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Sebastian Holmqvist


Chalmers University of Technology

Aktiv seit 2012

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Beantwortet
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 11 Jahre vor | 0

Frage


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 11 Jahre vor | 1 Antwort | 0

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Antwort

Frage


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] = ...

etwa 12 Jahre vor | 1 Antwort | 0

1

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Frage


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 12 Jahre vor | 2 Antworten | 0

2

Antworten

Gelöst


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

etwa 12 Jahre vor

Gelöst


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 12 Jahre vor

Gelöst


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 12 Jahre vor

Gelöst


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

etwa 12 Jahre vor

Gelöst


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 12 Jahre vor

Gelöst


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 12 Jahre vor

Gelöst


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

etwa 12 Jahre vor

Gelöst


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 12 Jahre vor

Gelöst


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 12 Jahre vor

Gelöst


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 12 Jahre vor

Gelöst


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

etwa 12 Jahre vor

Gelöst


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

etwa 12 Jahre vor

Gelöst


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 12 Jahre vor

Gelöst


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 12 Jahre vor

Beantwortet
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 12 Jahre vor | 0

| akzeptiert

Beantwortet
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 12 Jahre vor | 0

Beantwortet
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 12 Jahre vor | 0

Beantwortet
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 12 Jahre vor | 3

| akzeptiert

Frage


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 12 Jahre vor | 2 Antworten | 0

2

Antworten

Frage


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 12 Jahre vor | 3 Antworten | 0

3

Antworten

Frage


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 12 Jahre vor | 1 Antwort | 1

1

Antwort

Beantwortet
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 12 Jahre vor | 2

Beantwortet
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 12 Jahre vor | 2

| akzeptiert

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

mehr als 12 Jahre vor | 0

| akzeptiert

Beantwortet
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 12 Jahre vor | 0

Beantwortet
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 12 Jahre vor | 0

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