feat(modules): migrate to go modules and bump go version 1.14.4

- migrate to go module
- bump go version 1.14.4

Signed-off-by: prateekpandey14 <prateek.pandey@mayadata.io>

vendor/gonum.org/v1/gonum/mat/format.go

@@ -0,0 +1,238 @@
+// Copyright ©2013 The Gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package mat
+
+import (
+	"fmt"
+	"strconv"
+)
+
+// Formatted returns a fmt.Formatter for the matrix m using the given options.
+func Formatted(m Matrix, options ...FormatOption) fmt.Formatter {
+	f := formatter{
+		matrix: m,
+		dot:    '.',
+	}
+	for _, o := range options {
+		o(&f)
+	}
+	return f
+}
+
+type formatter struct {
+	matrix  Matrix
+	prefix  string
+	margin  int
+	dot     byte
+	squeeze bool
+}
+
+// FormatOption is a functional option for matrix formatting.
+type FormatOption func(*formatter)
+
+// Prefix sets the formatted prefix to the string p. Prefix is a string that is prepended to
+// each line of output.
+func Prefix(p string) FormatOption {
+	return func(f *formatter) { f.prefix = p }
+}
+
+// Excerpt sets the maximum number of rows and columns to print at the margins of the matrix
+// to m. If m is zero or less all elements are printed.
+func Excerpt(m int) FormatOption {
+	return func(f *formatter) { f.margin = m }
+}
+
+// DotByte sets the dot character to b. The dot character is used to replace zero elements
+// if the result is printed with the fmt ' ' verb flag. Without a DotByte option, the default
+// dot character is '.'.
+func DotByte(b byte) FormatOption {
+	return func(f *formatter) { f.dot = b }
+}
+
+// Squeeze sets the printing behaviour to minimise column width for each individual column.
+func Squeeze() FormatOption {
+	return func(f *formatter) { f.squeeze = true }
+}
+
+// Format satisfies the fmt.Formatter interface.
+func (f formatter) Format(fs fmt.State, c rune) {
+	if c == 'v' && fs.Flag('#') {
+		fmt.Fprintf(fs, "%#v", f.matrix)
+		return
+	}
+	format(f.matrix, f.prefix, f.margin, f.dot, f.squeeze, fs, c)
+}
+
+// format prints a pretty representation of m to the fs io.Writer. The format character c
+// specifies the numerical representation of elements; valid values are those for float64
+// specified in the fmt package, with their associated flags. In addition to this, a space
+// preceding a verb indicates that zero values should be represented by the dot character.
+// The printed range of the matrix can be limited by specifying a positive value for margin;
+// If margin is greater than zero, only the first and last margin rows/columns of the matrix
+// are output. If squeeze is true, column widths are determined on a per-column basis.
+//
+// format will not provide Go syntax output.
+func format(m Matrix, prefix string, margin int, dot byte, squeeze bool, fs fmt.State, c rune) {
+	rows, cols := m.Dims()
+
+	var printed int
+	if margin <= 0 {
+		printed = rows
+		if cols > printed {
+			printed = cols
+		}
+	} else {
+		printed = margin
+	}
+
+	prec, pOk := fs.Precision()
+	if !pOk {
+		prec = -1
+	}
+
+	var (
+		maxWidth int
+		widths   widther
+		buf, pad []byte
+	)
+	if squeeze {
+		widths = make(columnWidth, cols)
+	} else {
+		widths = new(uniformWidth)
+	}
+	switch c {
+	case 'v', 'e', 'E', 'f', 'F', 'g', 'G':
+		if c == 'v' {
+			buf, maxWidth = maxCellWidth(m, 'g', printed, prec, widths)
+		} else {
+			buf, maxWidth = maxCellWidth(m, c, printed, prec, widths)
+		}
+	default:
+		fmt.Fprintf(fs, "%%!%c(%T=Dims(%d, %d))", c, m, rows, cols)
+		return
+	}
+	width, _ := fs.Width()
+	width = max(width, maxWidth)
+	pad = make([]byte, max(width, 2))
+	for i := range pad {
+		pad[i] = ' '
+	}
+
+	first := true
+	if rows > 2*printed || cols > 2*printed {
+		first = false
+		fmt.Fprintf(fs, "Dims(%d, %d)\n", rows, cols)
+	}
+
+	skipZero := fs.Flag(' ')
+	for i := 0; i < rows; i++ {
+		if !first {
+			fmt.Fprint(fs, prefix)
+		}
+		first = false
+		var el string
+		switch {
+		case rows == 1:
+			fmt.Fprint(fs, "[")
+			el = "]"
+		case i == 0:
+			fmt.Fprint(fs, "⎡")
+			el = "⎤\n"
+		case i < rows-1:
+			fmt.Fprint(fs, "⎢")
+			el = "⎥\n"
+		default:
+			fmt.Fprint(fs, "⎣")
+			el = "⎦"
+		}
+
+		for j := 0; j < cols; j++ {
+			if j >= printed && j < cols-printed {
+				j = cols - printed - 1
+				if i == 0 || i == rows-1 {
+					fmt.Fprint(fs, "...  ...  ")
+				} else {
+					fmt.Fprint(fs, "          ")
+				}
+				continue
+			}
+
+			v := m.At(i, j)
+			if v == 0 && skipZero {
+				buf = buf[:1]
+				buf[0] = dot
+			} else {
+				if c == 'v' {
+					buf = strconv.AppendFloat(buf[:0], v, 'g', prec, 64)
+				} else {
+					buf = strconv.AppendFloat(buf[:0], v, byte(c), prec, 64)
+				}
+			}
+			if fs.Flag('-') {
+				fs.Write(buf)
+				fs.Write(pad[:widths.width(j)-len(buf)])
+			} else {
+				fs.Write(pad[:widths.width(j)-len(buf)])
+				fs.Write(buf)
+			}
+
+			if j < cols-1 {
+				fs.Write(pad[:2])
+			}
+		}
+
+		fmt.Fprint(fs, el)
+
+		if i >= printed-1 && i < rows-printed && 2*printed < rows {
+			i = rows - printed - 1
+			fmt.Fprintf(fs, "%s .\n%[1]s .\n%[1]s .\n", prefix)
+			continue
+		}
+	}
+}
+
+func maxCellWidth(m Matrix, c rune, printed, prec int, w widther) ([]byte, int) {
+	var (
+		buf        = make([]byte, 0, 64)
+		rows, cols = m.Dims()
+		max        int
+	)
+	for i := 0; i < rows; i++ {
+		if i >= printed-1 && i < rows-printed && 2*printed < rows {
+			i = rows - printed - 1
+			continue
+		}
+		for j := 0; j < cols; j++ {
+			if j >= printed && j < cols-printed {
+				continue
+			}
+
+			buf = strconv.AppendFloat(buf, m.At(i, j), byte(c), prec, 64)
+			if len(buf) > max {
+				max = len(buf)
+			}
+			if len(buf) > w.width(j) {
+				w.setWidth(j, len(buf))
+			}
+			buf = buf[:0]
+		}
+	}
+	return buf, max
+}
+
+type widther interface {
+	width(i int) int
+	setWidth(i, w int)
+}
+
+type uniformWidth int
+
+func (u *uniformWidth) width(_ int) int   { return int(*u) }
+func (u *uniformWidth) setWidth(_, w int) { *u = uniformWidth(w) }
+
+type columnWidth []int
+
+func (c columnWidth) width(i int) int   { return c[i] }
+func (c columnWidth) setWidth(i, w int) { c[i] = w }