Marko

TU Wien

Last seen: ungefär en månad ago | Active since 2016

Followers: 0 Following: 0

Message

interested in maths, algorithms and fluid dynamics

Statistics

All

View badges

Feeds

Question

figure export in epsc-file produce artefacts
Hello Community, the LineStyle of the figure and the exported "eps-File" are different. Is this a bug in the eps-export routin...

9 månader ago | 1 answer | 0

1

answer

Question

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...

ungefär ett år ago | 1 answer | 0

1

answer

Question

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...

mer än ett år ago | 1 answer | 0

1

answer

Question

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...

ungefär 2 år ago | 1 answer | 0

1

answer

Question

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...

ungefär 2 år ago | 1 answer | 0

1

answer

Question

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...

ungefär 2 år ago | 3 answers | 0

3

answers

Submitted

isaVisc
provides the viscosity of the ISA model.

mer än 2 år ago | 0 downloads |

0.0 / 5

Submitted

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

mer än 2 år ago | 1 download |

0.0 / 5

Question

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...

nästan 4 år ago | 2 answers | 0

2

answers

Question

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

ungefär 4 år ago | 1 answer | 0

1

answer

Question

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...

mer än 4 år ago | 2 answers | 0

2

answers

Answered
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...

mer än 4 år ago | 0

Question

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...

mer än 4 år ago | 2 answers | 0

2

answers

Question

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...

mer än 4 år ago | 1 answer | 0

1

answer

Question

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...

mer än 4 år ago | 0 answers | 0

0

answers

Question

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. ...

mer än 4 år ago | 1 answer | 0

1

answer

Question

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 ...

nästan 5 år ago | 1 answer | 0

1

answer

Question

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...

nästan 5 år ago | 1 answer | 0

1

answer

Solved

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...

nästan 5 år ago

Solved

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

nästan 5 år ago

Solved

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

nästan 5 år ago

Solved

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...

nästan 5 år ago

Solved

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...

nästan 5 år ago

Solved

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...

nästan 5 år ago

Question

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))...

nästan 5 år ago | 1 answer | 0

1

answer

Question

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...

nästan 5 år ago | 1 answer | 0

1

answer

Question

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...

nästan 5 år ago | 1 answer | 0

1

answer

Question

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...

nästan 5 år ago | 1 answer | 0

1

answer

Question

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 ...

nästan 5 år ago | 2 answers | 1

2

answers

Solved

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...

ungefär 9 år ago