User Lukas

11 votes

2 answers

1k views

Non-commutative algebra (NCAlgebra): How to properly SetCommutingOperators

asked Dec 18, 2015 at 12:27

11 votes

1 answer

311 views

Why FoldList 5 times faster than Apply for matrix multiplication? [duplicate]

matrix performance-tuning

asked Apr 8, 2016 at 7:50

10 votes

5 answers

468 views

Use different markers/colors in logarithmic plot depending on sign

plotting logarithmic-scale

asked Jun 16, 2015 at 21:38

9 votes

6 answers

502 views

How to generate this structure of a list without `While` and the like?

function-construction coding-style

asked Apr 22, 2016 at 11:40

8 votes

0 answers

449 views

How to determine reason for kernel crash? -> Nelder Mead optimisation

mathematical-optimization kernel crash

asked Feb 2, 2015 at 15:16

7 votes

1 answer

619 views

How to stop optimization (e.g. NMinimize) after reaching target value

mathematical-optimization

asked May 7, 2015 at 17:30

7 votes

3 answers

340 views

Make NonlinearModelFit return continuous function

fitting

asked Aug 28, 2015 at 13:37

7 votes

2 answers

490 views

Gray boxes around labels in exported image (PDF, JPEG,...)

plotting graphics export

asked Jun 2, 2016 at 9:13

7 votes

1 answer

649 views

Find numerical solution of (overdetermined) system of differential(-algebraic) equations

differential-equations equation-solving numerical-integration

asked Mar 28, 2017 at 9:43

6 votes

0 answers

238 views

Getting CUDALink (Toolkit 7.5) to work on Linux, Mathematica 10.0.2, GTX750

linux cudalink

asked Feb 12, 2016 at 9:53

6 votes

1 answer

396 views

How to speed up evaluation of expression (multiple variables) to gain speed? Compile?

performance-tuning simplifying-expressions compile

asked Aug 23, 2018 at 9:08

5 votes

4 answers

248 views

Multi-index variable depending on signature of permutation of indices

function-construction symbolic permutation index

asked Apr 1, 2016 at 12:38

5 votes

3 answers

137 views

Create pattern to "redo" Nest for symbolic purposes, e.g. for commutators

pattern-matching symbolic expression-manipulation functional-style

asked Apr 12, 2017 at 15:35

5 votes

2 answers

449 views

Automatically detect higher slope in numerical data (within a certain range)

fitting data

asked Sep 1, 2015 at 11:23

5 votes

0 answers

160 views

List(Log)Plot with "high" resolution results in various warnings, e.g. BinCounts::step

plotting warning-messages

asked Oct 23, 2015 at 8:30

5 votes

3 answers

655 views

How to be more efficient/faster with this MatrixExp-vector multiplication?

matrix performance-tuning linear-algebra

asked Nov 9, 2015 at 10:44

5 votes

2 answers

828 views

Help at speeding up simplification/nested symbolic integration

calculus-and-analysis performance-tuning symbolic

asked Dec 3, 2014 at 14:13

4 votes

1 answer

329 views

How to transform a list (of sums) into list of summands

list-manipulation replacement

asked Aug 11, 2015 at 2:02

4 votes

2 answers

349 views

Elegant way to partition list to be faster than `ParallelTable` (using `ParallelSubmit`), or some alternative?

list-manipulation performance-tuning parallelization partitions

asked Feb 22, 2016 at 17:09

3 votes

1 answer

87 views

How to combine those rules into one? Does something like default values exist for patterns?

pattern-matching symbolic expression-manipulation

asked Apr 11, 2017 at 22:39

3 votes

1 answer

269 views

Seemingly wrong eigenvectors for numerical matrix whose elements differ in scale by orders of magnitude

matrix numerics linear-algebra eigenvalues

asked Feb 21, 2017 at 14:57

3 votes

0 answers

99 views

Does NDSolve automatically simplify the system of equations for Hermitian matices?

differential-equations linear-algebra

asked Oct 6, 2015 at 14:29

3 votes

1 answer

198 views

Reshape output of TeXForm into one-line string

string-manipulation latex

asked Jul 17, 2017 at 10:19

3 votes

1 answer

285 views

Debug numerical error inside CompiledFunction

performance-tuning warning-messages compile

asked Mar 20, 2018 at 9:39

3 votes

2 answers

125 views

Avoid hardcoding of variables for Compile by using a list

performance-tuning compile

asked Mar 28, 2018 at 16:04

2 votes

0 answers

95 views

NIntegrate a vector function without using Indexed and NDSolveValue?

numerical-integration

asked May 30, 2018 at 8:31

2 votes

1 answer

427 views

How to properly apply NumericQ or s.th. similar here? - NDSolve inside NMaximize

numerics mathematical-optimization expression-test

asked Jan 27, 2015 at 12:31

2 votes

2 answers

292 views

How to treat indexed variables as Reals? Can they be symbolized?

calculus-and-analysis symbolic assumptions

asked Nov 22, 2016 at 11:02

2 votes

1 answer

87 views

Use pattern as Assumptions: How to properly extend working pattern? [duplicate]

simplifying-expressions pattern-matching symbolic

asked Apr 26, 2017 at 14:12

1 vote

1 answer

94 views

Customized `ParallelTable` - Automate `ParallelSubmit` - Possibly an issue with `HoldAllComplete` attribute

performance-tuning parallelization hold

asked Feb 24, 2016 at 13:45

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44 Questions

Non-commutative algebra (NCAlgebra): How to properly SetCommutingOperators

Why FoldList 5 times faster than Apply for matrix multiplication? [duplicate]

Use different markers/colors in logarithmic plot depending on sign

How to generate this structure of a list without `While` and the like?

How to determine reason for kernel crash? -> Nelder Mead optimisation

How to stop optimization (e.g. NMinimize) after reaching target value

Make NonlinearModelFit return continuous function

Gray boxes around labels in exported image (PDF, JPEG,...)

Find numerical solution of (overdetermined) system of differential(-algebraic) equations

Getting CUDALink (Toolkit 7.5) to work on Linux, Mathematica 10.0.2, GTX750

How to speed up evaluation of expression (multiple variables) to gain speed? Compile?

Multi-index variable depending on signature of permutation of indices

Create pattern to "redo" Nest for symbolic purposes, e.g. for commutators

Automatically detect higher slope in numerical data (within a certain range)

List(Log)Plot with "high" resolution results in various warnings, e.g. BinCounts::step

How to be more efficient/faster with this MatrixExp-vector multiplication?

Help at speeding up simplification/nested symbolic integration

How to transform a list (of sums) into list of summands

Elegant way to partition list to be faster than `ParallelTable` (using `ParallelSubmit`), or some alternative?

How to combine those rules into one? Does something like default values exist for patterns?

Seemingly wrong eigenvectors for numerical matrix whose elements differ in scale by orders of magnitude

Does NDSolve automatically simplify the system of equations for Hermitian matices?

Reshape output of TeXForm into one-line string

Debug numerical error inside CompiledFunction

Avoid hardcoding of variables for Compile by using a list

NIntegrate a vector function without using Indexed and NDSolveValue?

How to properly apply NumericQ or s.th. similar here? - NDSolve inside NMaximize

How to treat indexed variables as Reals? Can they be symbolized?

Use pattern as Assumptions: How to properly extend working pattern? [duplicate]

Customized `ParallelTable` - Automate `ParallelSubmit` - Possibly an issue with `HoldAllComplete` attribute