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immense difference between continous and discrete state space model
Do the responses of the open loop systems look similar? Just for your information, MATLAB's discrete integral and derivative ...

plus de 13 ans il y a | 0

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data loaded within function shown as NaN
Your A.m function (or script) edits/changes the B.mat data. At some point it changes some of the numbers to NaN. If you don't po...

plus de 13 ans il y a | 0

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Why all the plots from my program originate from (0,0).
The reason that usually simulink generated plots (out of scope) start from (0,0) is that the initial conditions of the Simulink ...

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How to transfer an output of gui to a text file
open your GUI in GUIDE and double click on the push button. You need to write a callback for that pushbutton. As the property in...

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Need help selecting the max of array A, then selecting corresponding array B
At the end of your code add these lines: [maxPE,index] = max(pe); countryNameMAX = cn(index) maxPE and countryNameMAX...

plus de 13 ans il y a | 0

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Simulink - PI Control Question - tuned output graph will not overshoot
Zoom in or out in your figure to see the oscillations. Also you may also need to change the total simulation time. Set it to ...

plus de 13 ans il y a | 0

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Counting values above a threshold within a matrix.
you can run the below function for each of your numbers: function num_of_1s = no1(n) if n==0 num_of_1s = ...

plus de 13 ans il y a | 0

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Solving systems of equations with "solve" function
Check the format of how to use "solve": <http://www.mathworks.com/help/symbolic/solve.html> you should choose a variable t...

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How to get rid of the zero decimal?
Type format short in the command window

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How can I change what parameters are visible in a masked block dialogue box?
When you are creating the mask, right click on the block and choose "edit MASK" then in the "Parameters" pane of the "Mask Edito...

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Path radius from lat/long data
You must be using the geographical coordinate system. It is same as the spherical coordinates. Here is the transformation to Car...

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Path radius from lat/long data
It depends your data are in 2D (x-y plane) or 3D (xyz plane). There are equations to find the radius of curvature for each ca...

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Help with 'solve' function in MATLAB for numerical solution!
After you get the symbolic solution "d", you may need to say: num_sol = vpa(d) which computes d with numbers provided bef...

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How to write the B-spline basis function?
Your function called, bspline_basis() calls a nested function called, bspline_basis_recurrence() and the nested function again c...

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Solving ODE becomes unstable when using a decaying signal
I had same problem before. Try deriving the "dimensionless" form of your equations and solve those. usually if you are solvi...

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How to draw a rotated ellipse without any toolbox?
t = linspace(0,2*pi,1000); theta0 = pi/6; a=2; b=1; x = a*sin(t+theta0); y = b*cos(t); plot(x,y) axis equal

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Is there any easy way to solve matrix differential equation?
The analytical solution to the problem of dp/dt = ip is p(t) = C exp(it) where C is a constant matrix same size as p used ...

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How to save specified data from a matrix?
if your matrix m is 100 by 1, you can do this: m(m<0.2) gives you a new matrix that is smaller or equal size to the orig...

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How to close a file outside of matlab？
Can fclose() close your file?

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error when the input is zero
If you set G = 0, then IL will be evaluated as 0. When IL = 0, then h = 0 and I = 0:h:IL which is I = []. And N = length(...

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How can I do to put on simulink a differential equation system like the one below?
what is da/dz? you mean derivative of a function a with respect to a space variable z? If this is the case then it is a PD...

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Which solver to use? I cannot get an answer, though I know there is one.
It seems that in yoru problem you ahve numerical value for all the variables and want to find L. To do so, I don't recommen...

plus de 13 ans il y a | 0

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how to throw out certain intervals.
Like this: for j=1:length(X)-1 if y>X(j) && y<X(j+1) % do ... end end

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Accessing cell array via factor/index
You need to use strcmp() to compare strings: for j=1:size(data,2) if strcmp(data{j,3},'fs') % do some stuff here for this...

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how to detect smile of a person ??
First you got to detect the line between the lips. After that you need to compute the arc angle of that line if it is caved towa...

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trying to parametrize code for 'solve' and 'syms' command
Use Z = trapz(X,Y)

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Solving an equation containing sine and cosine
A*cos(x)+B/sin(x)=C multiply both sides by sin(x) to get: A * sin(x)*cos(x) + B = C * sin(x) now use the following rel...

plus de 13 ans il y a | 2

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Why does this program return complex numbers?
I think the complex numbers come from the function log used in your code at line 0064. Note that the input of log function sh...

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Changing a function to take an input of cells rather than a matrix
All you need to do is to change all the occurances of data(.,.) in your function to data{.,.}. This way wherever you are accessi...

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Round to nearest odd integer
Not that I know of.. but you can use this: function y=fun(x) y = 2*floor(x/2)+1; end depending on what you want to do with t...

plus de 13 ans il y a | 8

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