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Convert data.frame column format from character to factor
...fully stick back into into the dataframe, df
Another strategy would be to convert only those columns where the number of unique items is less than some criterion, let's say fewer than the log of the number of rows as an example:
cols.to.factor <- sapply( df, function(col) length(unique(col)) &l...
Convert number strings with commas in pandas DataFrame to float
...ontains numbers as strings with commas for the thousands marker. I need to convert them to floats.
3 Answers
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Convert string to number and add one
I want to turn the value I get from the id into a number and add one to it then pass the new value into the dosomething() function to use. When I tried this and the value is one I get back 11 not 2.
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Converting timestamp to time ago in PHP e.g 1 day ago, 2 days ago…
I am trying to convert a timestamp of the format 2009-09-12 20:57:19 and turn it into something like 3 minutes ago with PHP.
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How to run a program without an operating system?
...s:
Make sure to use the right pins, or else you can burn your UART to USB converter, I've done it twice already by short circuiting ground and 5V...
Finally connect to the serial from the host with:
screen /dev/ttyUSB0 115200
For the Raspberry Pi, we use a Micro SD card instead of an USB stick to ...
How to convert the ^M linebreak to 'normal' linebreak in a file opened in vim?
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:e ++ff=dos followed by :set ff=unix will convert the endings to a sane format.
– Mateen Ulhaq
Mar 2 '18 at 2:22
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How do I write a bash script to restart a process if it dies?
... do this.
ps is very unportable. While you find it on almost every UNIX system; its arguments vary greatly if you want non-standard output. And standard output is ONLY for human consumption, not for scripted parsing!
Parsing ps leads to a LOT of false positives. Take the ps aux | grep PID examp...
How is the Linux kernel tested ?
...of the BKL over the years. The other thing to consider is testing many sub systems on many different architectures, which is only practically feasible with the kind of community abuse, err testing, that Linux receives.
– Tim Post♦
Jul 5 '10 at 15:52
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node.js fs.readdir recursive directory search
...t something like C:\\some\\foo\\path on Windows and /some/foo/path on Unix systems
– Leiko
Dec 22 '13 at 20:00
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How to select date from datetime column?
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Interesting, if MySql implementation automatically converts DATE(datetime) to BETWEEN AND behine the scenes we get short statement and cool performance. Why not? Why they did not do this? :)
– Cherry
Dec 30 '16 at 5:04
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