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\begin{equation} df = \frac{(\frac{{s_\bar{n_1}}^2}{n_1} + \frac{{s_\bar{n_2}}^2}{n_2})^2}{\frac{{s_1}^4}{{{n_1}^2}(n_1 - 1)} + \frac{{s_2}^4}{{n_2}^2(n_2 - 1)}} \end{equation}
Pro tip: whenever you encounter such an error from LaTeX, remove or comment out parts of your code until it starts working, then gradually add them back again until you've found the problem.
In this case, it's here:
s_\bar{n_1}
The part after the first _ is more than a single token, so it needs some extra curly braces:
s_{\bar{n_1}}
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So I found out that any variable or constant in swift is a tuple. For example, variable x below is a tuple
var x = 15
and following statement is valid and evaluates to value of x as the first element of tuple
x.0.0.0.0.0.0.0.0.0.0.0 // outputs 15
I'm wondering why the language has been built to accommodate this. Any known (or outworldly) use case?
I don't know can it be the right answer, but it gives some information and shows that it's a known thing. Look this 2 sections:
Special: The 1-Tuple
Bonus Track: Tuples All the Way Down
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I have a string from user input that is in the following format:
"foo\U+FFE2\U+FFB5\U+FFE2\U+FFB5"
When I view this it does not show anything in the browser or terminal, but they are definitely there.
What are they and how do I remove all junk chars like these to end up with just 'foo'?
I know I could just remove these specific ones but there maybe other different ones that I want just the text value from.
Any ideas?
I see the two main variants:
with #split/#join pair:
"fooффф".split('').select{|x|x.ord <= 127}.join
# => "foo"
with #unpack/#pack pair:
"fooффф".unpack('U*').select{|x| x <= 127}.pack('U*')
# => "foo"
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I am trying to write a code inside \code{} in .tex file.
I am eager to write
\code{
cat("\n I want to write like this!")
}
However, latex gives me ERROR message, saying that \n is undefined control sequence.
I also tried \code{$\n$} and \code{\\n}. Neither works.
(I also know that \n works in verbatim environment. But I HAVE TO use \code{})
You can try this..
\textbackslash n
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I have an arbitratry string, something like QKOTRFLARGEBRAAFFALGORITHMMIMISSSTUPIDCROCODOLCONCEALEDKSBABA...
and I need to tell LaTeX to split this string neatly into lines. It is not a word, there should be no '-' when splitting line. Just fit these data into lines, break wherever it suits.
I have successfully used the seqsplit package for that.
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How to hide the page number on first page of a chapter in LaTeX.
\thispagestyle{empty}
You could also use the titlesec package to get tremendous control over each chapter:
% This is done with the titlesec package
\titleformat{\chapter}[display]
{\normalfont\Large\filcenter} % {fmt}
{\thechapter.\ } % {label}
{1pc} % {sep}
{\vspace{-1in}\enlargethispage{-0.5in}\thispagestyle{empty}} % {before}