Hi,
I am running Stata 10.1 on Mac OS 10.4. The following issue is perplexing me:
-------
mata:
mata clear
polynomial1 = (1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-30,29)
polyeval(polynomial1,1)
polyroots(polynomial1)
-------
The polyeval line makes it clear that x=1 is a root for this polynomial. However, 1 is not a reported result for polyroots. What is odd is that if I add or subtract a zero term to the polynomial, polyroots() will then correctly report x=1 as a root. i.e., the following works:
-------
mata:
mata clear
polynomial1 = (1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-30,29)
polynomial2 = (1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-30,29)
polynomial3 = (1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-30,29)
polyroots(polynomial2)
polyroots(polynomial3)
-------
Does anybody know what is going on here?
Lirac
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