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Summarizing multiple columns with dplyr? [duplicate]
....6 3.00
# 2 2 4.25 2.75 4.0 3.75
# 3 3 3.00 5.00 1.0 2.00
You can also have multiple functions.
df %>% group_by(grp) %>%
summarise_at(.vars = letters[1:2],
.funs = c(Mean="mean", Sd="sd"))
# A tibble: 3 x 5
# grp a_Mean b_Mean a_Sd b_S...
What is the role of the bias in neural networks? [closed]
...twork, like so:
...then the output of the network becomes sig(w0*x + w1*1.0). Here is what the output of the network looks like for various values of w1:
Having a weight of -5 for w1 shifts the curve to the right, which allows us to have a network that outputs 0 when x is 2.
...
What is included in JCenter repository in Gradle?
...
Another example is appengine-api-1.0-sdk: there is v1.9.22 in MavenCentral, but only v1.9.17 in jcenter.
– naXa
Jun 12 '15 at 10:14
9
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Disable XML validation in Eclipse
...r XML header.
So, if I have the following NewFile.xml:
<?xml version="1.0" encoding="UTF-16"?>
<bar foo="foiré" />
And the eclipse encoding is UTF-8:
The encoding of your file, the defined encoding in Eclipse (through Properties->Resource) and the declared encoding in the XML ...
What values should I use for CFBundleVersion and CFBundleShortVersionString?
...you have a well-tested build, ready for submission. It's version number is 1.0.0 and build number is 1.0.0.32. Once you submit your app, you need to update the version as 1.0.1 and build number as 1.0.1.0.
share
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Which maven dependencies to include for spring 3.0?
... following files have been resolved:
[INFO] aopalliance:aopalliance:jar:1.0:compile
[INFO] commons-logging:commons-logging:jar:1.1.1:compile
[INFO] org.springframework:spring-aop:jar:3.1.2.RELEASE:compile
[INFO] org.springframework:spring-asm:jar:3.1.2.RELEASE:compile
[INFO] org.sprin...
How to send an email with Gmail as provider using Python?
...: " + subject,
"To: " + self.email,
"MIME-Version: 1.0",
"Content-Type: text/html"]
headers = "\r\n".join(headers)
self.session.sendmail(
self.email,
self.email,
headers + "\r\n\r\n" + body)
gm = Gmail('Your Ema...
How can I check whether a numpy array is empty or not?
...None).size
1
>>> np.array(None).shape
()
>>> np.prod(())
1.0
Therefore, I use the following to test if a numpy array has elements:
>>> def elements(array):
... return array.ndim and array.size
>>> elements(np.array(None))
0
>>> elements(np.arr...
What to learn for making Java web applications in Java EE 6? [closed]
...l your needs (Servlet 3.0, JSF 2.0, JPA 2.0, EJB 3.1 lite, Bean Validation 1.0, CDI, etc), because these APIs are all more than decent, because there is nothing really wrong in learning them, because this is already a big task, because you have to start somewhere, I'd focus on Java EE 6 only and for...
Remove grid, background color, and top and right borders from ggplot2
...
Neither of these approaches work for me using ggplot2 2.1.0... @wkretzsch's answer was good.
– Nova
Oct 5 '16 at 14:49
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