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How to iterate over argum>me m>nts in a Bash script
...hat I'd like to make a shell/bash script of. I can write it in terms of $1 easily:
8 Answers
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How to succinctly write a formula with many variables from a data fram>me m>?
...in a formula to m>me m>an all the variables, it is the . identifier.
y <- c(1,4,6)
d <- data.fram>me m>(y = y, x1 = c(4,-1,3), x2 = c(3,9,8), x3 = c(4,-4,-2))
mod <- lm(y ~ ., data = d)
You can also do things like this, to use all variables but one (in this case x3 is excluded):
mod <- lm(y ~ ...
Inserting a PDF file in LaTeX
...myfile.pdf}
To include just the first page of a PDF:
\includepdf[pages={1}]{myfile.pdf}
Run texdoc pdfpages in a shell to see the complete manual for pdfpages.
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pyplot scatter plot marker size
...d the output they produce.
# doubling the width of markers
x = [0,2,4,6,8,10]
y = [0]*len(x)
s = [20*4**n for n in range(len(x))]
plt.scatter(x,y,s=s)
plt.show()
gives
Notice how the size increases very quickly. If instead we have
# doubling the area of markers
x = [0,2,4,6,8,10]
y = [0]*len(...
How do you add an array to another array in Ruby and not end up with a multi-dim>me m>nsional result?
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17 Answers
17
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How to round up a number in Javascript?
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316
/**
* @param num The number to round
* @param precision The number of decimal places to prese...
C语言面试那些事儿──一道指针与数组问题 - c++1y / stl - 清泛IT社区，为创新赋能！
...下代码：
int main(int argc, char** argv)
{
    int a[5] = {1,2,3,4,5};
    int* ptr = (int*)(&a + 1);
    printf("%d,%d\n", *(a+1), *(ptr-1));
    return 0;
}复制代码这道题在很多所谓经典C语言面试题里是常见的不能再...
Data structure: insert, remove, contains, get random elem>me m>nt, all at O(1)
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14 Answers
14
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Can I use multiple versions of jQuery on the sam>me m> page?
... it's doable due to jQuery's noconflict mode. http://blog.nemikor.com/2009/10/03/using-multiple-versions-of-jquery/
<!-- load jQuery 1.1.3 -->
<script type="text/javascript" src="http://example.com/jquery-1.1.3.js"></script>
<script type="text/javascript">
var jQuery_1_1_3 =...