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Marko


TU Wien

Last seen: circa 2 mesi fa |  Attivo dal 2016

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interested in maths, algorithms and fluid dynamics

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Domanda


model reduction from a database created with xfoil
Hello community, i have created a database with xfoil (2d airfoil panel code with an boundary solver). The database is saved i...

circa 2 mesi fa | 1 risposta | 0

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risposta

Domanda


add / interpolate arrays of different length
Hello community, i have two array's tsol and ysol. Each array has the length of 9; I have also an error estimate array errorEs...

6 mesi fa | 1 risposta | 0

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risposta

Domanda


exact 2D Chebyshev Interpolation
Hello community, with pseudospectral methods it is possible to obtain a high resoltution solution with a small mesh. I added a...

circa un anno fa | 1 risposta | 0

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risposta

Domanda


how to solve a simplified 2D trajectory problem with defined points and derivatives
Hello, how could i solve this. Two Points are given, also the velocity and the direction What is the simplest trajectory whic...

circa un anno fa | 1 risposta | 0

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risposta

Domanda


how can a symbolic derivative be vectorized automatically?
Hello, here is the simplified problem. I have a symblic function with three arguments. And the derivative of f wrt. b syms a...

circa un anno fa | 3 risposte | 0

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risposte

Inviato


isaVisc
provides the viscosity of the ISA model.

oltre un anno fa | 0 download |

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Inviato


Composite Simpson's rule for irregularly spaced data
Composite Simpson's rule for irregularly spaced data based on a parabolic polynomial fit.

oltre un anno fa | 2 download |

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Domanda


find the minimum objective for a given ode as boundary value problem
Hello Community, could you give me hint how to tackle this problem. I have an ode (c has a positive value): dxdt2 = a+b*t - c...

quasi 3 anni fa | 2 risposte | 0

2

risposte

Domanda


eigs with Extended Capabilities
Hello Community, in the documentation of eigs: Extended Capabilities Thread-Based Environment Run code in the background usi...

quasi 3 anni fa | 1 risposta | 0

1

risposta

Domanda


solve efficiently sparse large linear system of equations
Hello Community, i have a large sparse block structured matrix. with this quadratic sparse Matrix L: is there any faster wa...

circa 3 anni fa | 2 risposte | 0

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Risposto
set efficently specific rows in a sparse matrix to 0
here are the benchmark results: ver Var2 ___ _____ 1 2.242 2 NaN 3 0.87 for v...

circa 3 anni fa | 0

Domanda


set efficently specific rows in a sparse matrix to 0
Hello comunity, I have a sparse matrix J and i want to set specific rows to 0. My code's like this: J = sparse(blkdiag(rand(1...

circa 3 anni fa | 2 risposte | 0

2

risposte

Domanda


function interpolation and root finding
Hello community, i have 37 points in in the interval [-.5 .5]. and i'm looking for a minimum. I have written a script which use...

oltre 3 anni fa | 1 risposta | 0

1

risposta

Domanda


testing SVD Performance on M1
Hello Community, here is a script for testing the M1 performance on solving a SVD Problem. (Parallel Computing Toolbox is requi...

oltre 3 anni fa | 0 risposte | 0

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risposte

Domanda


vectorize a for loop
Hello Community, i need ur help, to speed up a routine. i have n points in space and i need the distances between all points. ...

oltre 3 anni fa | 1 risposta | 0

1

risposta

Domanda


Solve large linear equations with backslash operator. Why is sparse matrix solved slower than the full matrix?
Hello Community and Staff, maybe somebody could explain to me why sparse matrix operation for a not so well condidioned matrix ...

oltre 3 anni fa | 1 risposta | 0

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risposta

Domanda


2d Chebyshev polynomial interpolation
Hello Community, may i ask you for your help. I have a full matrix M with the N+1 number of elments in each direction. The x...

quasi 4 anni fa | 1 risposta | 0

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risposta

Risolto


Calculate Amount of Cake Frosting
Given two input variables |r| and |h|, which stand for the radius and height of a cake, calculate the surface area of the cake y...

quasi 4 anni fa

Risolto


Calculate BMI
Given a matrix |hw| (height and weight) with two columns, calculate BMI using these formulas: * 1 kilogram = 2.2 pounds * 1 ...

quasi 4 anni fa

Risolto


Calculate Inner Product
Given two input matrices, |x| and |y|, check if their inner dimensions match. * If they match, create an output variable |z|...

quasi 4 anni fa

Risolto


Solve a System of Linear Equations
*Example*: If a system of linear equations in _x&#8321_ and _x&#8322_ is: 2 _x₁_ + _x₂_ = 2 _x₁...

quasi 4 anni fa

Risolto


Find the Oldest Person in a Room
Given two input vectors: * |name| - user last names * |age| - corresponding age of the person Return the name of the ol...

quasi 4 anni fa

Risolto


Convert from Fahrenheit to Celsius
Given an input vector |F| containing temperature values in Fahrenheit, return an output vector |C| that contains the values in C...

quasi 4 anni fa

Domanda


how to create a symbolic derivative of f(r(x,y),theta(x,y)) and evaluate it
Hello Community, i have some more or less complicated funtions, e.g. a simple one: f(r,theta) = r*(pi*cos(theta)+2*sin(theta))...

quasi 4 anni fa | 1 risposta | 0

1

risposta

Domanda


solve large sparse jacobian matrix (with an example)
Hello Community, do you have a good suggestion if an iterative solver would be faster. This jacobian J with ( N = 32 ) took me...

quasi 4 anni fa | 1 risposta | 0

1

risposta

Domanda


get ridoff "for loops" while defining matrices elements, incl. improvement and reference
Hello Community, is it possible to write a code which is faster than my version? function D = Dp(N) D = (zeros(N-1,N-1)); fo...

quasi 4 anni fa | 1 risposta | 0

1

risposta

Domanda


simple Matrix manipulation without for-loop needed
Hello Community, i need your help. I have a matrix which size is (N+1,N+1). I have also some vectors with different length. Th...

quasi 4 anni fa | 1 risposta | 0

1

risposta

Domanda


extract elements and build the remain vector
Hello Community, i need your help. A vector v has 128 elements with random numbers. The elements of index 1 21 31 41 should ...

quasi 4 anni fa | 2 risposte | 1

2

risposte

Risolto


Make a full wave rectifier
Produce a full wave rectifier waveform for the given sine wave source. For a sine wave input, the output of the full wave rec...

quasi 8 anni fa

Risolto


Create an index-powered vector
Given a input vector x, return y as index-powered vector as shown below. Example x = [2 3 6 9] then y should be [...

quasi 8 anni fa

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