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\$\begingroup\$ -1:x+1 will save you a byte, but 0:45 will save you three and cover the required range \$\endgroup\$

MickyT
– MickyT

2017-06-14 20:39:53 +00:00
Commented Jun 14, 2017 at 20:39
\$\begingroup\$ @MickyT Oh, I must've overlooked the required range specification. Thanks :) \$\endgroup\$

JAD
– JAD

2017-06-14 20:42:37 +00:00
Commented Jun 14, 2017 at 20:42
\$\begingroup\$ An alternative approach, only 36 bytes: pryr::f(any(!(5*n^2+c(-4,4))^.5%%1)). \$\endgroup\$

rturnbull
– rturnbull

2017-06-16 08:12:26 +00:00
Commented Jun 16, 2017 at 8:12
\$\begingroup\$ I got it down to 32 bytes, see here. \$\endgroup\$

rturnbull
– rturnbull

2017-06-16 09:58:29 +00:00
Commented Jun 16, 2017 at 9:58
\$\begingroup\$ I'm not so familiar with code golf rules -- does allowing non-base packages make sense? I could write arbitrary R code into a package, install it, and run it the same way you have run the function from pryr. \$\endgroup\$

mb7744
– mb7744

2017-06-16 12:58:07 +00:00
Commented Jun 16, 2017 at 12:58

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Correct minor typos or mistakes
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create code fences with backticks ` or tildes ~
```
like so
```
add language identifier to highlight code
```python
def function(foo):
print(foo)
```
put returns between paragraphs
for linebreak add 2 spaces at end
_italic_ or **bold**
indent code by 4 spaces
backtick escapes `like _so_`
quote by placing > at start of line
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