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Summarizing multiple columns with dplyr? [duplicate]
...library(purrrlyr)
library(data.table)
library(bench)
set.seed(123)
n <- 10000
df <- data.frame(
a = sample(1:5, n, replace = TRUE),
b = sample(1:5, n, replace = TRUE),
c = sample(1:5, n, replace = TRUE),
d = sample(1:5, n, replace = TRUE),
grp = sample(1:3, n, replace = TRUE)
)
d...
Auto expand a textarea using jQuery
...
answered Jun 1 '10 at 8:31
ReigelReigel
60.2k2020 gold badges113113 silver badges132132 bronze badges
...
How to handle multiple heterogeneous inputs with Logstash?
...aaa" in [tags] {
elasticsearch {
hosts => ["192.168.100.211:9200"]
index => "aaa"
document_type => "aaa-%{+YYYY.MM.dd}"
}
}
if "bbb" in [tags] {
elasticsearch {
hosts => ["192.168.100.211:9200"]
...
How to remove leading zeros from alphanumeric text?
... {
"01234", // "[1234]"
"0001234a", // "[1234a]"
"101234", // "[101234]"
"000002829839", // "[2829839]"
"0", // "[0]"
"0000000", // "[0]"
"0000009", // "[9]"
"000000z", // "[z]"
"000000.z", // "[.z]"
};
for (...
How do I check if a string is a number (float)?
...apping a try/catch. Ugh
– Basic
Mar 10 '14 at 11:22
6
...
Why java.lang.Object is not abstract? [duplicate]
...
|
edited Jan 22 '10 at 21:26
answered Jan 22 '10 at 15:30
...
How to find the statistical mode?
...}
On my dinky little machine, that can generate & find the mode of a 10M-integer vector in about half a second.
If your data set might have multiple modes, the above solution takes the same approach as which.max, and returns the first-appearing value of the set of modes. To return all modes,...
Check if a given Type is an Enum
...owLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\...
How to set selected item of Spinner by value, not by position?
...
answered Nov 19 '10 at 18:18
MerrillMerrill
6,62822 gold badges1212 silver badges33 bronze badges
...
Useful GCC flags for C
...
answered Jul 31 '10 at 1:35
cafcaf
210k3434 gold badges276276 silver badges423423 bronze badges
...