Thanks Andrew. it works well. --- Kai
On Wednesday, July 14, 2021, 05:22:01 PM PDT, Bert Gunter
wrote:
Actually fun( param != something..) is syntactically incorrect in the first
place for any function!
ls sees "pat != whatever" as the "name" argument of ls() and can't make any
Actually fun( param != something..) is syntactically incorrect in the first
place for any function!
ls sees "pat != whatever" as the "name" argument of ls() and can't make
any sense of it, of course.
Bert Gunter
"The trouble with having an open mind is that people keep coming along and
Hello,
First, `ls` does not support `!=` for pattern, but it's actually throwing a
different error. For `rm`, the objects provided into `...` are substituted
(not evaluated), so you should really do something like
rm(list = ls(pattern = ...))
As for all except "con", "DB2", and "ora", I would
Hello List,
I have many data frames in environment. I need to keep 3 data frames only, con
DB2 and ora.
I write the script to do this.
rm(ls(pattern != c("(con|DB2|ora)")))
but it give me an error message:
Error in rm(ls(pattern != c("(con|DB2|ora)"))) :
... must contain names or
On 2021-07-14 19:43, Sorkin, John wrote:
Gentlemen,
At the risk of beating a dead horse, but in he spirit of learning
more about R, aren't the two expressions functionally the same? One
drops values where weight is zero. The other (in the case where we
and infinity * 0, something one would
Gentlemen,
At the risk of beating a dead horse, but in he spirit of learning more about R,
aren't the two expressions functionally the same? One drops values where weight
is zero. The other (in the case where we and infinity * 0, something one would
not expect to see in data) also drops data
Hello Rui,
it's very helpful.
Thank you,
Kai
On Wednesday, July 14, 2021, 10:07:57 AM PDT, Rui Barradas
wrote:
Hello,
Just before for(j in 1:nrow(ora)) include the following code line (I
have removed the underscore):
sdif <- vector("list", length = nrow(ora))
In the loop:
Hello,
Just before for(j in 1:nrow(ora)) include the following code line (I
have removed the underscore):
sdif <- vector("list", length = nrow(ora))
In the loop:
sdif[[j]] <- sqldf(etc)
Also, once again, why noquote? It's better to form file names with
file.path:
rdcsv <-
Hello List,
I wrote a script below to compare the difference of data frames structure (and
will do something else). First of all I save the file list in a data frame ora,
then I use for loop to 1. load the data from two resource, 2. generate data
structure into two data frames, 3.do the
Den 2021-07-14 kl. 13:16, skrev Duncan Murdoch:
On 14/07/2021 6:00 a.m., Göran Broström wrote:
I wonder about the last sentence in the Details section of the
documentation of 'weighted.mean':
"However, zero weights _are_ handled specially and the corresponding ‘x’
values are omitted from
On 14/07/2021 6:00 a.m., Göran Broström wrote:
I wonder about the last sentence in the Details section of the
documentation of 'weighted.mean':
"However, zero weights _are_ handled specially and the corresponding ‘x’
values are omitted from the sum."
The return value of weighted.mean.default
I wonder about the last sentence in the Details section of the
documentation of 'weighted.mean':
"However, zero weights _are_ handled specially and the corresponding ‘x’
values are omitted from the sum."
The return value of weighted.mean.default is
sum((x * w)[w != 0])/sum(w)
and indeed,
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