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Transpose a data frame
...t;- as.data.frame(t(df.aree[,-1]))
colnames(df.aree) <- n
df.aree$myfactor <- factor(row.names(df.aree))
str(df.aree) # Check the column types
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Numpy first occurrence of value greater than existing value
...True ("In case of multiple occurrences of the maximum values, the indices corresponding to the first occurrence are returned.") and doesn't save another list.
In [2]: N = 10000
In [3]: aa = np.arange(-N,N)
In [4]: timeit np.argmax(aa>N/2)
100000 loops, best of 3: 52.3 us per loop
In [5]: time...
git ignore vim temporary files
What is the correct way to make git ignore temporary files produced by vim in all directories (either globally across the system or locally for a single project)?
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How to use my view helpers in my ActionMailer views?
... use the methods I defined in app/helpers/annotations_helper.rb in my ReportMailer views ( app/views/report_mailer/usage_report.text.html.erb ). How do I do this?
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Suppressing deprecated warnings in Xcode
With all the SDKs floating around, it's handy to be able to build for multiple SDKs and platforms. However, bouncing from 3.2 to 3.0 and even occasionally 2.x, I frequently get deprecated warnings involving methods that have changed or been superseded:
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Is it OK to use Gson instance as a static field in a model bean (reuse)?
...e Gson instances? Do you instantiate one every time you need to serialize? Or use a threadlocal pool?
– Dilum Ranatunga
Oct 29 '13 at 19:19
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How can I use Server.MapPath() from global.asax?
I need to use Server.MapPath() to combine some files path that I store in the web.config .
4 Answers
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When to use margin vs padding in CSS [closed]
When writing CSS, is there a particular rule or guideline that should be used in deciding when to use margin and when to use padding ?
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How can I make PHP display the error instead of giving me 500 Internal Server Error [duplicate]
This has never happened before. Usually it displays the error, but now it just gives me a 500 internal server error. Of course before, when it displayed the error, it was different servers. Now I'm on a new server (I have full root, so if I need to configure it somewhere in the php.ini, I can.) Or p...
Count number of occurences for each unique value
...= rep(c(1,2, 2, 2), 25)
table(dummyData)
# dummyData
# 1 2
# 25 75
## or another presentation of the same data
as.data.frame(table(dummyData))
# dummyData Freq
# 1 1 25
# 2 2 75
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