Displaying 8 results from an estimated 8 matches for "permonik".
2002 Feb 26
2
last day of month values
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Hash: SHA1
I have a stock market trading values time series. What's the best way to
extract the "last day of month" values. I looked at function window() but
doesn't appear suitable for this since it expects regular dates.
Thank you.
lukas
- --
Lukas Kubin
lukas.kubin at permonik.com
phone: 00420603836180
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2002 Feb 26
2
covariance of equal date values
...Both of them contain
the dates' vector and vector of values. But the dates are not the same. It
means some dates of first ts are not in the second respectively. And I
need the covariance of same dates, of course.
Could anyone help me, please?
Thank you.
lukas
- --
Lukas Kubin
lukas.kubin at permonik.com
phone: 00420603836180
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2002 May 04
1
algorithm -- generating combinations
...; x2 x3 and x1 x3.
Which format should be the returned result? A vector? I will need to use
it way like: matrix[, c(1, 2, 3)] for a returned set x1 x2 x3.
I am almost sure all I am looking for has someone already done. I will
appreciate any help.
Thank you.
lukas
- --
Lukas Kubin
lukas.kubin at permonik.com
phone: 00420603836180
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2002 Mar 15
1
creating time series from existing data
...SHA1
Is it possible to create a time series from existing data frame? One
column of that frame contains dates (like "01/01/01") and the second one
the values. The period is non-regular (it is not strictly daily nor
working-days-daily).
Thank you.
lukas
- --
Lukas Kubin
lukas.kubin at permonik.com
phone: 00420603836180
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2002 Apr 02
3
A Few Suggestions to help out newbies
As a true R-Newbie, I thought I would respond to Zed Shaw's ideas. I think they're all good. I've put comments re the ones which would be critical for me
>>>1) An R Cookbook section of the site where people can submit pieces >>>of interesting code that satisfies a need. This would be similar to the
>>>Perl/Python/Java Cookbook texts that O'Reilly
2002 Mar 13
1
How to read in dataframe from file
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I need to read in a dataframe stored in a cvs file. The problem is I don't
know how to tell R the first column (in format like "7-Jan-80") is a
vector of dates.
Could you help me, please?
Thanks.
lukas
- --
Lukas Kubin
lukas.kubin at permonik.com
phone: 00420603836180
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2002 Mar 15
1
predicting financial time series
...ntly I'm using the smooth.spline but are there
any others used in practice?
Do I find the mathematical formulations of R-functions somewhere (I now I
could deduct it from the source code algorithms but ...)? Of the
smooth.spline() for example?
Thank you.
lukas
- --
Lukas Kubin
lukas.kubin at permonik.com
phone: 00420603836180
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2002 Apr 09
1
how to deal with singularities in lm()
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I got the report
Coefficients: (1 not defined because of singularities)
while trying to get my model's coefficients from lm()
What shall I do to avoid it and get the one missing coefficient?
Thank you.
lukas
- --
Lukas Kubin
lukas.kubin at permonik.com
phone: 00420603836180
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