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 Yearling
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Feb
2
comment Is there a name for subtracting a set of values from their max?
Thanks - is there any specific reason behind this term? Is it used elsewhere?
Feb
2
comment Use $\log(x)$ to calculate $\log(x+1)$
@Winther using python/numpy, which has builtin $log()$, $log1p()$ etc.
Feb
2
comment Use $\log(x)$ to calculate $\log(x+1)$
@Winther application - I may need to sum 10^9 such values to calculate a partition function.
Feb
2
comment Use $\log(x)$ to calculate $\log(x+1)$
@BrianTung double precision.
Feb
2
asked Use $\log(x)$ to calculate $\log(x+1)$
Dec
14
comment How to find that $x^2 +y^2=z^2$ describes an infinite cone by simple algebra manipulation and change of coordinates?
Yes, this is how I see it. In the original equation the radius increases as $z$ increases.
Dec
14
comment How to find that $x^2 +y^2=z^2$ describes an infinite cone by simple algebra manipulation and change of coordinates?
Are you just looking for an intuitive explanation? Can you see why $x^2 +y^2 = r^2$ is a circle with radius $r$? The cone follows from there.
Dec
10
comment If we randomly select 25 integers between 1 and 100, how many consecutive integers should we expect?
+1 for the most useful answer. I think what OP really wants to know is: given that I see $x$ pairs, what is the probability of this happening by chance? (either this or a p-value version, i.e. $x$ or more).
Sep
21
awarded  Yearling
Jun
5
awarded  Nice Question
Jun
4
comment Is there a term for the ratio of a function and its derivative?
Thanks - this is actually how I got this ratio in the first place.
Jun
4
accepted Is there a term for the ratio of a function and its derivative?
Jun
4
asked Is there a term for the ratio of a function and its derivative?
Jan
29
accepted Spectral gap vs. algebraic connectivity
Jan
29
comment Spectral gap vs. algebraic connectivity
Great - this can be achieved easily with Sinkhorn-Knopp balancing.
Jan
29
comment Spectral gap vs. algebraic connectivity
Thanks. Do you know if something similar holds in an undirected weighted graphs when the sum of vertex weights of each node is equal?
Jan
28
asked Spectral gap vs. algebraic connectivity
Oct
17
comment Finding unknown matrices in a set of simultaneous matrix equations
I think $X$ should be $n$x$p$
Oct
12
awarded  Nice Answer
Oct
11
revised Why get the sum of squares instead of the sum of absolute values?
added 3 characters in body