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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...
7 mois il y a | 1 réponse | 0
1
réponseQuestion
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...
environ un an il y a | 1 réponse | 0
1
réponseQuestion
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...
plus d'un an il y a | 1 réponse | 0
1
réponseQuestion
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...
presque 2 ans il y a | 1 réponse | 0
1
réponseQuestion
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...
presque 2 ans il y a | 1 réponse | 0
1
réponseQuestion
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...
environ 2 ans il y a | 3 réponses | 0
3
réponses
A soumis
Composite Simpson's rule for irregularly spaced data
Composite Simpson's rule for irregularly spaced data based on a parabolic polynomial fit.
plus de 2 ans il y a | 1 téléchargement |
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...
presque 4 ans il y a | 2 réponses | 0
2
réponsesQuestion
eigs with Extended Capabilities
Hello Community, in the documentation of eigs: Extended Capabilities Thread-Based Environment Run code in the background usi...
presque 4 ans il y a | 1 réponse | 0
1
réponseQuestion
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...
environ 4 ans il y a | 2 réponses | 0
2
réponsesset 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...
environ 4 ans il y a | 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...
environ 4 ans il y a | 2 réponses | 0
2
réponsesQuestion
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...
plus de 4 ans il y a | 1 réponse | 0
1
réponseQuestion
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...
plus de 4 ans il y a | 1 réponse | 0
0
réponseQuestion
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. ...
plus de 4 ans il y a | 1 réponse | 0
1
réponseQuestion
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 ...
plus de 4 ans il y a | 1 réponse | 0
1
réponseQuestion
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...
plus de 4 ans il y a | 1 réponse | 0
1
réponseA résolu
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...
plus de 4 ans il y a
A résolu
Calculate BMI
Given a matrix |hw| (height and weight) with two columns, calculate BMI using these formulas: * 1 kilogram = 2.2 pounds * 1 ...
plus de 4 ans il y a
A résolu
Calculate Inner Product
Given two input matrices, |x| and |y|, check if their inner dimensions match. * If they match, create an output variable |z|...
plus de 4 ans il y a
A résolu
Solve a System of Linear Equations
*Example*: If a system of linear equations in _x₁_ and _x₂_ is: 2 _x₁_ + _x₂_ = 2 _x₁...
plus de 4 ans il y a
A résolu
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...
plus de 4 ans il y a
A résolu
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...
plus de 4 ans il y a
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))...
plus de 4 ans il y a | 1 réponse | 0
1
réponseQuestion
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...
presque 5 ans il y a | 1 réponse | 0
1
réponseQuestion
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...
presque 5 ans il y a | 1 réponse | 0
1
réponseQuestion
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...
presque 5 ans il y a | 1 réponse | 0
1
réponseQuestion
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 ...
presque 5 ans il y a | 2 réponses | 1
2
réponsesA résolu
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...
presque 9 ans il y a
