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Get operating system info
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202
The code below could explain in its own right, how http://thismachine.info/ is able to show wh...
How do I make a matrix from a list of vectors in R?
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124
One option is to use do.call():
> do.call(rbind, a)
[,1] [,2] [,3] [,4] [,5] [,6]
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What is the equivalent of MATLAB's repmat in NumPy
...gives a 3d output array as you would expect - matlab for some reason gives 2d output - but the content is the same).
Matlab:
>> repmat([1;1],[1,1,1])
ans =
1
1
Python:
In [46]: a = np.array([[1],[1]])
In [47]: np.tile(a, [1,1,1])
Out[47]:
array([[[1],
[1]]])
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App Inventor 2开发简单计算器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...就会出现一些莫名其妙的状况，这里要讲解的是一个只有20个按键的简易计算器，实现了加减乘除的简单运算，以及清除、回退、求相反数等，如图2-1所示，更为复杂的运算，如求乘方、方根及三角函数的运算，可以利用开发工...
Is there a way to detect if an image is blurry?
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12 Answers
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Are 2^n and n*2^n in the same time complexity?
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232
You will have to go to the formal definition of the big O (O) in order to answer this question...
Why does 2 mod 4 = 2?
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152
Mod just means you take the remainder after performing the division. Since 4 goes into 2 zero ti...
Dynamically update values of a chartjs chart
... on a line chart: http://jsbin.com/yitep/4/edit
Original Post
As of Nov 2013, there seem to be very few options for updating charts.
There is a good example here (duplicated below) of adding new points to a line chart. Still kind of jumpy but not too bad. However, I think the effect probably...