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Content Feed
How to interpret results of FFT/DFT?
By my calculations, if that sine wave is supposed to be 4.82 kHz, then the sampling frequency must be Fs = 1928000 Hz and the ...
environ 2 heures il y a | 0
Why results of the 'solve' are wrong?
Hi ruiheng, I would stay out of the double world to first make sure everything is working as expected. p_max=715.685424949238;...
environ 8 heures il y a | 0
Inverse Laplace plot error
Hi PTK, f1 is a symfun, so you could use fplot, or you could evaluate it at bunch of points and convert to double and the use p...
environ 23 heures il y a | 0
How to speed up a 2D interpolation in MATLAB?
A single call to interp2 should do the trick Position0 = 1:4; Velocity0 = 1:5; Output0 = Position0.' + Velocity0; RawPositio...
1 jour il y a | 0
Question
Should sinc() be Implemented with sinpi()?
Here are the relevant lines that implement sinc dbtype sinc.m 24:27 Should line 26 now be implemented with sinpi? If concerne...
2 jours il y a | 1 réponse | 0
1
réponseFRD MIMO plant closed loop control, incorrect response
Define the controller fs = 5000; ts = 1/fs; g = 0.5; wp = 76.9*2*pi; d = 0.3; den = [1/wp^2 2*d/wp 1]; Ctot = tf({0 0 0 0...
2 jours il y a | 0
periodogram for 200 Hz sample rate returns 129 array length
Hi sam, signal = linspace(0,3000,200)'; %this is 1 second of my signal (200 because that's the sample rate) [x,y] = periodogra...
2 jours il y a | 1
| A accepté
simulink add block wrong output
Hi 기범 I think the issue here is mixing together different fixed point data types. Using R2021b Here's the model, with the data...
3 jours il y a | 0
Generating signal from weibull distribution
Hi Davide, The functions wblpdf and wblrnd are both eligible for code generation, so you can call either from inside a Matlab F...
3 jours il y a | 0
Block callback function in Simulink model cannot access workspace variable when executed with parsim
Hi David, I think there is relatively straightforward solution to the original Question (I realize you found an alternative sol...
4 jours il y a | 0
Area in a normalpdf
x1 = [-4:.1:4]; y1 = normpdf(x1,0,1); x = [-4:0.1:-1.5]; plot(x1,y1) hold on area(x,normpdf(x,0,1)) See area for options ...
4 jours il y a | 0
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Trouble with MuPad when evaluating symfun at a symbolic variable instead of a number in MATLAB
Hi Nathaniel, I too could not figure out how to specify cond2 the way you want. A workaround would be to only specify cond1, a...
5 jours il y a | 0
| A accepté
Model stop function callback cannot recognise variable when running with parsim
Having all the variables in the base workspace, using sim('mymodel'), and using the StopFcn works fine because in that case Stop...
5 jours il y a | 0
Drawing a line through the peak of the plot
m = 4.48e-26; % mass of Nitrogen molecule k = 1.38e-23; % Boltzmann Constant p = 0:2800; ind = 1; for T = 300:500:1500; ...
6 jours il y a | 0
The real() command outputs a complex number (doesn't appear to change it).
In syms world, use isAlways to determine if an expression or variable is real, etc. syms x isAlways(in(x,'real')) assume(x,'r...
6 jours il y a | 2
Using Matlab perform the convolution of the following signals of different duration and energy
Hi Ali, Assuming S1, S2, and S3 are continuous-domain signals, I think it would be better to compute the convolution integral u...
7 jours il y a | 0
unexpected matlab operator error when plotting from a simulink matlab function
Hi Edoardo, Are you really trying to plot u vs. u? Wouldn't that just be a straight line? If I understand what you're trying ...
8 jours il y a | 0
Convert string array to numetric.
If the data only contains 0's and 1's .. data = [ "01" "01" "10" "10" ...
9 jours il y a | 1
What is the Memory Block actually useful for?
Hi Islam, Memory blocks are often used to remove algebraic loops. The doc talks about this concept, just do a search. Here's a ...
9 jours il y a | 1
| A accepté
Using Simulink from .m file
Ok. If F and Ma are constants, you should consider using a Constant block for each. Make the "Constant value" paramter F and Ma...
10 jours il y a | 1
| A accepté
Can MATLAB function blocks be set to run once per simulation instead of each time step if the outputs are used as inputs to a 1D look-up table?
That link includes three different solutions, not sure which one you're using. Having said that, not sure how the error message ...
10 jours il y a | 0
| A accepté
Zero order hold for signal reconstruction
Perhaps set the method input to interp1 to 'previous'.
10 jours il y a | 0
| A accepté
How to access the values of sym?
Not sure why feval is used. Just using solve with ReturnConditions solves for the range of b that satisfies both inequalities. ...
10 jours il y a | 0
Simulink SImulation Inputs and Model Variables
Instead of using the StopFcn, maybe you can use setPostSimFcn functionality
10 jours il y a | 0
| A accepté
How to extract number of matrices with all elements zero and the indexes of those matrices in a struct
Hi Abdullah, The Question use the term "cell" but it looks like the data only uses structures. If that's the case, then .... C...
10 jours il y a | 0
Finding the modulus margin for three different open loop systems through matlab?
Hi Yarno, I'm not aware of any function that will compute the modulus margin (which is too bad). But one way to get what should...
10 jours il y a | 0
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Sinusoidal Frequency Response of a Transfer Function
If the system were bounded-input-bounded-output (BIBO) stable, then the steady state output in response to input y(t) = A*sin(w*...
11 jours il y a | 0
cos block error (simulink)
Base Simulink doesn't have a block that implements functions cosd or cospi. Maybe some other toolbox does. If not, both of tho...
12 jours il y a | 0
I cannot call parameter value from workspace to Simulink matlab function block
Hi @mg Make the function like this: function y = AAA( var1,param1) BB= var1 CC = param1 * BB y=CC Then, follow t...
14 jours il y a | 0
Lsim function returns an array filled with Nan
Hi Gabriel, Recheck the model. As written it has two unstable poles way out in the right half plane. That will be very difficul...
14 jours il y a | 0