v\n", err)
return
}
p, err := plot.New()
if err != nil {
panic(err)
}
p.Title.Text = fmt.Sprintf(
"Time evolution of nuclei C%v-O%v (seed=%d)",
engine.NumCarbons,
100-engine.NumCarbons,
engine.Seed,
)
p.X.Label.Text = "Iteration number"
p.Y.Label.Text = "Atomic mass of nuclei"
for i, n := range engine.Population {
line, err := plotter.NewLine(table[i])
if err != nil {
log.Fatalf(
"error adding data points for nucleus %v: %v\n",
n, err,
)
}
line.LineStyle.Color = col(n)
line.LineStyle.Width = vg.Points(1)
p.Add(line)
p.Legend.Add(label(n), line)
}
p.Add(plotter.NewGrid())
p.Legend.Top = true
p.Legend.XOffs = -1 * vg.Centimeter
figX := 25 * vg.Centimeter
figY := figX / vg.Length(math.Phi)
// Create a Canvas for writing SVG images.
canvas := vgsvg.New(figX, figY)
// Draw to the Canvas.
p.Draw(draw.New(canvas))
outsvg := new(bytes.Buffer)
_, err = canvas.WriteTo(outsvg)
if err != nil {
log.Printf("error svg: %v\n", err)
return
}
err = websocket.JSON.Send(c.ws, plotReply{
ID: id, Err: err, SVG: outsvg.String(), Stage: "plot-done",
})
if err != nil {
log.Printf("error sending data: %v\n", err)
return
}
pngcanvas := vgimg.PngCanvas{Canvas: vgimg.New(figX, figY)}
p.Draw(draw.New(pngcanvas))
outpng := new(bytes.Buffer)
_, err = pngcanvas.WriteTo(outpng)
if err != nil {
log.Printf("error png: %v\n", err)
return
}
href := filepath.Join(dir, fmt.Sprintf("output-%d.zip", id))
zipf, err := os.Create(href)
if err != nil {
log.Printf("error creating zip file: %v\n", err)
}
defer zipf.Close()
zipw := zip.NewWriter(zipf)
defer zipw.Close()
for _, file := range []struct {
Name string
Body []byte
}{
{"output.csv", csvdata},
{"output.png", outpng.Bytes()},
} {
ff, err := zipw.Create(file.Name)
if err != nil {
log.Printf("error creating zip content %v: %v\n", file.Name, err)
return
}
_, err = ff.Write(file.Body)
if err != nil {
log.Printf("error writing zip content %v: %v\n", file.Name, err)
return
}
}
err = zipw.Close()
if err != nil {
log.Printf("error closing zip-writer: %v\n", err)
return
}
err = zipf.Close()
if err != nil {
log.Printf("error closing zip-file: %v\n", err)
return
}
err = websocket.JSON.Send(c.ws, zipReply{
ID: id, Err: err, Href: href, Stage: "zip-done",
})
if err != nil {
log.Printf("error sending zip: %v\n", err)
return
}
log.Printf("saved report under %v\n", href)
}
}
func TestPersistency(t *testing.T) {
// Get some random points
rand.Seed(0) // The default random seed is 1.
n := 15
scatterData := randomPoints(n)
lineData := randomPoints(n)
linePointsData := randomPoints(n)
p, err := plot.New()
if err != nil {
t.Fatalf("error creating plot: %v\n", err)
}
p.Title.Text = "Plot Example"
p.X.Label.Text = "X"
p.Y.Label.Text = "Y"
// Use a custom tick marker function that computes the default
// tick marks and re-labels the major ticks with commas.
p.Y.Tick.Marker = commaTicks{}
// Draw a grid behind the data
p.Add(plotter.NewGrid())
// Make a scatter plotter and set its style.
s, err := plotter.NewScatter(scatterData)
if err != nil {
panic(err)
}
s.GlyphStyle.Color = color.RGBA{R: 255, B: 128, A: 255}
// Make a line plotter and set its style.
l, err := plotter.NewLine(lineData)
if err != nil {
panic(err)
}
l.LineStyle.Width = vg.Points(1)
l.LineStyle.Dashes = []vg.Length{vg.Points(5), vg.Points(5)}
l.LineStyle.Color = color.RGBA{B: 255, A: 255}
// Make a line plotter with points and set its style.
lpLine, lpPoints, err := plotter.NewLinePoints(linePointsData)
if err != nil {
panic(err)
}
lpLine.Color = color.RGBA{G: 255, A: 255}
lpPoints.Shape = draw.PyramidGlyph{}
lpPoints.Color = color.RGBA{R: 255, A: 255}
// Add the plotters to the plot, with a legend
// entry for each
p.Add(s, l, lpLine, lpPoints)
p.Legend.Add("scatter", s)
p.Legend.Add("line", l)
p.Legend.Add("line points", lpLine, lpPoints)
// Save the plot to a PNG file.
err = p.Save(4, 4, "test-persistency.png")
if err != nil {
t.Fatalf("error saving to PNG: %v\n", err)
}
defer os.Remove("test-persistency.png")
buf := new(bytes.Buffer)
enc := gob.NewEncoder(buf)
err = enc.Encode(p)
if err != nil {
t.Fatalf("error gob-encoding plot: %v\n", err)
}
// TODO(sbinet): impl. BinaryMarshal for plot.Plot and vg.Font
// {
// dec := gob.NewDecoder(buf)
// var p plot.Plot
// err = dec.Decode(&p)
// if err != nil {
// t.Fatalf("error gob-decoding plot: %v\n", err)
// }
// // Save the plot to a PNG file.
// err = p.Save(4, 4, "test-persistency-readback.png")
// if err != nil {
// t.Fatalf("error saving to PNG: %v\n", err)
// }
// defer os.Remove("test-persistency-readback.png")
// }
}
func main() {
ifname := flag.String("f", "output.csv", "input CSV file to analyze")
ofname := flag.String("o", "output.png", "output PNG file")
flag.Parse()
log.SetPrefix("snfusion-plot: ")
log.SetFlags(0)
f, err := os.Open(*ifname)
if err != nil {
log.Fatalf("error opening %s: %v\n", *ifname, err)
}
defer f.Close()
var engine sim.Engine
var hdr []byte
{
scanner := bufio.NewScanner(f)
for scanner.Scan() {
data := scanner.Bytes()
if !bytes.HasPrefix(data, []byte("#")) {
break
}
if !bytes.HasPrefix(data, sim.HeaderCSV) {
continue
}
hdr = make([]byte, len(data)-len(sim.HeaderCSV))
copy(hdr, data[len(sim.HeaderCSV):])
break
}
err = scanner.Err()
if err == io.EOF {
err = nil
}
if err != nil {
log.Fatalf("error peeking at meta-data: %v\n", err)
}
if len(hdr) == 0 {
log.Fatalf("could not find meta-data in file %s\n",
*ifname,
)
}
_, err = f.Seek(0, 0)
if err != nil {
log.Fatalf("error rewinding input file %s: %v\n",
*ifname,
err,
)
}
}
err = json.Unmarshal(hdr, &engine)
if err != nil {
log.Fatalf("error reading meta-data: %v\n", err)
}
log.Printf("plotting...\n")
log.Printf("NumIters: %d\n", engine.NumIters)
log.Printf("NumCarbons: %v\n", engine.NumCarbons)
log.Printf("Seed: %d\n", engine.Seed)
log.Printf("Nuclei: %v\n", engine.Population)
r := csv.NewReader(f)
r.Comma = ';'
r.Comment = '#'
table := make([]plotter.XYs, len(engine.Population))
for i := range table {
table[i] = make(plotter.XYs, engine.NumIters+1)
}
for ix := 0; ix < engine.NumIters+1; ix++ {
var text []string
text, err = r.Read()
if err != nil {
break
}
for i := range engine.Population {
table[i][ix].X = float64(ix)
table[i][ix].Y = float64(atoi(text[i]))
}
}
if err == io.EOF {
err = nil
}
if err != nil {
log.Fatalf("error reading data: %v\n", err)
}
p, err := plot.New()
if err != nil {
panic(err)
}
p.Title.Text = fmt.Sprintf(
"Time evolution of nuclei C%v-O%v (seed=%d)",
engine.NumCarbons,
100-engine.NumCarbons,
engine.Seed,
)
p.X.Label.Text = "Iteration number"
p.Y.Label.Text = "Atomic mass of nuclei"
for i, n := range engine.Population {
line, err := plotter.NewLine(table[i])
if err != nil {
log.Fatalf(
"error adding data points for nucleus %v: %v\n",
n, err,
)
}
line.LineStyle.Color = col(n)
line.LineStyle.Width = vg.Points(1)
p.Add(line)
p.Legend.Add(label(n), line)
}
p.Add(plotter.NewGrid())
p.Legend.Top = true
p.Legend.XOffs = -1 * vg.Centimeter
figX := 25 * vg.Centimeter
figY := figX / vg.Length(phi)
// Save the plot to a PNG file.
if err := p.Save(figX, figY, *ofname); err != nil {
panic(err)
}
}
