48 lines
1.3 KiB
Plaintext
48 lines
1.3 KiB
Plaintext
5 rem Plot Gaussian distribution in two dimensions
|
|
10 text: home: PRINT "Std. Dev. = ";: input s1
|
|
20 hgr: hcolor = 3
|
|
30 w = 279: h = 159
|
|
40 w0 = w - 100: w1 = w0/10
|
|
45 h1 = h - 100: h2 = h - 60
|
|
50 k = 0.5: m = 1 / (2 * 3.14159265 * s1 * s1)
|
|
60 for i = 0 to 10 step k
|
|
70 x = 10 * i + 1: y = 10 * i + h1
|
|
75 hplot x,y
|
|
80 for j = 0 to w0 step 1
|
|
85 j1 = 10 * j / w0
|
|
90 d1 = abs(5 - i)
|
|
100 d2 = abs(5 - j1)
|
|
110 r2 = (d1*d1+d2*d2)/(2*s1*s1)
|
|
120 g = exp(-r2)/(2*3.14159*s1*s1)
|
|
130 a = int((h2 * g)/ m)
|
|
140 x = 10 * i + w1 * j1 + 1
|
|
150 y = 10 * i + h1 - a
|
|
160 hplot to x,y
|
|
170 if (i = 0) goto 265
|
|
175 if (j = w0) goto 190
|
|
180 j2 = int(j/10): if ((j/10) <> j2) goto 290
|
|
190 d1 = abs(5 - i + k)
|
|
200 d2 = abs(5 - j1)
|
|
210 r2 = (d1*d1+d2*d2)/(2*s1*s1)
|
|
220 u = exp(-r2)/(2*3.14159*s1*s1)
|
|
225 a1 = int((h2 * u)/ m)
|
|
230 x1 = 10 * (i - k) + w1 * j1 + 1
|
|
240 y1 = 10 * (i - k) + h1 - a1
|
|
245 rem if (y <= y1) goto 290
|
|
250 hplot to x1,y1
|
|
260 hplot x,y
|
|
265 if (j = 0) goto 310
|
|
270 if (i < 10) goto 290
|
|
275 if (j = w0) goto 295
|
|
280 j2 = int(j/10): if ((j/10) = j2) goto 295
|
|
290 hcolor = 0
|
|
295 hplot to x,10 * i + h1
|
|
300 hcolor = 3
|
|
305 hplot x,y
|
|
310 next j
|
|
320 next i
|
|
330 hplot w+1,h: hplot to 100+1,h: hplot to 0+1,h1
|
|
340 vtab 21: print "Gaussian (standard deviation = ";s1;")"
|
|
350 print "Plot from -5.0 to + 5.0"
|
|
360 print "Peak value = "m
|