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Warning message: In `…` : invalid factor level, NA generated
...of 2 variables:
$ Type : Factor w/ 1 level "": NA 1 1
$ Amount: chr "100" "0" "0"
>
> fixed <- data.frame("Type" = character(3), "Amount" = numeric(3),stringsAsFactors=FALSE)
> fixed[1, ] <- c("lunch", 100)
> str(fixed)
'data.frame': 3 obs. of 2 variables:
$ Type : chr ...
SQL Server - stop or break execution of a SQL script
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Coalesce function for PHP?
...sce function (returns the first non-NULL value, example ). PHP, sadly in 2009, does not.
9 Answers
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Not showing placeholder for input type=“date” field
... edited Feb 26 at 14:58
j08691
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answered Dec 3 '13 at 4:53
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np.mean() vs np.average() in Python NumPy?
...eturned: #returned is another optional argument
scl = np.multiply(avg, 0) + scl
return avg, scl
else:
return avg
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Using OpenSSL what does “unable to write 'random state'” mean?
...ilename is known because neither RANDFILE nor HOME is set. (Versions up to 0.9.6 used file ".rnd" in the current directory in this case, but this has changed with 0.9.6a.)
So I would check RANDFILE, HOME, and permissions to write to those places in the filesystem.
If everything seems to be in or...
Bash Templating: How to build configuration files from templates with Bash?
...bash
while read -r line ; do
while [[ "$line" =~ (\$\{[a-zA-Z_][a-zA-Z_0-9]*\}) ]] ; do
LHS=${BASH_REMATCH[1]}
RHS="$(eval echo "\"$LHS\"")"
line=${line//$LHS/$RHS}
done
echo "$line"
done
. Solution that does not hang if RHS references some variable that referen...
Is it possible to reference one CSS rule within another?
...ating them with a comma).
.opacity, .someDiv {
filter:alpha(opacity=60);
-moz-opacity:0.6;
-khtml-opacity: 0.6;
opacity: 0.6;
}
.radius, .someDiv {
border-top-left-radius: 15px;
border-top-right-radius: 5px;
-moz-border-radius-topleft: 10px;
-moz-border-radius-topr...
Android, canvas: How do I clear (delete contents of) a canvas (= bitmaps), living in a surfaceView?
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edited Apr 20 '11 at 12:22
answered Apr 20 '11 at 12:01
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Location Manager Error : (KCLErrorDomain error 0)
...ion.
– Undistraction
Jun 18 '13 at 10:18
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If you are wondering where is SCHEME follow this link ...