Why ,the quaternion values from sensor fusion toolbox are switched ?
There are two different ways that are commonly used to represent quaternions. Q = [a,b,c,d] with d being the scalar part, and a...

casi 2 años ago | 0

Euler's method for two first order differential equations?
Try preallocating x and y nsteps = (b-a)/h + 1; % this is the number of elements in t(a:h:b) (It is = N+1) x=zeros(1,nsteps);...

casi 2 años ago | 0

| accepted

How do i create a projectile?
Always start by making a drawing of the problem. Define the coordinate system (which way is positive/negative) What are the pa...

casi 2 años ago | 0

Error - Undefined function or variable
Line 16: if epsc<=eps0 Variable epsc is not defined.

casi 2 años ago | 0

two body problem using ode45
I have studied the 2-body problem and the accuracy of different numerical solutions. See my comments in this thread: Discussi...

casi 2 años ago | 1

All sample times for this block must be discrete. No continuous or constant sample times are allowed
On the Simulink toolbar, select "Display" - "Sample time" and check "all". This will show the sample time for all of the signa...

casi 2 años ago | 0

Equation of Motion is Blowing Up
It's seems pretty clear from the plot of angle vs. speed that the system is gaining energy. You really need to draw a picture o...

casi 2 años ago | 0

Array indices must be positive integers or logical values
Matlab does not allow an index value of zero. deltaR = (b(0) ... similar in deltaS.

casi 2 años ago | 0

computation of GPS receiver position based on RINEX observation file
You are using the wrong function to try to read a file. The function 'read' operates on datastores, or images, or video frames,...

casi 2 años ago | 0

Newton's Method error message
The variable x is not defined in w(n+1) = w(n) - (z(w(n))/dz(x(n)));

casi 2 años ago | 0

Convert Milliseconds to Clock time from excel file
Let X be the time in miliseconds. Xs = X/1000; % the total time in seconds Hour = floor(Xs/3600) ; % The number of hours in x...

casi 2 años ago | 0

How can I simulate data when I only know the derivative?
This is exactly how time-based simulations are done. You have the mathematical model of the system state derivative(s) (i.e. dx...

casi 2 años ago | 1

how do I give in this kind of transfer function in Simulink

casi 2 años ago | 0

I can not find an error in the expression
It's hard to say without seeing how the variables r, t, and p are defined. If r and p are vectors of different length, then the...

casi 2 años ago | 2

You can create almost anything you like. See the "user defined functions" tab in the library browser. You can use a "MATLAB fu...

casi 2 años ago | 0

| accepted

Matlab code for Euler method help
One thing that I notice is that you are defining N based on numel(T), but it looks like T is not yet defined, so what is the val...

casi 2 años ago | 0

What is the best way to find angles between these two lines?
The angle between vectors is determined using the vector dot product. Calculate the unit vectors and angles as follows: v1x ...

casi 2 años ago | 0

| accepted

Need technique to compare accuracy between different methods
As @darova suggests, if you have an analytical solution, then you can compare your numerical solution to the exact answer. This...

casi 2 años ago | 0

There is no reason that non-uniform breakpoint spacing should be causing an error with the 1D interpolation function. I think t...

casi 2 años ago | 0

| accepted

Question

What is the best way to insure that all of my functions are using the same constant values?
I want to make sure that my functions are all using the same values for physical constants, like earth radius, elipsoidal flatte...

alrededor de 2 años ago | 2 answers | 0

### 2

Why will these plots not plot on the same graph?
You need to turn on "hold" mode to plot more than one plot on the same axes. If you do not use hold, the next plot replaces the...

alrededor de 2 años ago | 0

Communication delay & jitter delay modelling
Here is my interpretation of what you are asking. It seems that this woud be very easy in Simulink. You have signal PT which i...

alrededor de 2 años ago | 0

Simulink switch that is based on probability
This seems to work for me (The uniform random number is set to a range of 0 to 1):

alrededor de 2 años ago | 0

| accepted

Rotating a coordinate with a rotation matrix
There seems to be some confusion regarding what the coordinate rotation transform is doing. One way to think about it is that i...

alrededor de 2 años ago | 1

| accepted

How can I position my textbox exact position in my plot?
Yes, this is possible to do, but it is complicated. When you place graphics in a figure window, they are located based on the f...

alrededor de 2 años ago | 1

| accepted

Call function by path or namespace?
One way to approach this is to create a separate folder (that is not on the Matlab path) for your project. When you set the Mat...

alrededor de 2 años ago | 0

Difference between a vector and a bus signal
A bus signal is like a C++ structure. It can contain a variety of different signal types. A vector is an array, all elements a...

alrededor de 2 años ago | 0

How to call .m file from an other .m file?
Use the command run(filename) Any variables defined in the script are available in the Matlab workspace.

alrededor de 2 años ago | 0