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John Doe


Aktiv seit 2013

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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...

fast 10 Jahre vor | 1 Antwort | 0

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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 ...

etwa 10 Jahre vor | 2 Antworten | 1

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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...

etwa 10 Jahre vor | 3 Antworten | 2

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Beantwortet
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(...

fast 11 Jahre vor | 0

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Frage


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...

etwa 11 Jahre vor | 3 Antworten | 3

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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...

etwa 11 Jahre vor | 1 Antwort | 0

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

etwa 11 Jahre vor | 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...

etwa 11 Jahre vor | 1

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

etwa 11 Jahre vor | 4

Frage


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(...

etwa 11 Jahre vor | 1 Antwort | 0

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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...

etwa 11 Jahre vor | 0 Antworten | 1

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Beantwortet
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}(:)])

etwa 11 Jahre vor | 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 ...

etwa 11 Jahre vor | 0

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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 ...

etwa 11 Jahre vor | 0 Antworten | 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...

etwa 11 Jahre vor | 1

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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 ...

etwa 11 Jahre vor | 1 Antwort | 1

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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: ...

etwa 11 Jahre vor | 1 Antwort | 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...

etwa 11 Jahre vor | 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...

etwa 11 Jahre vor | 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...

etwa 11 Jahre vor | 0

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Beantwortet
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)...

etwa 11 Jahre vor | 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...

etwa 11 Jahre vor | 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...

etwa 11 Jahre vor | 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...

etwa 11 Jahre vor | 0

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

etwa 11 Jahre vor | 2

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Beantwortet
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...

etwa 11 Jahre vor | 0

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

etwa 11 Jahre vor | 0

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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...

etwa 11 Jahre vor | 1 Antwort | 1

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Beantwortet
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 = ...

etwa 11 Jahre vor | 2

Beantwortet
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 =)

etwa 11 Jahre vor | 0

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