ANEW -mathtext_demo

NEEDS -gnuplot

DOC
(*
	import numpy as np
	import matplotlib.pyplot as plt
	t = np.arange(0.0, 2.0, 0.01)
	s = np.sin(2*np.pi*t)

	plt.plot(t,s)
	plt.title(r'$\alpha_i > \beta_i$', fontsize=20)
	plt.text(1, -0.6, r'$\sum_{i=0}^\infty x_i$', fontsize=20)
	plt.text(0.6, 0.6, r'$\mathcal{A}\mathrm{sin}(2 \omega t)$',
		 fontsize=20)
	plt.xlabel('time (s)')
	plt.ylabel('volts (mV)')

*)
ENDDOC

: sin(2*pi*t) PI*2 F* FSIN ;

: mathtext ( -- )
	0 FIGURE CLF  FALSE GRID
	S" {/=20 %\alpha%_i > %\beta%_i }" TITLE
	S" time (s)" XLABEL
	S" voltage (mV)" YLABEL
	  1e -0.6e  S" {/=20 @%\sum%@___{i=0}^^%\infinity% x_i }" GTEXT
	0.6e  0.6e  S" {/=20 A sin(2%\omega%t) }"		  GTEXT
	0e 2e S" blue" ['] sin(2*pi*t) #100 FPLOT ;