1 basic plotting example with axis titles and 3 more ones using scrip…

…t mode (#205)

examples/plot_line_axis_titles/main.v

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+module main
+
+import math
+import vsl.plot
+
+fn main() {
+	x := []f64{len: 100, init: f64(index) * 0.1}
+	y1 := x.map(math.sin(it))
+	y2 := x.map(math.cos(it))
+
+	mut plt := plot.Plot.new()
+	plt.scatter(
+		x: x
+		y: y1
+		mode: 'lines'
+		line: plot.Line{
+			color: '#FF0000'
+		}
+		name: 'sin(x)'
+	)
+	plt.scatter(
+		x: x
+		y: y2
+		mode: 'lines'
+		line: plot.Line{
+			color: '#0000FF'
+		}
+		name: 'cos(x)'
+	)
+	plt.layout(
+		title: 'Line Plot with axis titles'
+		xaxis: plot.Axis { 
+			title: plot.AxisTitle { 'x' } 
+		}
+		yaxis: plot.Axis { 
+			title: plot.AxisTitle { 'f(x)' } 
+		}
+	)
+	plt.show()!
+}

examples/script_mode_ac_signal/main.v

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+import vsl.plot
+import vsl.util
+import math
+
+
+f := 60.0	// Hz
+beta := 0.5	// rad
+a0 := 10	// V
+
+t := util.lin_space(0, 2*(1/f), 150)	// 2 periods
+y := t.map(math.sin(2*math.pi*f*it + beta))	// AC signal: y = A₀·sin(2πft + β)
+
+mut plt := plot.Plot.new()
+
+plt.scatter(
+	x: t
+	y: y
+)
+
+plt.layout(
+	title: 'AC signal (60Hz)'
+	xaxis: plot.Axis { 
+		title: plot.AxisTitle { 'time [s]' } 
+	}
+	yaxis: plot.Axis { 
+		title: plot.AxisTitle { 'amplitude [V]' } 
+	}
+)
+
+plt.show()!

examples/script_mode_simple_plot/main.v

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+import vsl.plot
+import vsl.util
+import math
+
+
+t := util.lin_space(-math.pi, math.pi, 50)
+y := []f64{len: t.len, init: math.sin(t[index])}
+
+mut plt := plot.Plot.new()
+
+plt.scatter(
+	x: t
+	y: y
+)
+
+plt.show()!

examples/script_mode_three_phase_signal/main.v

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+import vsl.plot
+import vsl.util
+import math
+
+
+f := 60.0	// Hz
+a0 := 100	// V
+
+t := util.lin_space(0, 2*(1/f), 100)	// 2 periods
+y1 := t.map(a0*math.sin(2*math.pi*f*it))	// y₁ = A₀·sin(2πft)
+y2 := t.map(a0*math.sin(2*math.pi*f*it + 2*math.pi/3))	// y₂ = A₀·sin(2πft + 2π/3)
+y3 := t.map(a0*math.sin(2*math.pi*f*it + 4*math.pi/3))	// y₃ = A₀·sin(2πft + 4π/3)
+
+mut plt := plot.Plot.new()
+
+plt.scatter(
+	x: t
+	y: y1
+	name: 'y1(t)'
+)
+
+plt.scatter(
+	x: t
+	y: y2
+	name: 'y2(t)'
+)
+
+plt.scatter(
+	x: t
+	y: y3
+	name: 'y3(t)'
+)
+
+plt.layout(
+	title: 'Three-phase system (60Hz)'
+	xaxis: plot.Axis { 
+		title: plot.AxisTitle { 'time [s]' } 
+	}
+	yaxis: plot.Axis { 
+		title: plot.AxisTitle { 'amplitude [V]' } 
+	}
+)
+
+plt.show()!