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Is There Any Practical Difference Between Extraction and Deletion When Reducing a Vector?
By extraction, I mean % x = x(indexkeep); By deletion, I mean % x(indexdelete) = [] Is there any practical difference betw...
5 giorni fa | 2 risposte | 0
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rispostePlotting 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...
10 giorni fa | 0
Domanda
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 =...
12 giorni fa | 4 risposte | 1
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risposteHelp 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...
15 giorni fa | 0
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Domanda
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)...
18 giorni fa | 2 risposte | 3
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risposteProblem 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...
25 giorni fa | 0
| accettato
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 ...
29 giorni fa | 0
| accettato
Domanda
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...
29 giorni fa | 2 risposte | 1
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risposteDomanda
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...
circa un mese fa | 1 risposta | 0
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rispostaDomanda
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'...
circa un mese fa | 1 risposta | 1
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rispostahow 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...
circa un mese fa | 0
Domanda
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 "...
circa 2 mesi fa | 1 risposta | 1
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rispostaanonymous 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...
circa 2 mesi fa | 0
Find symbolic solution with intermediate variables of a cubic equation
Check the "AbbreviateOutput" setting of sympref
circa 2 mesi fa | 0
| accettato
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...
circa 2 mesi fa | 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) ...
circa 2 mesi fa | 0
Domanda
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 mesi fa | 1 risposta | 0
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rispostaPossibility 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...
3 mesi fa | 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 mesi fa | 0
| accettato
Domanda
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 mesi fa | 1 risposta | 0
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rispostaDomanda
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 mesi fa | 0 risposte | 2
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risposteHelp 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...
4 mesi fa | 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...
4 mesi fa | 1
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List all memoized function caches
Hi Matt, Is evalin acceptable? clearvars clearAllMemoizedCaches; mf1a = memoize(@func1); mf1b = memoize(@func1); mf2 = me...
4 mesi fa | 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...
4 mesi fa | 1
| accettato
Domanda
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 mesi fa | 1 risposta | 0
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rispostaInnerjoin 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 mesi fa | 0
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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 mesi fa | 0
Domanda
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 mesi fa | 1 risposta | 0
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rispostaMemoize 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 mesi fa | 1
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