Answered
how to check if a 3D point is inside a 3D cone
1) Define a unit vector, U, which points along the axis of the cone. 2) Define vector VR which points from the cone vertex, V...

7 years ago | 2

Answered
ode45 System of Equations Difficulties - Launch Vehicle Simulation
The ODE solver has a hard time dealing with discontinuities. If any part of the equation set contains discontinuities, or even ...

7 years ago | 1

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Answered
Simulink: Signal for specified timesteps
Use a triggered subsystem to generate the desired signal. The trigger signal is based on time. <</matlabcentral/answers/uplo...

7 years ago | 0

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Simulink: is there something like a “pre-build” callback function?
In the Simulink model configuration parameters, there is a tab for "Simulation Target\Custom Code". Here you can specify "Inclu...

7 years ago | 0

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Simulink 'To Workspace' block inactivated when additional simulation parameters are provided
I have noticed a similar issue using simstate. see the link. <https://www.mathworks.com/matlabcentral/answers/398441-matlab-...

7 years ago | 1

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Answered
ploting differential equation 2 order
Here is how to do this: y0=[0 0] tspan=[0,100] w=0.1 odefun=@(t,y) [y(2);cos(w*t)+y(2)+3*y(1)]; [t1,y1]=ode45(odef...

7 years ago | 0

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How to find the inverse of a 2x2 matrix using gaussian elimination (not using rref or lu)?
The inverse of a 2x2 is very easy to calculate: <</matlabcentral/answers/uploaded_files/118098/MatlabAnswers20180518.JPG>> ...

7 years ago | 1

Answered
How to define time vectors using different sampling rates and plot.
You have the right idea. The convention is startValue:stepSize:EndValue t=0:0.1:300 will give 3001 samples at 0.1 s...

7 years ago | 0

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Bug Tracker for Simulation Models
In the past, I have used spreadsheets and database programs (MS Access) for issue/bug tracking in simulations. This does requir...

7 years ago | 1

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Answered
How can people who are bad at math and have no programming aptitude learn MATLAB? (Long question)
One Guru who I highly admire lives by the saying "There is no teaching, there is only learning". His philosophy is that the bur...

7 years ago | 2

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while loop simulink running
for c=1:10 sim('SimulinkModelName') end This will run the specified Simulink model 10 times with c=1 to 10.

7 years ago | 0

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How to make all the buttons of same size in matlab guide
Right-click on the pushbutton and open the property inspector. There you can set the exact height and width of the button (in t...

7 years ago | 1

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Answered
How can I evaluate the next state to take a decsion in Simulink?
Here is my thought: <</matlabcentral/answers/uploaded_files/116641/MatlabAnswers20180508.JPG>> This used duplicate control...

7 years ago | 0

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matlab simulink simstate issue
I notice the same thing. If I use this, then SimState is not saved: set_param('mysim','SaveFinalState','on','FinalStateNam...

7 years ago | 0

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Timeseries names and tscollection always empty of datas
When you save data as a time series, Matlab creates a structure which contains your output data. You select the name (e.g. "MyO...

7 years ago | 0

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S-function Restart Capability
I do this sort of thing all the time. You can do anything in an S-function, all you have to do is code it. The S-function ca...

7 years ago | 0

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Smoothing Numerical Differentiation Result
The attached file contains some higher-order methods for computing numerical derivatives. You can start with this. For very we...

7 years ago | 0

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Answered
For loop and if statement in MATLAB
First of all, when calculating the masses you have to MULTIPLY the volume by the density. You should always verify this using...

8 years ago | 0

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Unable to meet integration tolerances without reducing the step size below the smallest value allowed
It's very hard to evaluate without all of the functions. The first thing I would check is the output of the interpolation funct...

8 years ago | 1

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Find propeller rotation axis using point cloud
This problem is similar to ones that I have worked in my career in missile development. You have inspection data from aerodynam...

8 years ago | 1

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Mass spring system: given code unable to run and returning errors
The code works just fine for me. Perhaps you have a variable that is ghosting one of your variables. Try clearing the workspac...

8 years ago | 0

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Answered
Help!! I have no idea what this question is asking, nor how to solve it...
You have a couple errors in your code. First, your calculation of the area is wrong. Area is pi*radius^2, or pi*diameter^2/4...

8 years ago | 0

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Answered
How to write a program that will randomly return any one of the given statements
First, I agree with Birdman, use a single list of values, not N different variables. I would solve this problem based on crea...

8 years ago | 0

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When I first learned programming ...
College, FORTRAN IV, on a PDP-11 series mainframe. In my freshman year (California Polytechnic University, Pomona), punching ca...

8 years ago | 1

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How to split signal in simulink?
I'm not sure if this is the answer to your question, but Here is how to access a signal from the previous calculation iteration,...

8 years ago | 0

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Answered
Numerical Integration with Infinity as the upper limit
f(x) = 8*e^(-x/10) dx Integral f(x) = -80*e^(-x/10) + C

8 years ago | 0

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How can I use calculated value
I think that the reason that no one has offered an answer to your question for the last 20 hours is, in part, because the quest...

8 years ago | 0

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Answered
How to compute Newton Raphson coding on Matlab?
Here is how I would code it: xguess = 0; % initial guess emax = 1e-7; % Maximum error imax = 1000; % maxim...

8 years ago | 1

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Answered
Create a vector 't' and vector 'f' where 'f' is a mathematical function to plot.
How about this: t = 0:.01:1; f = t.^2+3.*t-15; figure; plot(t,f,'b'); grid;

8 years ago | 0

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Answered
How to convert two 3D coordinates to Euler angles?
According to the documentation for function vrrotvec, the output of this function is a rotation vector, not a rotation matrix. ...

8 years ago | 0