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Adding a column to a data.frame
... c(1:4, 1:7, 1:5), h_freq = runif(16), h_freqsq = runif(16))
# find where one appears and
from <- which(your.df$no == 1)
to <- c((from-1)[-1], nrow(your.df)) # up to which point the sequence runs
# generate a sequence (len) and based on its length, repeat a consecutive number len times
get....
open() in Python does not create a file if it doesn't exist
...pos [, (0|1|2)])
pos .. position of the r/w pointer
[] .. optionally
() .. one of ->
0 .. absolute position
1 .. relative position to current
2 .. relative position from end
Only "rwab+" characters are allowed; there must be exactly one of "rwa" - see Stack Overflow question Python fi...
Simulating tremor (from e.g. Parkinson's Disease) with the mouse on a webpage?
...shop that simulates different disabilities/impairments to people. This is done via a website created especially for this presentation.
...
Do you get charged for a 'stopped' instance on EC2? [closed]
...ave linked: Each time you start a stopped instance we charge a minimum of one minute for usage. After one minute, we charge only for the seconds you use. For example, if you run an instance for 20 seconds and then stop it, we charge for a full one minute. If you run an instance for 3 minutes and 40...
Force R not to use exponential notation (e.g. e+10)?
...e applied when deciding to print
numeric values in fixed or exponential notation. Positive
values bias towards fixed and negative towards scientific
notation: fixed notation will be preferred unless it is more
than ‘scipen’ digits wider.
Example...
Best practices/guidance for maintaining assembly version numbers
...ou have already said in your question it is clear that you have understood one important point, the assembly version numbers are not synonymous with the product version. One is technically driven, and the other is driven by the business.
The following assumes that you use some form of source contro...
How to use Boost in Visual Studio 2010
...equested, and include information on compiling in the various optional components which requires external libraries.
If you are using headers only libraries, then all you need to do is to unarchive the boost download and set up the environment variables. The instruction below set the environment va...
Generate random password string with requirements in javascript
...ring only accepts a base up to and including 36. This answer is meant as a one-liner for a non-cryptographic random string. If you want to have capitals as well, use Math.random (or crypto.getRandomValues if available) and map the result to a-z, A-Z, 0-9. For instance using saaj's answer below.
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How to compare binary files to check if they are the same?
...test yet but I think that it will stop at the first difference if there is one.
– Victor Yarema
Nov 22 '16 at 5:21
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Strengths of Shell Scripting compared to Python [closed]
...l POSIX-compliant systems, however that language is a much more restricted one than that implemented by bash.
– intuited
May 12 '10 at 1:16
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