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modified post e0bfcc287f by Anonymous on Fri 3rd Feb 2023 10:59
original post 20667d by Anonymous on Wed 1st Feb 2023 14:22
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-- test1.lua - simple function plotter in lua

1	1		-- test1.lua - simple function plotter in lua
2	2		-- written by Roland Mainz <roland.mainz@nrubsig.org>
3	3
4	4		-- Terminal size
5		-	TermSize = {w = 70, h = 20}
	5	+	TermSize = {w = 376-2, h = 119-2}
6	6
7	7
8	8		function term_clear ()
9	9		io.write("\27[2J")
10	10		end
11	11
12	12		function term_cup (x,y)
13	13		io.write(
14	14		string.format("\27[%d;%dH",
15	15		math.floor(y),
16	16		math.floor(x)
17	17		)
18	18		)
19	19		end
20	20
21	21
22	22		-- plot a function
23	23		-- (assume that domain&&image are in the range [-1,+1])
24	24		function plot (f)
	25	+	local i
26	28
	29	+	term_clear()
27	31		for i=1, TermSize.w do
28		-	local x = (i/TermSize.w)*2 - 1
	32	+	x = (i/TermSize.w)*2 - 1
29		-	local y = (f(x) + 1)/2 * TermSize.h
	33	+	y = (f(x) + 1)/2 * TermSize.h
30	34
31	35		term_cup(i, y)
32	36		io.write('X')
33	37		end
34	38
35	39		-- move cursor to the bottom
36	40		term_cup(1, TermSize.h+1)
37	41		end
38	42
39		-	plot(function (x) return math.sin(x2math.pi) end)
	43	+	plot(function (x) return math.sin(x2math.pi)math.sin(x3*math.pi) end)
40	44
41	45		-- EOF.
42	46
43	47