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Sebastian Holmqvist


Chalmers University of Technology

Attivo dal 2012

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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...

circa 11 anni fa | 0

Domanda


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

circa 11 anni fa | 1 risposta | 0

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Domanda


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] = ...

oltre 11 anni fa | 1 risposta | 0

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Domanda


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...

oltre 11 anni fa | 2 risposte | 0

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Risolto


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

oltre 11 anni fa

Risolto


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...

oltre 11 anni fa

Risolto


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

oltre 11 anni fa

Risolto


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

oltre 11 anni fa

Risolto


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...

oltre 11 anni fa

Risolto


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...

oltre 11 anni fa

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

oltre 11 anni fa

Risolto


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 ...

oltre 11 anni fa

Risolto


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 ...

oltre 11 anni fa

Risolto


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...

oltre 11 anni fa

Risolto


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

oltre 11 anni fa

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

oltre 11 anni fa

Risolto


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 ...

oltre 11 anni fa

Risolto


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...

oltre 11 anni fa

Risposto
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.

oltre 11 anni fa | 0

| accettato

Risposto
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...

oltre 11 anni fa | 0

Risposto
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

oltre 11 anni fa | 0

Risposto
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...

oltre 11 anni fa | 3

| accettato

Domanda


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...

oltre 11 anni fa | 2 risposte | 0

2

risposte

Domanda


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 ...

oltre 11 anni fa | 3 risposte | 0

3

risposte

Domanda


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...

oltre 11 anni fa | 1 risposta | 1

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Risposto
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...

quasi 12 anni fa | 2

Risposto
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...

quasi 12 anni fa | 2

| accettato

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

quasi 12 anni fa | 0

| accettato

Risposto
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...

quasi 12 anni fa | 0

Risposto
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.

quasi 12 anni fa | 0

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