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Extract matrices out of a symbolic matrix
It looks like you are trying to extract the diagonal, upper triangular and lower triangular parts of the matrix. These commands ...

alrededor de 7 años hace | 0

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Results showing up as NaN
Here is one source of NaN's: In |slipratio_fun| with the initial value of |t=0| and |v=0|, you have |omega=v=0|. The line ...

alrededor de 7 años hace | 0

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Warning: The solutions are parameterized by the symbols: z
The function |solve| is part of the Symbolic Math Toolbox. Are you defining the symbolic variables? If I run this code syms...

alrededor de 7 años hace | 0

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How to calculate value using different matrix using if and for loop
In the line if abs(b) < 14.5 the condition is looking at the entire 100 x 1 vector |b|, and the condition is only true i...

alrededor de 7 años hace | 0

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How can we plot a function with domain involving infinity
Of course, you can't plot the whole thing, but you can plot enough so that it's obvious where the curve is going. One approach i...

alrededor de 7 años hace | 0

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How can I change a certain part of a graph to a certain constant value?
Here is one way: y(x>=0.2*pi & x<=0.8*pi) = sin(0.2*pi); Note that I use inequalities because there are no values of |x|...

alrededor de 7 años hace | 1

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Convert complex double to double type
Judging by the discussion in the <http://stackoverflow.com/questions/37320761/convert-complex-double-to-double-type-in-matlab St...

alrededor de 7 años hace | 0

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what does this line means in the following code? I=I(200:400,250:450,:); and when i change the ratio there comes an error of "index exceeds matrix dimensions"
The function <https://www.mathworks.com/help/matlab/ref/imread.html imread> retrieves a 3D array consisting of 2D images in vari...

alrededor de 7 años hace | 0

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How to plot a single collection of points
You need to separate the x and y coordinates. Here is one solution: data = [X{:}]; xdata = data(1,:); ydata = data(2,:) p...

alrededor de 7 años hace | 1

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findpeaks() neglecting the high amplitude peaks.Does not work as exptected
When I try this code, I get 7 plots, and figure 7 looks like your figure except that all the peaks are correctly identified: ...

alrededor de 7 años hace | 0

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Double Integral using Integral2 Error
Based on the above discussion, the critical part of code you need is as follows: myfun_eq8=@(phi) exp(f*phi).*cos(phi).*sin...

alrededor de 7 años hace | 1

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Extract every subexpression in a symbolic expression between + and -
Depends whether you have muPAD. In the Symbolic Toolbox, you can use E = expand(E); to separate the terms, but then you ...

alrededor de 7 años hace | 0

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How do I call and multiply handles from an array in integral or quad function?
You can replace B by a cell array of functions, and then call the functions when it's time to integrate: Bfuns = {@(x) ones...

alrededor de 7 años hace | 1

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Storing a struct in a cell
Try curly brackets: groupavg{:,i} = averages.timelock.(subject{i}); This places the RHS _inside_ the cell element instea...

alrededor de 7 años hace | 2

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In an assignment A(:) = B, the number of elements in A and B must be the same.
Look at the first part of a line of code in |projectmatrix.m|: dx(2) = ((k1 - k2)/m1)*u1 On the left side, you have a sc...

alrededor de 7 años hace | 0

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Simplify symbolic expression for optimized code generation
I don't know how particular you are about the exact form of the simplified expression, but this certainly produces a simpler exp...

alrededor de 7 años hace | 0

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How to calculate euclidean distance for 3 vectors using matlab
You can find the Euclidean distance between two vectors |v1| and |v2| using <http://www.mathworks.com/help/matlab/ref/norm.html ...

alrededor de 9 años hace | 0

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Here is <http://www.mathworks.com/matlabcentral/profile/authors/869215-john-d-errico John D'Errico> again, answering the questio...

alrededor de 9 años hace | 0

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one thing i need to know

alrededor de 9 años hace | 1

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smooth a surface plot
You can make a mesh: [P1,P2] = meshgrid(P1,P2); Then use |interp2|. *EDIT:* Corrected typo.

alrededor de 9 años hace | 1

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how to count the total number of recursion ?
The problem is that you're not passing |num| to |collatz|, so how can it know how many times it has been called? Here is a versi...

alrededor de 9 años hace | 1

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If you're trying to collect all the values for the inner loop ( |for i=1:fil| ), you could try putting M = []; above the...

alrededor de 9 años hace | 0

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Plotting 10 graphs with different colors and markers
There is a table in <http://www.mathworks.com/help/matlab/ref/linespec.html LineSpec (Line Specification)> with 13 different mar...

alrededor de 9 años hace | 0

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Unnest a Matrix of strings
If I understand what you're trying to do, you can't do it. A 3x3 matrix of strings looks like this: ['abc';'def';'ghi'] ...

alrededor de 9 años hace | 1

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Simple question about plotting a convolution
Your code will give you a vector of length |length(y1)+length(y2)-1|, so you'll get an error if you plot it against |x| (which i...

alrededor de 9 años hace | 0

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Inner matrix dimensions must agree.
Note the top error statement: Inner matrix dimensions must agree. Have you tried testing these functions with vector arg...

alrededor de 9 años hace | 0

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Help on sign function argument
Use 2*sign(x-0.01)-1

alrededor de 9 años hace | 0

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How to Create Libraries in Matlab?
The simplest approach would be to put the functions in their own folder and add that folder to the <http://www.mathworks.com/hel...

alrededor de 9 años hace | 1