plot: add a flag --scale

CHANGELOG.md

@@ -19,9 +19,16 @@
         - do not show progress.
     - `csvtk fix-quotes`:
         - new flag `-b, --buffer-size`.
+    - `csvtk plot`:
+        - new flag `--scale` for scaling the image width/height, tick, axes, line/point and font sizes proportionally, adviced by @tseemann.
     - `csvtk plot line`:
         - only add legend for more than one group. [#279](https://github.com/shenwei356/csvtk/issues/279)
         - sort points by X for plotting lines. [#280](https://github.com/shenwei356/csvtk/issues/280)
+    - `csvtk hist`:
+        - new flags: `--line-width`.
+    - `csvtk box`:
+        - plots of different groups have different colors now.
+        - new flags: `--line-width`, `--point-size`, and `color-index`.
 - [csvtk v0.30.0](https://github.com/shenwei356/csvtk/releases/tag/v0.30.0)
 [![Github Releases (by Release)](https://img.shields.io/github/downloads/shenwei356/csvtk/v0.30.0/total.svg)](https://github.com/shenwei356/csvtk/releases/tag/v0.30.0)
   - `csvtk`:

README.md

@@ -401,7 +401,7 @@ Examples
     group information is the "Group" column.
 
             csvtk -t plot box testdata/grouped_data.tsv.gz -g "Group" \
-                -f "GC Content" --width 3 | display
+                -f "GC Content" --width 3 --title "Box plot" | display
 
       ![boxplot.png](testdata/figures/boxplot.png)
 

csvtk/cmd/box.go

@@ -32,6 +32,7 @@ import (
 	"github.com/spf13/cobra"
 	"gonum.org/v1/plot"
 	"gonum.org/v1/plot/plotter"
+	"gonum.org/v1/plot/plotutil"
 	"gonum.org/v1/plot/vg"
 )
 
@@ -67,6 +68,14 @@ Notes:
 		if skipNA && len(naValues) == 0 {
 			log.Errorf("the value of --na-values should not be empty when using --skip-na")
 		}
+
+		lineWidth := vg.Points(getFlagPositiveFloat64(cmd, "line-width") * plotConfig.scale)
+		pointSize := vg.Length(getFlagPositiveFloat64(cmd, "point-size") * plotConfig.scale)
+		colorIndex := getFlagPositiveInt(cmd, "color-index")
+		if colorIndex > 7 {
+			checkError(fmt.Errorf("unsupported color index"))
+		}
+
 		naMap := make(map[string]interface{}, len(naValues))
 		for _, na := range naValues {
 			naMap[strings.ToLower(na)] = struct{}{}
@@ -148,6 +157,7 @@ Notes:
 		}
 
 		groupNames := make([]string, len(groupOrders))
+		j := colorIndex - 1
 		for i, group := range groupOrders {
 			groupNames[i] = group.Key
 			b, err := plotter.NewBoxPlot(w, float64(i), groups[group.Key])
@@ -156,6 +166,20 @@ Notes:
 				b.Horizontal = true
 			}
 			p.Add(b)
+
+			b.BoxStyle.Color = plotutil.Color(j)
+			b.BoxStyle.Width = lineWidth
+
+			b.MedianStyle.Color = plotutil.Color(j)
+			b.MedianStyle.Width = lineWidth
+
+			b.WhiskerStyle.Color = plotutil.Color(j)
+			b.WhiskerStyle.Width = lineWidth
+
+			b.GlyphStyle.Color = plotutil.Color(j)
+			b.GlyphStyle.Radius = pointSize
+
+			j++
 		}
 
 		if !horiz {
@@ -236,4 +260,8 @@ func init() {
 
 	boxCmd.Flags().Float64P("box-width", "", 0, "box width")
 	boxCmd.Flags().BoolP("horiz", "", false, "horize box plot")
+
+	boxCmd.Flags().Float64P("line-width", "", 1.5, "line width")
+	boxCmd.Flags().Float64P("point-size", "", 3, "point size")
+	boxCmd.Flags().IntP("color-index", "", 1, `color index, 1-7`)
 }

csvtk/cmd/hist.go

@@ -56,6 +56,8 @@ Notes:
 		config := getConfigs(cmd)
 		plotConfig := getPlotConfigs(cmd)
 
+		lineWidth := vg.Points(getFlagPositiveFloat64(cmd, "line-width") * plotConfig.scale)
+
 		files := getFileListFromArgsAndFile(cmd, args, true, "infile-list", true)
 		if len(files) > 1 {
 			checkError(fmt.Errorf("no more than one file should be given"))
@@ -137,6 +139,7 @@ Notes:
 
 		// h.Normalize(1)
 		h.FillColor = plotutil.Color(colorIndex - 1)
+		h.LineStyle.Width = lineWidth
 		p.Add(h)
 
 		p.Title.Text = plotConfig.title
@@ -193,4 +196,6 @@ func init() {
 	histCmd.Flags().IntP("color-index", "", 1, `color index, 1-7`)
 	histCmd.Flags().BoolP("percentiles", "", false, `calculate percentiles`)
 
+	histCmd.Flags().Float64P("line-width", "", 1, "line width")
+
 }

csvtk/cmd/line.go

@@ -62,9 +62,9 @@ Notes:
 		}
 		runtime.GOMAXPROCS(config.NumCPUs)
 
-		lineWidth := vg.Points(getFlagPositiveFloat64(cmd, "line-width"))
-		pointSize := vg.Length(getFlagPositiveFloat64(cmd, "point-size"))
 		scatter := getFlagBool(cmd, "scatter")
+		lineWidth := vg.Points(getFlagPositiveFloat64(cmd, "line-width") * plotConfig.scale)
+		pointSize := vg.Length(getFlagPositiveFloat64(cmd, "point-size") * plotConfig.scale)
 		colorIndex := getFlagPositiveInt(cmd, "color-index")
 		if colorIndex > 7 {
 			checkError(fmt.Errorf("unsupported color index"))
@@ -206,6 +206,7 @@ Notes:
 			if !scatter {
 				lines, points, err := plotter.NewLinePoints(v)
 				checkError(err)
+				fmt.Fprintln(os.Stderr, i)
 				lines.Color = plotutil.Color(i)
 				lines.LineStyle.Dashes = plotutil.Dashes(i)
 				lines.LineStyle.Width = lineWidth

csvtk/cmd/plot.go

@@ -72,6 +72,7 @@ func init() {
 	plotCmd.PersistentFlags().Float64P("axis-width", "", 1.5, "axis width")
 	plotCmd.PersistentFlags().Float64P("tick-width", "", 1.5, "axis tick width")
 	plotCmd.PersistentFlags().IntP("tick-label-size", "", 12, "tick label font size")
+	plotCmd.PersistentFlags().Float64P("scale", "", 1, "scale the image width/height, tick, axes, line/point and font sizes proportionally")
 
 	plotCmd.PersistentFlags().StringP("format", "", "png", `image format for stdout when flag -o/--out-file not given. available values: eps, jpg|jpeg, pdf, png, svg, and tif|tiff.`)
 
@@ -105,13 +106,18 @@ func getPlotConfigs(cmd *cobra.Command) *plotConfigs {
 	}
 
 	config.title = getFlagString(cmd, "title")
-	config.titleSize = vg.Length(getFlagPositiveInt(cmd, "title-size"))
-	config.labelSize = vg.Length(getFlagPositiveInt(cmd, "label-size"))
-	config.width = vg.Length(getFlagPositiveFloat64(cmd, "width"))
-	config.height = vg.Length(getFlagPositiveFloat64(cmd, "height"))
-	config.axisWidth = vg.Length(getFlagPositiveFloat64(cmd, "axis-width"))
-	config.tickWidth = vg.Length(getFlagPositiveFloat64(cmd, "tick-width"))
-	config.tickLabelSize = vg.Length(getFlagPositiveInt(cmd, "tick-label-size"))
+
+	scale := getFlagPositiveFloat64(cmd, "scale")
+	config.scale = scale
+
+	config.titleSize = vg.Length(int(float64(getFlagPositiveInt(cmd, "title-size")) * scale))
+	config.labelSize = vg.Length(int(float64(getFlagPositiveInt(cmd, "label-size")) * scale))
+	config.width = vg.Length(getFlagPositiveFloat64(cmd, "width") * scale)
+	config.height = vg.Length(getFlagPositiveFloat64(cmd, "height") * scale)
+	config.axisWidth = vg.Length(getFlagPositiveFloat64(cmd, "axis-width") * scale)
+	config.tickWidth = vg.Length(getFlagPositiveFloat64(cmd, "tick-width") * scale)
+	config.tickLabelSize = vg.Length(int(float64(getFlagPositiveInt(cmd, "tick-label-size")) * scale))
+
 	config.xlab = getFlagString(cmd, "xlab")
 	config.ylab = getFlagString(cmd, "ylab")
 
@@ -161,6 +167,7 @@ type plotConfigs struct {
 	title, xlab, ylab                     string
 	titleSize, labelSize, tickLabelSize   vg.Length
 	width, height, axisWidth, tickWidth   vg.Length
+	scale                                 float64
 	xmin, xmax, ymin, ymax                float64
 	xminStr, xmaxStr, yminStr, ymaxStr    string
 	format                                string

doc/docs/usage.md

@@ -4180,27 +4180,29 @@ Available Commands:
   line        line plot and scatter plot
 
 Flags:
-      --axis-width float     axis width (default 1.5)
-  -f, --data-field string    column index or column name of data (default "1")
-      --format string        image format for stdout when flag -o/--out-file not given. available
-                             values: eps, jpg|jpeg, pdf, png, svg, and tif|tiff. (default "png")
-  -g, --group-field string   column index or column name of group
-      --height float         Figure height (default 4.5)
-  -h, --help                 help for plot
-      --label-size int       label font size (default 14)
-      --na-values strings    NA values, case ignored (default [,NA,N/A])
-      --skip-na              skip NA values in --na-values
+      --axis-width float      axis width (default 1.5)
+  -f, --data-field string     column index or column name of data (default "1")
+      --format string         image format for stdout when flag -o/--out-file not given. available
+                              values: eps, jpg|jpeg, pdf, png, svg, and tif|tiff. (default "png")
+  -g, --group-field string    column index or column name of group
+      --height float          Figure height (default 4.5)
+  -h, --help                  help for plot
+      --label-size int        label font size (default 14)
+      --na-values strings     NA values, case ignored (default [,NA,N/A])
+      --scale float           scale the image width/height, tick, axes, line/point and font sizes
+                              proportionally (default 1)
+      --skip-na               skip NA values in --na-values
       --tick-label-size int   tick label font size (default 12)
-      --tick-width float     axis tick width (default 1.5)
-      --title string         Figure title
-      --title-size int       title font size (default 16)
-      --width float          Figure width (default 6)
-      --x-max string         maximum value of X axis
-      --x-min string         minimum value of X axis
-      --xlab string          x label text
-      --y-max string         maximum value of Y axis
-      --y-min string         minimum value of Y axis
-      --ylab string          y label text
+      --tick-width float      axis tick width (default 1.5)
+      --title string          Figure title
+      --title-size int        title font size (default 16)
+      --width float           Figure width (default 6)
+      --x-max string          maximum value of X axis
+      --x-min string          minimum value of X axis
+      --xlab string           x label text
+      --y-max string          maximum value of Y axis
+      --y-min string          minimum value of Y axis
+      --ylab string           y label text
 
 ```
 
@@ -4236,8 +4238,11 @@ Usage:
   csvtk plot hist [flags]
 
 Flags:
-      --bins int          number of bins (default 50)
-      --color-index int   color index, 1-7 (default 1)
+      --bins int           number of bins (default 50)
+      --color-index int    color index, 1-7 (default 1)
+  -h, --help               help for hist
+      --line-width float   line width (default 1)
+      --percentiles        calculate percentiles
 
 ```
 
@@ -4284,8 +4289,12 @@ Usage:
   csvtk plot box [flags]
 
 Flags:
-      --box-width float   box width
-      --horiz             horize box plot
+      --box-width float    box width
+      --color-index int    color index, 1-7 (default 1)
+  -h, --help               help for box
+      --horiz              horize box plot
+      --line-width float   line width (default 1.5)
+      --point-size float   point size (default 3)
 
 ```
 
@@ -4329,8 +4338,10 @@ Usage:
   csvtk plot line [flags]
 
 Flags:
+      --color-index int       color index, 1-7 (default 1)
   -x, --data-field-x string   column index or column name of X for command line
   -y, --data-field-y string   column index or column name of Y for command line
+  -h, --help                  help for line
       --legend-left           locate legend along the left edge of the plot
       --legend-top            locate legend along the top edge of the plot
       --line-width float      line width (default 1.5)