Answered
Not enough input arguments
How do you call this function? You need input arguments when running it (you can't press F5 or something similar). You co...

nästan 11 år ago | 0

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Answered
Help with Basic 2D Contour Plot
Follow the instructions from Friedrich, but flip the matrix around before you plot it. Now, Z(1,1) is in the origin, Z(1,2)...

nästan 11 år ago | 0

Answered
Help with Basic 2D Contour Plot
Will this work for you? q = zeros(4); for s=[0:1:3], for t=[0:1:3], q(t+1,s+1)=triarea(s,t) end...

nästan 11 år ago | 0

Answered
how can I create a vector with unknown length?
The most intuitive (and simple to implement) is probably bubble sort: <https://en.wikipedia.org/wiki/Bubble_sort> Since th...

nästan 11 år ago | 1

Answered
How to shift the origin or how to make median of the data to be origin or zero?
Do you just want to substract the median value? In that case: cc = aa-median(aa); Now the median of cc = 0. Hope it h...

nästan 11 år ago | 0

Answered
matrix manipulation and components
Is this what you're asking for? A(A>3.1) - Rob

nästan 11 år ago | 2

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Answered
How create serial RLC circuit in Simulink?
It looks as though your intial conditions are 0 for both integrators. Are you supposed to simulate the system in steady-stat...

nästan 11 år ago | 0

Answered
traversing a long matrix
I think this should work ind = find(A(:,1) == A(:,2)); - Rob

nästan 11 år ago | 0

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Question


Strange results from tic / toc.
I'm checking the running time of a function using tic/toc. I write the following in the command window (and execute it simultane...

nästan 11 år ago | 1 answer | 1

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Answered
Filling vector with a condition.
Like this? A = [1 2 -3 0 4 0 -5 0 6]; B = 10:19; C = zeros(1,length(A)); C(A>0) = B(A>0) C = ...

nästan 11 år ago | 2

Answered
I can correct the error. Help me please!!
This should work: [X,Y] = meshgrid(x,y); f = sin(power(X,2)-power(Y,2)) Hope it helps =)

nästan 11 år ago | 0

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Answered
How to determine the position of an integer
If you want to use the |find| function: pos = find(d==3);

nästan 11 år ago | 0

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Answered
How to get the desired frequency in simplified synchronous machine?
The electrical frequency is, as stated in the comments: f_elec = poles * f_mec / 2 I was wondering what you were doing, ...

nästan 11 år ago | 0

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Answered
??? Subscript indices must either be real positive integers or logicals.
Is this what you're trying to do? %% Don't run this part A = magic(4); %% Run this part by itself x = 0.8; f ...

nästan 11 år ago | 0

Answered
My input video is in the format of mp4. Does matlab supports this file format?
Should be unnecessary to ask this question in a forum. You can google these things very easily. The answer is yes. <http:/...

nästan 11 år ago | 0

Question


Finding the indices of all edges within k steps from a chosen line in an adjacency matrix
I have a function where I can find all nodes k number of steps from any initial set of nodes in a sparse adjacency matrix. Norma...

nästan 11 år ago | 0 answers | 0

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Answered
trying to right code to generate matrix for three different frequency
w = [100 200 400]; A = zeros(2,2,3); B = zeros(1,2,3); C = zeros(1,2,3); for i = 1:3 A(:,:,i) = [0 1;...

nästan 11 år ago | 0

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Answered
Undefined function or variable 'in'.
Well the reason is that you haven't defined 'in' anywhere. My guess is that the input variable should be named 'in'. You hav...

nästan 11 år ago | 0

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Answered
function performance, same functions has very different speed
I believe this is due to the way matrices are stored in Matlab. A matrix is stored column-wise, as below: A = [1 2 3;4 ...

nästan 11 år ago | 0

Answered
How to generate a system of four equations in four unknows to be solved in a matrix?
If you are familiar with solving linear equations on matrix form by hand, you start of the same way: A*x = b, where b = the v...

nästan 11 år ago | 0

Answered
Finding all edges (and nodes) within X steps from a chosen line in an adjacency matrix
I have found a good answer to my question above (Thanks to Dr_Sam!). 1: Add 1 on the diagonal of the matrix A. 2: Build a...

nästan 11 år ago | 0

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Question


Finding all edges (and nodes) within X steps from a chosen line in an adjacency matrix
I have a nx2 matrix of to-from nodes for a large network structure. I have used this to create a sparse adjacency matrix which I...

nästan 11 år ago | 1 answer | 0

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Question


How to graph a connectivity/adjacency matrix?
I want to graph the structure of a network (a power grid). I have a list containing to-from nodes for each branch. The BIOGRA...

nästan 11 år ago | 1 answer | 0

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Answered
Start matlab on windows 8
If Matlab is installed, and unless your computer is acting up, this should work: 1. Press the windows button, (to enter the s...

ungefär 11 år ago | 0

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Answered
How do I create a vector with the first day of each month?
Not quite sure what you are asking for here. I assume you have a vector with all days from Monday-Sunday, and you know which...

ungefär 11 år ago | 0

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Question


Calculating parts of the sparse matrix inverse
I have a sparse symmetric matrix H, containing on average 4 non-zero elements per row/col, and a sparse vector M with only two n...

ungefär 11 år ago | 1 answer | 1

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