I'm not sure that it comes across as a "matrix problem" in the sense
of involving matrix algebra, but it's also possible that I don't
understand what you are saying. Seems that an appropriate application
of:
?abs
?max
?sapply
?which.min
... ought to do the trick. If you were hoping for the name of the
column vector, then may also need to look at:
?names
--
David Winsemius
On Jan 18, 2009, at 7:17 AM, glenn wrote:
Dear All,
Could someone give me some pointers (just a guide as to what
functions I
need to look at would be fine)
as to how I go about this simple problem please;
The problem looks like this;
Choose x1 to x4 such that you minimize the MAXIMUM ABSOLUTE value
returned
in the vector result of this matrix problem;
[x1,x2,x3,x4].[ -0.38 -0.52 0.68 -0.29 ]
[ -0.39 -0.42 -0.12 0.49 ]
[ -0.40 -0.20 -0.45 0.26 ]
[ -0.39 0.03 -0.39 -0.36 ]
I hope the formatting comes out ok , I did this on a Mac !
Glenn
[[alternative HTML version deleted]]
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