Berk U.

Cambridge, MA

berkustun.com

Age: 27

I am a Ph.D. student in the Electrical Engineering and Computer Science Department at MIT. I am interested in developing new methods for data-driven decision-making and using them to solve problems in areas such as climate change, crime prediction, healthcare and revenue management.

1d
awarded Popular Question
Jan
26
awarded Popular Question
Jan
17
awarded Popular Question
Jan
8
awarded Yearling
Jan
5
comment Summarizing an arbitrary # of columns in a data frame using my own function in R
Quick question: is a data.table solution faster than dplyr? I've seen it mentioned several times in these forums.
Jan
5
comment Summarizing an arbitrary # of columns in a data frame using my own function in R
Yes! This is very close to what I was looking for. The only thing is that this automatically appends the summarized field names with an underscore + the function name. Is there some way to make it use a "." instead of a "_" (e.g. value_1.min instead of value_1_min)?
Jan
4
asked Summarizing an arbitrary # of columns in a data frame using my own function in R
Dec
22
revised How to change color/shape/size for a subset of data after plotting in ggplot2
added 237 characters in body; edited title
Dec
21
asked How to change color/shape/size for a subset of data after plotting in ggplot2
Dec
20
accepted How to set the default value of a variable as an array?
Dec
20
comment How to set the default value of a variable as an array?
Thanks! It works great!
Dec
20
comment Robust function to set the default value of scalar / array variables
This looks promising. Unfortunately, I actually get a 'mapfile: command not found' error (running GNU bash, version 3.2.53(1)-release (x86_64-apple-darwin14)).
Dec
20
comment Capture job id of a job submitted by qsub
Could you explain what is going on here? Wouldn't the $(qsub job.sh) resubmit a job to the scheduler?
Dec
18
asked Robust function to set the default value of scalar / array variables
Dec
18
revised How to set the default value of a variable as an array?
added 1 character in body
Dec
18
revised How to set the default value of a variable as an array?
added 1 character in body
Dec
18
asked How to set the default value of a variable as an array?
Dec
18
comment Assigning default values to shell variables with a single command in bash
What is the difference between :- and := ?
Dec
15
awarded Caucus
Dec
12
comment create a comma separated list containing the names of all variables starting with a prefix
Thanks! Both work solutions great. I added an extra line s="${s%?}" in order to remove the last ',' at the end of the string.
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