8.6 November 26, 2013
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Top new questions this week:
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[Is Mathematica an Implementation of the Wolfram
Language?]\url{http://mathematica.stackexchange.com/questions/37557/is-math
ematica-an-implementation-of-the-wolfram-language}
I am trying to figure out what the announcement of the Wolfram Language
means for Mathematica.
Is Mathematica an implementation of the Wolfram Language, or is it
something else?
- asked by Eric Brown (21 votes)
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[How to plot a certain surface? What is its parametric
equation?]\url{http://mathematica.stackexchange.com/questions/37698/how-to-
plot-a-certain-surface-what-is-its-parametric-equation}
The surface show below is very beautiful; however, I don't know its
function either as an implicit function or in parametric form.
Anyone have an idea about it and how to draw it with Mathematica?
- asked by LCFactorization (14 votes), answered by kirma (35 votes)
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[CompiledFunction returns machine numbers smaller than
$MinMachineNumber]\url{http://mathematica.stackexchange.com/questions/37764
/compiledfunction-returns-machine-numbers-smaller-than-minmachinenumber>
)
When thinking on the workaround for this LogLogPlot bug suggested by
halirutan I noticed that CompiledFunction actually can return machine
numbers smaller than $MinMachineNumber. Consider:
f = ...
- asked by Alexey Popkov (13 votes), answered by ybeltukov (12 votes)
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[Laplace transform of $\frac{1-\cos
(t)}{t}$]\url{http://mathematica.stackexchange.com/questions/37480/laplace-
transform-of-frac1-cos-tt}
In the documentation, it states that
The Laplace transform of a function $f(t)$ is defined to be
$\int_0^{\infty } f(t) e^{-s t} \, \mathrm{d}t$.
But why can Mathematica not get the Laplace ...
- asked by xslittlegrass (13 votes), answered by Vladimir Reshetnikov
(17 votes)
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[Why is multidimensional Reverse
slow?]\url{http://mathematica.stackexchange.com/questions/37777/why-is-mult
idimensional-reverse-slow}
I have found that multidimensional Reverse is ~10 times slower than
exact -1 ;; 1 ;; -1:
n = 1000;
mat = RandomReal[1, {n, n}];
mat2 = Reverse[mat, 2]; // AbsoluteTiming
mat3 = mat[[All, -1 ;; 1 ;; ...
- asked by ybeltukov (12 votes), answered by Mr.Wizard (3 votes)
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[How can I remove the singleton dimensions of an
array?]\url{http://mathematica.stackexchange.com/questions/37656/how-can-i-
remove-the-singleton-dimensions-of-an-array}
If I have an array A, for which Dimensions[A] is {9, 9, 1, 1, 3, 4}, how
can I convert A' into an array with dimensions {9, 9, 3, 4}?
I think there is a built-in function for this, but I can't ...
- asked by LCFactorization (11 votes), answered by Simon Woods (10
votes)
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[Concatenation of lists in a Fibonacci-like
pattern]\url{http://mathematica.stackexchange.com/questions/37705/concatena
tion-of-lists-in-a-fibonacci-like-pattern}
I am trying to create a List of elements that follow the general
pattern:
$$X_{n+1} = X_n X_{n-1}$$
where the operation on the right hand side is concatenation, i.e.,
joining.
I want to achieve the ...
- asked by user106492 (10 votes), answered by Simon Woods (11 votes)
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Greatest hits from previous weeks:
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[Mathematica9 linux version crash, how to fix
it?]\url{http://mathematica.stackexchange.com/questions/17163/mathematica9-
linux-version-crash-how-to-fix-it}
Ubuntu 12.04 x86_64 kernel 3.2.0-35-generic
Mathematica 9 linux version (x86_64) crashes with errors:
X Error of failed request: BadGC (invalid GC parameter)
Major opcode of failed request: ...
- asked by goodluck (9 votes), answered by goodluck (13 votes)
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[How do I save a variable or function definition to a
file?]\url{http://mathematica.stackexchange.com/questions/1959/how-do-i-sav
e-a-variable-or-function-definition-to-a-file}
Is it possible to save a function which was created via Interpolation of
some data in such a way that I can use this function in a new
Mathematica session without repeated interpolation of the data?
...
- asked by partial81 (27 votes), answered by acl (24 votes)
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Can you answer these?
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[Plotting basin
boundary]\url{http://mathematica.stackexchange.com/questions/37611/plotting
-basin-boundary}
How to plot the basin boundary in Mathematica?
I have been trying to do this using the system
y''[t] == -R y'[t] + (( Y[1] - y[t])/(Sqrt[(X[1] - x[t])^2 + (Y[1] -
y[t])^2 + d^2])^3
...
- asked by HQH (1 vote)
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[How do I use Greek characters in the WindowTitle option of
CreateWindow?]\url{http://mathematica.stackexchange.com/questions/37635/how
-do-i-use-greek-characters-in-the-windowtitle-option-of-createwindow}
I am trying to write some exercises in Greek using CreateWindow. My
problem is with using Greek characters in the option WindowTitle. For
example, with
CreateWindow[DocumentNotebook[{a}, WindowTitle ...
- asked by kornaros (2 votes)
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[Need help fixing fit, eliminating the error of property values assuming
unconstrained model, and correcting script for an implicit
function]\url{http://mathematica.stackexchange.com/questions/37570/need-hel
p-fixing-fit-eliminating-the-error-of-property-values-assuming-unconstr>
)
I fit some data with FindFit and NonlinearModelFit as well as obtained
the parameter table and ANOVA table:
data = {{82.5, 5.75}, {75, 5.965}, {68.75, 6}, {63.45, 6.01}, {58.95,
6.03}, {55, 6.04}};
...
- asked by chy (2 votes)