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Sebastian Holmqvist


Chalmers University of Technology

38 total contributions since 2012

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Answered
Possible to vectorize xcorr?
After some time, I realized that x is the same throughout all calculations, which means that I can pre-calculate both it's FFT a...

mehr als 6 Jahre ago | 0

Question


Possible to vectorize xcorr?
Greetings. Currently my workstation can't keep up when I attempt to calculate the cross correlation for very long signals. ...

mehr als 6 Jahre ago | 1 answer | 0

1

answer

Question


Extreme gain for low pass filter
% Filter constants Wp = 5e3*2*pi; Ws = 9.5e3*2*pi; Rp = 2; Rs = 45; % Butterworth lowest order [n,Wn] = ...

fast 7 Jahre ago | 1 answer | 0

1

answer

Question


Arduino Run on Target Hardware + Stateflow
Hi! I'm trying to setup Arduino through Simulink on R2012a and use Stateflow. But when I try to deploy (Run on Target) it com...

etwa 7 Jahre ago | 2 answers | 0

2

answers

Solved


Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

etwa 7 Jahre ago

Solved


Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

etwa 7 Jahre ago

Solved


Weighted average
Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...

etwa 7 Jahre ago

Solved


Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

etwa 7 Jahre ago

Solved


Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

etwa 7 Jahre ago

Solved


Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

etwa 7 Jahre ago

Solved


Is my wife right?
Regardless of input, output the string 'yes'.

etwa 7 Jahre ago

Solved


Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

etwa 7 Jahre ago

Solved


Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

etwa 7 Jahre ago

Solved


Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

etwa 7 Jahre ago

Solved


Add two numbers
Given a and b, return the sum a+b in c.

etwa 7 Jahre ago

Solved


Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

etwa 7 Jahre ago

Solved


Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

etwa 7 Jahre ago

Solved


Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

etwa 7 Jahre ago

Answered
How can I get in code the path of currently running deployed matlab function
_pwd_ also returns the current path. This is what I use in my GUIs.

mehr als 7 Jahre ago | 0

| accepted

Answered
The thickness of border lines on a plot (different than that of the inner lines)
I found that the figure automatically chooses the renderer ZBuffer, which is the cause of your display issues. I can't answer as...

mehr als 7 Jahre ago | 0

Answered
How to tell Matlab to ignore NaNs in calculations/loops
data_vec = [1 2 3 4 5 NaN 7 8 NaN 10 12]; data_vec(~isnan(data_vec)) ans = 1 2 3 4 5 7 8 10 12

mehr als 7 Jahre ago | 0

Answered
How to calculate hash sum of a string (using java)?
*Solution:* The trick here is to input an ascii representation of your string (hence, the double(string) call). MessageDigest...

mehr als 7 Jahre ago | 1

| accepted

Question


How to calculate hash sum of a string (using java)?
Couldn't find this very easily (without including a bunch of c-mex files etc) so I thought I'd post it here for future reference...

mehr als 7 Jahre ago | 2 answers | 0

2

answers

Question


Count the number of trend changes in a vector.
I need to count the number of times a vector increases/decreases. E.g vec = [0 0 1 2 4 4 2 0 1 2 3] diff(vec) ans ...

mehr als 7 Jahre ago | 3 answers | 0

3

answers

Question


XML parsing vs regexp
I'm trying to extract values from two elements in a pretty large xml. I'm stuck between doing it "the right way" and doing it "t...

mehr als 7 Jahre ago | 1 answer | 1

1

answer

Answered
Eigenvalue calculation in MATLAB
From <http://www.mathworks.se/help/techdoc/ref/eig.html> [V,D] = eig(A,B,flag) specifies the algorithm used to compute eigen...

mehr als 7 Jahre ago | 2

Answered
Having trouble compiling uigetfile function
It always works for me. It could be that you only call filename = uigetfile('*.xls','Select your file'); Instead, you sho...

mehr als 7 Jahre ago | 2

| accepted

Answered
Changing values in 2D array using logical operators
aa = rand(10, 10); aa(aa < 0.5) = NaN;

mehr als 7 Jahre ago | 0

| accepted

Answered
Count the number of trend changes in a vector.
I think I've cracked it. My logic follows from; # I wish to count the number of first derivative changes. # I wish to exclud...

mehr als 7 Jahre ago | 0

Answered
How can I Read or get the Values one by one from matrix variable or array?
z_elem = nnz(nnz == 0) nz_elem = nnz(nnz ~= 0) Then do your calculations on each.

mehr als 7 Jahre ago | 0

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