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John Doe


Attivo dal 2013

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Domanda


Golf Recamán's sequence
Recamán's sequence described in pseudo-code is as follows: A(0) = 0 A(n) = A(n-1) - n if A(n-1) - n > 0 and is new, else...

oltre 10 anni fa | 1 risposta | 0

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Domanda


Can I find out in which release a function was introduced?
Sometimes I get error messages saying stuff like: Undefined function 'savefig' for input arguments of type 'char' or ...

oltre 10 anni fa | 2 risposte | 1

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Domanda


x = 0:0.1:10... What's going on, really?
Please have a look at the following example: A = 0:0.1:0.4; find(A == 0.3) ans = Empty matrix: 1-by-0 fi...

quasi 11 anni fa | 2 risposte | 2

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Finding integers between two vectors
A= [4.54 5.11 9.58 15.04]; B= [1.01 3.2 5.5 16.98]; C = sort([A; B]); C(1,:) = ceil(C(1,:)); C(2,:) = floor(C(...

oltre 11 anni fa | 0

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Domanda


Using bsxfun for non-numeric data
Is there an equivalent to bsxfun for non-numeric data? For example, I want to compare all pairs of strings stored in two cell...

oltre 11 anni fa | 3 risposte | 3

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Domanda


Find row number of elements
Hi, I have a list of branches, |BL|, and a list of nodes, |nodeList|. BL has two columns, containing to-from nodes for each b...

oltre 11 anni fa | 1 risposta | 0

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join two matrices together
C = reshape([A; B],177,8) Good luck! - Rob

oltre 11 anni fa | 1

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what is the meaning of BW = ~ BW?
It gives you back the inverted binary matrix BW. That means, all 1's turns to 0's, and vice versa. In plain text: BW = not...

oltre 11 anni fa | 1

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multiplication table in matlab
Another one-liner: cumsum(meshgrid(1:10))

oltre 11 anni fa | 4

Domanda


Format axes in plot
Is it possible to color a single number (or a set of numbers) on one of the axes in Matlab? Suppose I have a plot: plot(...

oltre 11 anni fa | 1 risposta | 0

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Domanda


Legend in biograph plot
I have a |biograph| object, and I want to "color-code" the edges and vertices. Is it possible to get legends in the biograph...

oltre 11 anni fa | 0 risposte | 1

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Mean of 2 arrays
One way would be: mean(mean([imag{1} imag{2}])) If the dimensions don't match: mean([imag{1}(:); imag{2}(:)])

quasi 12 anni fa | 1

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Adding two different size matrices
You can't add matrices of different dimensions. The transpose of A has dimension (50x100) Think of it: A = [1 2 ...

quasi 12 anni fa | 0

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Domanda


Speed up sparse matrix calculations
Is it possible to speed up large sparse matrix calculations by e.g. placing parantheses optimally? What I'm asking is: Can I ...

quasi 12 anni fa | 0 risposte | 0

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Explanation of the code
The input to |cosd| and |sind| are in degrees, whereas it is in radians for |cos| and |sin|. l = sind(alpha)*b; % the verti...

quasi 12 anni fa | 1

Domanda


Profiling for cells instead of functions
I have a function that in turn calls many more functions. I want to use the profiler to identify what parts of the code is most ...

quasi 12 anni fa | 1 risposta | 1

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Domanda


Finding the difference between columns in matrix without loops
I have the results from an iterative process, where the results from each iteration is placed beside eachother, like this: ...

quasi 12 anni fa | 1 risposta | 0

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Not enough input arguments
Use lower case m, or some other letter that can't be mixed with upper case M, as indices in your for-loops, and you'll get there...

quasi 12 anni fa | 0

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Please tell me what's wrong here with the exp (1j*theta)
The reason is that: 5 rad = -1.2832 rad % (-1.2832 + 2*pi = 5) That is: x = x + n*2*pi; % where x is an angle in...

quasi 12 anni fa | 0

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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...

quasi 12 anni fa | 0

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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)...

quasi 12 anni fa | 0

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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...

quasi 12 anni fa | 0

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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...

quasi 12 anni fa | 1

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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...

quasi 12 anni fa | 0

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

quasi 12 anni fa | 2

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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...

quasi 12 anni fa | 0

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

quasi 12 anni fa | 0

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Domanda


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...

quasi 12 anni fa | 1 risposta | 1

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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 = ...

quasi 12 anni fa | 2

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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 =)

quasi 12 anni fa | 0

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