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2h
comment Real Numbers in the Wolfram Language
Also, in many programming languages (statically typed ones) the type is bound to variables, so saying that x is real means that x can hold values from $\mathbb{R}$, which does make sense. k is integer so we can't assign 1.5 to k. In Mathematica types just describe values, not variables, so it makes less sense.
2h
comment Real Numbers in the Wolfram Language
Yes, Real just means "real (no imaginary parts) floating point datatype", and it's a programming concept, not a mathematical one. Yes, it is a bit confusing, since Mathematica is a computer algebra system. (There were questions on this site stemming from this confusion.) But it's not uncommon among programming languages, e.g. Pascal also uses real as the name for its floating point type. In a programming context it makes more sense as it refers to the fact that this datatype can represent many real numbers, not just integers. The term is applied to the type, not individual numbers.
2h
answered Listable vs Parallel
2h
comment Real Numbers in the Wolfram Language
The domain Reals does indeed represent the set of all real numbers. This is completely separate from the Real datatype, which as you said is just a floating point type. 1 \[Element] Reals gives True.
23h
comment version 5 & OS X 10.9
Most likely Mathematica 5 is compiled for PowerPC processors. Current Macs use Intel processors and OS X 10.9 doesn't support PowerPC emulation. So the likely answer is no, it won't be possible to do this. (If you have the Windows version of Mathematica 5, however, it should still work on current versions of Windows.)
1d
comment Normalize centrality measures
So why don't you just divide by the Maximum then?
1d
comment Normalize centrality measures
What do you mean by "normalize" here? Can you define it?
2d
answered Ordinary Least Squares (OLS) with RLink
2d
revised Ordinary Least Squares (OLS) with RLink
added 59 characters in body
Dec
19
comment Package function not evaluating
@KristiansKuhta Have you seen the tutorial on patterns? If you are still unsure about why your function behaves the way it does, it's a good idea to stop for a moment and read through it.
Dec
19
answered Package function not evaluating
Dec
18
comment Function Expectation
Please format the post for readability. Since this is already your 4th question, it is expected that you familiarize yourself with the formatting system.
Dec
18
comment Interpolation using 3 input function
This question appears to be off-topic because it is not about Mathematica
Dec
18
answered Is it possible to change the MinPrecision in command “Compile”?
Dec
18
comment Mathematica can't export $\sqrt{}$
Did you report it?
Dec
18
comment Froze Mathematica and now it's buggy
If the problem only appears when using the notebook it may be because of some dynamic constructs in the notebook. Try turning off Evaluation -> Dyanmic Updating Enabled temporarily.
Dec
18
revised Froze Mathematica and now it's buggy
edited tags
Dec
17
comment Why is C-compiled (but not WVM-compiled) code so slow in Manipulate?
Very likely because you're passing symbolic arguments to the function (a x). Try Evaluated -> False in Plot.
Dec
17
comment How to close external app from Mathematica?
Take a look here: reference.wolfram.com/language/guide/…
Dec
17
comment How to reflect the entries of a square matrix about its anti-diagonal?
Try Transpose@Reverse[m, {1, 2}].