From 5dc2a4619b82b1f36dd5f0de48adfb51778f3ebc Mon Sep 17 00:00:00 2001
From: "Andrew E. Torda" <torda@zbh.uni-hamburg.de>
Date: Mon, 3 May 2021 17:28:14 +0200
Subject: [PATCH] It does not work. It works as well as it ever will. If you
have more then 80 points in your data set, only the first 80 will be printed.
There is no x-axis. There is just a list of points. Scaling does not help. I
did, however, get it to work in black and white.
---
go.mod | 1 +
screenplot.go | 80 ++++++++++++++++++++++++++++++++-------------------
2 files changed, 52 insertions(+), 29 deletions(-)
diff --git a/go.mod b/go.mod
index 2ac83b2..623f9bd 100644
--- a/go.mod
+++ b/go.mod
@@ -4,5 +4,6 @@ go 1.16
require (
github.com/gizak/termui/v3 v3.1.0
+ github.com/nsf/termbox-go v0.0.0-20190121233118-02980233997d
gonum.org/v1/plot v0.9.0
)
diff --git a/screenplot.go b/screenplot.go
index aa61dc3..358c5ae 100644
--- a/screenplot.go
+++ b/screenplot.go
@@ -3,54 +3,87 @@
package main
import (
- "fmt"
"math"
+
ui "github.com/gizak/termui/v3"
"github.com/gizak/termui/v3/widgets"
+ tb "github.com/nsf/termbox-go"
)
-func breaker(x interface{}) {}
-func copyToData (y []float32) ([][]float64){
+// render overrides the library function. It was not respecting
+// background color, so I trashed it.
+func render(items ...ui.Drawable) {
+ for _, item := range items {
+ buf := ui.NewBuffer(item.GetRect())
+ item.Lock()
+ item.Draw(buf)
+ item.Unlock()
+ for point, cell := range buf.CellMap {
+ if point.In(buf.Rectangle) {
+ tb.SetCell(
+ point.X, point.Y,
+ cell.Rune,
+ tb.Attribute(tb.ColorWhite), tb.ColorBlack,
+ )
+ }
+ }
+ }
+ tb.Flush()
+}
+
+// copyToData puts the data in a slice of slices with crazy
+// unnecessary double precision.
+func copyToData(y []float32) [][]float64 {
data := make([]float64, len(y))
for i := range y {
data[i] = float64(y[i])
}
- data[0] = data[1]
return [][]float64{data}
}
-
+// wipeFirst Takes the first n entries and sets them to the n+1'th
+// so we effectively discard the first entries where the estimates are
+// so bad. We do not have to return anything, since the slice is a
+// reference structure anyway.
+func wipeFirst(x []float64, n int) {
+ for i := 0; i < n; i++ {
+ x[i] = x[n]
+ }
+}
+
+// scrnPlot puts the data in a retro-look plot.
func scrnPlt(pi, stdErr []float32) error {
- fmt.Println()
+ const toWipe = 12
marker := widgets.MarkerDot
dotMarkerRune := '.'
-
p1 := widgets.NewPlot()
- p1.Title = "π"
- p1.Data = copyToData (pi)
+ p1.Title = " π "
+ p1.Data = copyToData(pi)
+ wipeFirst(p1.Data[0], toWipe)
p1.Marker = marker
p1.DotMarkerRune = dotMarkerRune
- p1.PlotType = widgets.ScatterPlot
- p1.Border = true
p2 := widgets.NewPlot()
+ p2.PlotType = widgets.ScatterPlot
p2.Title = "standard error"
- p2.Data = copyToData (stdErr)
+ p2.Data = copyToData(stdErr)
p2.DotMarkerRune = dotMarkerRune
p2.Marker = marker
+ wipeFirst(p2.Data[0], toWipe)
p3 := widgets.NewPlot()
p3.Title = "abs error"
{
- d := make ([]float64, len(pi))
+ d := make([]float64, len(pi))
for i, piV := range pi {
- d[i] = math.Pi - float64(piV)
+ d[i] = math.Abs(math.Pi - float64(piV))
}
p3.Data = [][]float64{d}
+ wipeFirst(p3.Data[0], toWipe)
}
-
-
+ p3.DotMarkerRune = dotMarkerRune
+ p3.Marker = marker
if err := ui.Init(); err != nil {
return err
@@ -59,8 +92,8 @@ func scrnPlt(pi, stdErr []float32) error {
grid := ui.NewGrid()
termWidth, termHeight := ui.TerminalDimensions()
grid.SetRect(0, 0, termWidth, termHeight)
- grid.Set (ui.NewRow(1./3, p1), ui.NewRow(1./3, p2), ui.NewRow(1./3, p3))
-
+ grid.Set(ui.NewRow(1./3, p1), ui.NewRow(1./3, p2), ui.NewRow(1./3, p3))
+
render(grid)
for e := range ui.PollEvents() {
if e.Type == ui.KeyboardEvent {
@@ -69,14 +102,3 @@ func scrnPlt(pi, stdErr []float32) error {
}
return nil
}
-
-// This was how I wanted to do it, but the library does
-// not seem to respect background colours.
-// ui.Theme = thm
-// nrmlStyle := ui.NewStyle (ui.ColorWhite, ui.ColorBlack)
-// thm := ui.Theme
-// thm.Block.Title = nrmlStyle
-// thm.Plot.Axes = ui.ColorWhite
-// thm.Plot.Lines = []ui.Color{ui.ColorWhite}
-// thm.Default = ui.NewStyle(ui.ColorWhite, ui.ColorBlack)
-// thm.Block.Border = nrmlStyle
--
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