Displaying 3 results from an estimated 3 matches for "shimrit".
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shimmin
2009 Feb 24
2
Tracing gradient during optimization
...-1, maxit = 2000));
which gives very little information:
initial value 3.056998
final value 2.978351
converged
Specifying trace >1, for instance trace = 20, does not result in more
information. Is there a way to view more details of the progress perhaps by
using another optimizer?
Thanks,
Shimrit Abraham
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2009 Feb 03
1
plot multiple time series
Hi,
I have a dataframe containing a date object in the first column and numeric
data in two other columns, for a total of three columns. I would like to
plot the 2 numeric data columns against the dates in one window. How do I do
this? It is easy to do if only one data series is to be plotted against a
set of dates, but two or more datasets seems to be harder.
Note: I have daily data where
2009 Feb 17
2
Efficient matrix computations
Hi,
I am looking for two ways to speed up my computations:
1. Is there a function that efficiently computes the 'sandwich product' of
three matrices, say, ZPZ'
2. Is there a function that efficiently computes the determinant of a
positive definite symmetric matrix?
Thanks,
S.A.
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