# Paul

**Statistics**

RANK**62**

of 273.103

REPUTAZIONE**2.481**

CONTRIBUTI

**66** Domande

**940** Risposte

ACCETTAZIONE DELLE RISPOSTE **
40.91%
**

VOTI RICEVUTI**294**

CONTRIBUTI**0 Post**

CONTRIBUTI**0** Pubblico Canali

VALUTAZIONE MEDIA

CONTRIBUTI**0** Punti principali

NUMERO MEDIO DI LIKE

**Content Feed**

Problem with undefined function

logncdf is a function in the Statistics and Machine Learning Toolbox. That toolbox needs to be installed and it will have to be...

1 giorno fa | 0

Solve 1D equation in simulink

Hi gdz, Assuming vpasolve needed because a closed form solution can't be found .... Can always try using an Algebraic Constrai...

2 giorni fa | 0

| accettato

How to simply rearrange a symbolic equation to get an expression for one variable in terms of others

Not sure about solve, but isolate seems to work syms x(t) a eqn1 = x(t) == a + x(t)/2; isolate(eqn1,x(t))

2 giorni fa | 0

| accettato

Extract operations from symbolic expression

Hi Cedric What's the objection to using a Matlab Function block? If that wasn't a constraint, you could use matlabFunctionBlock...

3 giorni fa | 0

A question about SkyHogg model in Aerospace Blockset

Hi Islam I agree with your equation for alphadot, but not the notation. By standard convention (at least what I'm familiary wit...

3 giorni fa | 0

How to solve optimization problems when the objective function includes a symbolic function

Hi @NJ2Cali I was able to get fmincon to run to completion using an objective function that uses syms. I changed Func2 to some...

4 giorni fa | 0

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 ...

4 giorni fa | 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;...

5 giorni fa | 1

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...

5 giorni fa | 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...

6 giorni fa | 0

| accettato

Domanda

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...

6 giorni fa | 1 risposta | 0

### 1

rispostaFRD 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...

6 giorni fa | 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...

6 giorni fa | 1

| accettato

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...

7 giorni fa | 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...

7 giorni fa | 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...

8 giorni fa | 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 ...

9 giorni fa | 0

| accettato

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...

9 giorni fa | 0

| accettato

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...

10 giorni fa | 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; ...

10 giorni fa | 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...

10 giorni fa | 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...

11 giorni fa | 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 ...

12 giorni fa | 0

Convert string array to numetric.

If the data only contains 0's and 1's .. data = [ "01" "01" "10" "10" ...

13 giorni fa | 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 ...

13 giorni fa | 1

| accettato

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...

14 giorni fa | 1

| accettato

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 ...

14 giorni fa | 0

| accettato

Zero order hold for signal reconstruction

Perhaps set the method input to interp1 to 'previous'.

14 giorni fa | 0

| accettato

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. ...

15 giorni fa | 0

Simulink SImulation Inputs and Model Variables

Instead of using the StopFcn, maybe you can use setPostSimFcn functionality

15 giorni fa | 0

| accettato