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function gen(anoise)
c c.l.lawson and r.j.hanson, jet propulsion laboratory, 1972 dec 15
c to appear in 'solving least squares problems', prentice-hall, 1974
c generate numbers for construction of test cases.
mi=891
mj=457
i=5
j=7
aj=0.
c
if (anoise) 10,30,20
10 gen=0.
return
c
c the sequence of values of j is bounded between 1 and 996
c if initial j = 1,2,3,4,5,6,7,8, or 9, the period is 332
c
20 j=j*mj
j=j-997*(j/997)
aj=j-498
c the sequence of values of i is bounded between 1 and 999
c if initial i = 1,2,3,6,7, or 9, the period will be 50
c if initial i = 4 or 8 the period will be 25
c if initial i = 5 the period will be 10
c
30 i=i*mi
i=i-1000*(i/1000)
ai=i-500
gen=ai+aj*anoise
return
end
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