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Jon


108 total contributions since 2013

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Answered
Interpolation values from a table
If T.area is a cell array, and maybe T.Mach is also a cell array you must first turn them into ordinary MATLAB vectors, (n by...

3 days ago | 0

Answered
Having trouble getting legend to display properly
You could also try putting a common legend on the bottom of the page. Here is an example of how to do that x = 1:100; y = rand...

3 days ago | 0

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connection Ports of subsystem
It looks like you are using Simscape. I don't have it, so I can't try, but I think you need to convert from a Simulink signal to...

4 days ago | 0

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How to fit a general curve on different datasets ?
If I am understanding what you are trying to do correctly, it seems like you should be able to concatenate all of your individua...

4 days ago | 0

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matrix with vectors: multiplication and generation issue
Yes you could do this with a loop, for example, with just some arbitrary set values for i, a, b, c, d, e, g to illustrate theta...

5 days ago | 1

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Answered
How to Create the following discrete signal (Y[n]) in MATLAB?
You could do something like this x = [-1 0 1 2 3 4 4 4 4 4] n = 1:length(x) y = NaN(1,n(end)) % preallocate providing NaN (No...

6 days ago | 0

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add new rows to a Matrix
Just as another possibility, this approach is much less general than @Jos but will work for your special case. I didn't look in...

15 days ago | 0

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How do I get my code to run multiple times? My code looks as follows. My code shows X = 3 when A wins and X = -3 when B wins. I would like to get this code to run multiple times and see how many times A wins out of 10 or so matches.
You don't need a loop for this, just do something like the following N = 10 % number of trials X = rand(N,1) Awins = sum(X<0....

16 days ago | 0

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Answered
How to divide data into different cells?
Your looping logic looks quite complicated, and it is difficult to follow exactly what your intent is here. From your verbal des...

18 days ago | 0

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Answered
Faster Alternative to export_fig
Improving somewhat on my earlier comment you could do something like this % provide matrix dimension m = 900; n = 1600; ...

18 days ago | 0

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Answered
Problems building a plot
In general the error you are getting is telling you that if you want to plot one variable against another they both have to have...

19 days ago | 0

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Index Vector Operation in Matlab
Actually A(b) with the example you have given will return [13 14 2 14 10]. That is the elements are taken from the first column ...

20 days ago | 0

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Answered
Polynomial to the power of polynomial.
You should be able to use the MATLAB function fzero for this purpose. You will have call it repeatedly (maybe in a loop) with a ...

20 days ago | 0

Answered
fopen with string vector
Your first problem is that dir returns a structure. If you want the name of, the ith file it returns you should use Name = S(j)...

20 days ago | 0

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Answered
Using a Subroutine to Create a Plot
I think that what you describe could be implemented with a simple loop. So make a vector of radii that you want to evaluate, set...

23 days ago | 0

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Answered
nonlinear fit of experimental data
In your example you find a fit to a function of one variable, and are somehow looking for a combination of terms to form that on...

23 days ago | 0

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Using find to check the contents of files within a struct
It looks like your difficulty is coming from the argument that you are providing to the find command. If you look carefully at ...

25 days ago | 0

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Answered
Taking middle 4 values of n size array
You could use something like, for an array A n = length(A(:)) % : treats as column even if this is actually a multidimensional ...

26 days ago | 1

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Answered
Program for Impulsive Difference Equations
One way to approach this is to transform your difference equation in the single variable y to a system of two difference equatio...

26 days ago | 1

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Answered
How should i go about solving a set of ODEs for a set of data points? I would like to automate it as much as possible.
Please see my earlier comments. From the behavior you describe, it looks like Sol1 and SolRequired are returned empty from wha...

27 days ago | 0

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Answered
How should i go about solving a set of ODEs for a set of data points? I would like to automate it as much as possible.
I am not clear on the details of your implementation. It would take some time to go through it all line by line. In case it is ...

27 days ago | 1

Answered
How to differentiate elements in a matrix by each other
Say your matrix is called M, you could do something like % find incremental change from one row to the next delta = diff(M); ...

27 days ago | 1

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Answered
How to organize a table?
You could do this with a simple loop I'll assume your table is called mytable % find maximum possible value for cell type cell...

30 days ago | 0

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Answered
concatenating and comparing two datsets
Assuming that the 9th column of both data sets is the same, I think you can do this just with an innerjoin tbl1 = readtable('da...

1 month ago | 1

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Answered
I want to add a line of best fit to my plot using the polyfit function.
You can do something like this p = polyfit(xL(A),anglex,1); anglexFit = polyval(p,xL(A)); plot(xL(A),anglex,'ko',xL(A),anglex...

1 month ago | 0

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open loop response for nonlinear system
Basically you need to define the set of ODE's (ordinary differential equations) that define your system and then solve them. MAT...

1 month ago | 0

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How to implement a frequency dependent analysis?
You are quite close with your code. I think you just need to use the semilogx with a few annotations as shown below %Schirmdämp...

1 month ago | 0

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Answered
How do I plot a 3D mesh from multiple csv files?
The problem apparently is with loading the files, nothing to do with plotting 3d mesh, or at least it didn't get far enough to h...

1 month ago | 0

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Answered
Insert missing date and corresponding values in a matrix?
I'm not completely clear on what it is you are trying to do, but I think you want to plot the values in the third column against...

1 month ago | 0

Answered
how to call nested structure and cell array?
I'm not sure exactly what you mean by "call the first column of the data.timepoints" If you wanted to assign some other variabl...

1 month ago | 0

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