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Plotting the convolution of two signals
Define the signals and plot them syms t tau real u(t) = heaviside(t); x(t) = 5*(u(t+1)-u(t-1)); h(t) = u(t-1) - u(t-7); fig...
environ 20 heures il y a | 0
Question
Is it More Efficient to Load a Subset of Variables from a .mat File Rather than All of the Variables?
Suppose I have a .mat file and an application that only needs to use a subset of the variables in the .mat file. Option 1: s =...
2 jours il y a | 2 réponses | 1
2
réponsesHelp with tfest function. Resulting transfer function deviates from input on either side of freq range.
Hi Jared, Maybe look into the WeightingFilter opton of tfestOptions. I tried with 'inv' below and seemed to get a result more i...
5 jours il y a | 0
| A accepté
Question
Is rowfun Showing Strange Behavior when the Target Function Returns an Empty Output?
Define a function that echos a scalar input, unless the input is 3, which returns an empty row vector 1x0. function y = fun1(x)...
9 jours il y a | 2 réponses | 3
2
réponsesProblem making it past line 8 - no error given
It's probably just taking a very long time to compute the symbolic solution at each value of trange. One option, shown below, is...
15 jours il y a | 0
| A accepté
Does anyone know why no matter what I change, I cant get dsolve to work?
It works just fine here in R2026a and worked fine in 2024a. As well. When you run the code,do you get the exact same output as ...
19 jours il y a | 0
| A accepté
Question
How Does Symbolic Math Toolbox Define Differentiation of a Complex Function?
The doc page diff - Differentiate symbolic expression or function - MATLAB is essentially silent on how diff handles differentia...
20 jours il y a | 2 réponses | 1
2
réponsesQuestion
Why Does sym(cell) Not Return a Cell?
As far as I can tell, there is no documented behavior for calling sym with single input that's a cell. Nevertheless, if doing so...
24 jours il y a | 1 réponse | 0
1
réponseQuestion
Can Same Commands in Debugger and Command Window Exhibit Different Behavior?
I was debugging what I'm pretty sure is a bug (or at least an inconsistency) in @doc:subs and came across a behavior that I don'...
24 jours il y a | 1 réponse | 1
1
réponsehow to implement a non-causal system?
In general (but not always), causality of a linear, time invariant (LTI) system cannot be determined by inspection of the diffe...
environ un mois il y a | 0
Question
How Can Short-Circuiting Logical Operators &&, II be Overloaded in a Classdef?
Logical and - Find logical AND - MATLAB and logical or - Find logical OR - MATLAB can be overloaded for classes with functions "...
environ un mois il y a | 1 réponse | 1
1
réponseanonymous function with rng call inside
t = 2*(rand(1,1000)-0.5)*100; figure plot(t,f(t,10),'b.',t,f(t,10),'r.') function y = f(t,interval) tinterval = ceil(t/in...
environ un mois il y a | 0
Find symbolic solution with intermediate variables of a cubic equation
Check the "AbbreviateOutput" setting of sympref
environ un mois il y a | 0
| A accepté
Importing space-delimited files where there are spaces in data fields
T = readtable('timing_log.96278.txt',NumHeaderLines=4,VariableNamesLine=3); T(end-1:end,:) = []; T.description = strtrim(strin...
environ un mois il y a | 1
Two sided laplace transform
No, there is not, at least not directly. However, the two-sided Laplace transform of f(t) can be developed by expressing f(t) ...
environ 2 mois il y a | 0
Question
Is There a Way to Control Which Folders are Stored in the Drop Down History?
I have a workflow on Linux that needs to do lots of file i/o that goes something like this: 1. Store the originating folder wit...
2 mois il y a | 1 réponse | 0
1
réponsePossibility of Using a State-Space Actuator in a Robot Created with Simscape Multibody
Without more info ... I'm pretty sure the answer is yes. The output of the State Space block can be sent into the Simscape Multi...
2 mois il y a | 0
Why I do not see the correct transfer function
Hi Zeyuan, Is G1 defined correctly? If it is, or if stil having trouble after correcting it, it would be easier to help with a...
3 mois il y a | 0
| A accepté
Question
Why is vecnorm So Slow?
Why is vecnorm so much slower than the raw calculation and why does such difference increase as the input gets larger. I can see...
3 mois il y a | 1 réponse | 0
1
réponseQuestion
Does solve Return an Appropriate Solution for a System of Rational Equations?
Consider a system of equations with LHS being rational functions in two variables. syms x y g = (x-1)/(y-2) == 0; h = (y-2)/(...
3 mois il y a | 1 réponse | 2
0
réponseHelp using the toeplitz function
"-2 going to down the main diagonal and then 1 in the upper dioagonal and 1 in the lower diagonal." That's symmetric so only on...
3 mois il y a | 1
List all memoized function caches
mf1 = memoize(@func1); mf2 = memoize(@func2); for ii = 1:10,mf1(ii);mf2(ii);end clear mf1 mf2 mfs = struct(matlab.lang.inter...
3 mois il y a | 1
| A accepté
List all memoized function caches
Hi Matt, Is evalin acceptable? clearvars clearAllMemoizedCaches; mf1a = memoize(@func1); mf1b = memoize(@func1); mf2 = me...
3 mois il y a | 0
Make memoized function calls recognize equivalent input sequences (and so avoid redundant cache entries)
That's interesting and seems to suggest that the input argument list is saved off to some data structure (like a cell array?) be...
3 mois il y a | 1
| A accepté
Question
What's the Best Way to Convert a .mat File from -v4 format to -v7 Format?
Is there a better way than reading all of the data from the -v4 .mat file and then saving all of the data to a -v7? data = load...
4 mois il y a | 1 réponse | 0
1
réponseInnerjoin when a table contains user-defined objects
Hi Matt, I think the class defintion has to change so that the myclass constructor can accept zero arguments. I believe that w...
4 mois il y a | 0
| A accepté
Integral from a function that has a singularity
According to quadgk, for an integrand with a singularity we should "split the interval and add the results of separate integrati...
4 mois il y a | 0
Question
Does Matlab Take Full Advantage of the BLAS Routines?
It's my understanding that Matlab uses BLAS routines under the hood for many matrix algebra operations. Is that correct? If so,...
4 mois il y a | 1 réponse | 0
1
réponseMemoize an anonymous function with externally scoped variables
[Matt J added:] "... MATLAB® returns the associated cached output values if the following conditions are true. The input argum...
5 mois il y a | 1
| A accepté
Solution of ODE with Symbolic Math Toolbox.
Use rewrite to get the solution in terms of heaviside. syms("t", "positive") syms("T_1", "k_p", "positive") syms("u(t)", "y(t...
5 mois il y a | 0
| A accepté
