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Sebastian Holmqvist
Chalmers University of Technology
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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...
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
1
AntwortFrage
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] = ...
mehr als 11 Jahre vor | 1 Antwort | 0
1
AntwortFrage
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...
fast 12 Jahre vor | 2 Antworten | 0
2
AntwortenGelöst
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...
fast 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...
fast 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...
fast 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...
fast 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...
fast 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 ...
fast 12 Jahre vor
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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 ...
fast 12 Jahre vor
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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...
fast 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.
fast 12 Jahre vor
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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 ...
fast 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...
fast 12 Jahre vor
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.
fast 12 Jahre vor | 0
| akzeptiert
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...
fast 12 Jahre vor | 0
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
fast 12 Jahre vor | 0
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...
fast 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...
fast 12 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
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 ...
fast 12 Jahre vor | 3 Antworten | 0
3
AntwortenFrage
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...
fast 12 Jahre vor | 1 Antwort | 1
1
AntwortEigenvalue 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...
etwa 12 Jahre vor | 2
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...
etwa 12 Jahre vor | 2
| akzeptiert
Changing values in 2D array using logical operators
aa = rand(10, 10); aa(aa < 0.5) = NaN;
etwa 12 Jahre vor | 0
| akzeptiert
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...
etwa 12 Jahre vor | 0
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.
etwa 12 Jahre vor | 0