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What is in your Mathematica tool bag? [closed]
... processing.
As an example of its utility, I've been working with Wannier90 which outputs the spatially dependent Hamiltonian into a file where each line is a different element in the matrix, as follows
rx ry rz i j Re[Hij] Im[Hij]
To turn that list into a set of matrices, I gathered up all subl...
Generate colors between red and green for a power meter?
...
203
This should work - just linearly scale the red and green values. Assuming your max red/green/bl...
Is this a “good enough” random algorithm; why isn't it used if it's faster?
... QuickRandom qr = new QuickRandom();
int[] frequencies = new int[10];
for (int i = 0; i < 100000; i++) {
frequencies[(int) (qr.random() * 10)]++;
}
printDistribution("QR", frequencies);
frequencies = new int[10];
for (int i = 0; i <...
Converting numpy dtypes to native python types
...py as np
# for example, numpy.float32 -> python float
val = np.float32(0)
pyval = val.item()
print(type(pyval)) # <class 'float'>
# and similar...
type(np.float64(0).item()) # <class 'float'>
type(np.uint32(0).item()) # <class 'long'>
type(np.int16(0).item()) # <...
What Process is using all of my disk IO
...
You're looking for iotop (assuming you've got kernel >2.6.20 and Python 2.5). Failing that, you're looking into hooking into the filesystem. I recommend the former.
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improve...
How to scale down a range of numbers with a known min and max value
...l. I want the height and width of each ellipse to be in a range of say 1-30. I have methods that find the minimum and maximum values from my data set, but I won't have the min and max until runtime. Is there an easy way to do this?
...
How do you detect where two line segments intersect? [closed]
...th s, getting
(p + t r) × s = (q + u s) × s
And since s × s = 0, this means
t (r × s) = (q − p) × s
And therefore, solving for t:
t = (q − p) × s / (r × s)
In the same way, we can solve for u:
(p + t r) × r = (q + u s) × r
u (s × r) = (p − q) × r
...
Easy pretty printing of floats in python?
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102
As noone has added it, it should be noted that going forward from Python 2.6+ the recommended w...
Determine the data types of a data frame's columns
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220
Your best bet to start is to use ?str(). To explore some examples, let's make some data:
set...
initialize a numpy array
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answered Dec 26 '10 at 20:56
KatrielKatriel
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