Question

Why this piece of code gives error?
When I run the following code, it gives me error on line 19. The code is: clear;clc; c = 3e8; % signal propagation spee...

presque 2 ans il y a | 1 réponse | 0

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Question

Why the 2nd code does not behave like the 1st code?
In the attached code of "myfunAskMathworks.m", yo and ye both are of the order 36x1 and these are correct. But in the other atta...

presque 2 ans il y a | 2 réponses | 0

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Question

Is there a way to reduce execution time of the following because it took 6 hours and still is executing?
I have attached a file 'main.m'. I started to run main.m at 1:50pm today and still its going on executing and I don't know when ...

environ 2 ans il y a | 1 réponse | 0

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Question

Why this code says unrecognized function u?
I had a GA code which was generated by GA in earlier MATLAB version. But I had used there global variables. Later on, I replaced...

environ 2 ans il y a | 1 réponse | 0

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Question

Why does this code give error?
I want to implenet timeit() function to find the machine time for the execution of the m-file 'fpa1.m'. But when I run the attac...

environ 2 ans il y a | 1 réponse | 0

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Question

why estimating 3 values takes longer time than estimating 4 values?
In the attached code, when we estimate 2 values of u, it takes less time than the case where we estimate 3 values of u? It seems...

environ 2 ans il y a | 1 réponse | 0

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Question

How to find the total memory used during the execution of the code?
To find the efficiency of my algorithm, I searched this site: URL: https://www.kdnuggets.com/2022/09/calculate-algorithm-effici...

environ 2 ans il y a | 2 réponses | 0

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Question

How to find the efficiency of an algorithm?
I have an algorithm fpa1. How can I find its efficiency? All the required files are in the attachment. You can run the main file...

environ 2 ans il y a | 1 réponse | 0

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Question

How can we reduce the execution time of this whole code?
I want to minimize the "execution time" of the code given in the attachment. You can run the m file "main".

environ 2 ans il y a | 1 réponse | 0

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Question

Why legend is not displayed?
How can I display the legend at my desired side outside the figure? I run the following code but it doesn't work: clear all; cl...

environ 2 ans il y a | 1 réponse | 0

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Question

How to display a message as flashing and in my desired color and font size?
I want to display the following message in flashing and in my desired color and font size: " Yes, the error is the same " I ...

environ 2 ans il y a | 2 réponses | 0

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Question

How to remove all for-loops with vectorization?
I have the following piece of code. I have posted similar codes earlier also and therefore 1st I tried myself to vectorize it bu...

environ 2 ans il y a | 1 réponse | 0

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Question

How to replace all row vectors except 1st according to the difference?
I have a matrix named as 'two' of size 100 x 4. I have also a singe row vector u=[-55 55 65 -65]; Let we find the error ...

environ 2 ans il y a | 1 réponse | 0

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Question

How to replace the array data in workspace data?
I have three Mat files namely '2sn0dB.mat', '3sn0dB.mat' and '4sn0dB.mat'. All of them have array 0f size 100 x 1 and having sam...

environ 2 ans il y a | 1 réponse | 0

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Question

How to replace the values of a vector from desired location to its end?
I have three vectors a, b and c given below. I want to replace all the values of 'a' from my desired location say for example fr...

environ 2 ans il y a | 2 réponses | 0

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Question

How to arrange a matrix in descending order w.r.t rows?
If we have a large matrix and we want to arrange it in descending order i.e., the largest row shoud come on top, then 2nd larges...

environ 2 ans il y a | 2 réponses | 0

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Question

How to find the vector b if we know the RMSE?
If we have two vectors given by: a=[3,6,8,20,35,45]; b=[3.0343, 6.2725, 8.5846, 18.3781, 34.2025, 44.9699]; Then its Mean Squ...

environ 2 ans il y a | 2 réponses | 0

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Question

How to replace all for-loops ?
I had posted a function here for vectorization. Now this is the same function and even I tried myself to replace all for-loops l...

environ 2 ans il y a | 1 réponse | 0

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Question

How to recover Mat data?
I had saved my worksapce data with the name 'abc'. This had many variables some of which were scalars and some of which were vec...

environ 2 ans il y a | 1 réponse | 0

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Question

I don't understand why does it give error?
I downloaded the following code from Mathworks site whose URL is : URL: https://www.mathworks.com/matlabcentral/fileexchange/52...

environ 2 ans il y a | 1 réponse | 0

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Question

How to vectorize this piece of code by replacing all the for-loops?
I want to vectorize the following piece of code so that it becomes fast. But M and N can be only coprime numbers and N < M alway...

environ 2 ans il y a | 2 réponses | 0

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Question

How to reduce its execution time and why the value of e is a column vector?
I have the following piece of code. clc;clear all; c = 340; f = 3400; d = c/f/2; T = 1; ...

environ 2 ans il y a | 2 réponses | 0

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Question

how to reduce its computing time?
u=[30 40 50 70]; b=u; [~,C]=size(b); P=C/2; M=10; xo=zeros(1,M); yo=zeros(1,M); zo=zeros(1,M); for k=1:M for i=1:...

environ 2 ans il y a | 1 réponse | 0

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Question

Why does it give wrong answer?
I took a code from the Mathworks site given below: URL: https://www.mathworks.com/help/phased/ref/rootmusicdoa.html N = 10; d...

environ 2 ans il y a | 1 réponse | 0

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Question

Why this code gives error on line 47?
I downloaded the code attached from the following URL of Mathworks site: URL: https://www.mathworks.com/matlabcentral/fileexcha...

environ 2 ans il y a | 1 réponse | 0

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Question

How to reduce its execution time?
I have the following piece of code. It works but takes time. How can we reduce its time to a very minimum value? u=[1 3 5 7 20 ...

environ 2 ans il y a | 2 réponses | 0

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Question

Same code but different results-very strange?
I asked a question on December 10, 2022 on this forum. The URL of the question is: https://www.mathworks.com/matlabcentral/answ...

environ 2 ans il y a | 1 réponse | 0

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Question

How to invoke and use GA tool in Matlab R2022b?
I typed optimtool in Matlab R2022b to invoke the GA Tool but its' not there. Can anybody guide me how to invoke and use GA tool ...

environ 2 ans il y a | 1 réponse | 0

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Question

How to copy data of one or more variables from one Mat file to another Math file?
I have two Mat files namely 2sn20 and 2sn20Vectorized. They have data of different variables. Some of them are scalars and some ...

environ 2 ans il y a | 2 réponses | 0

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Question

How to vectorize this piece of code and why doesn't e come out to be zero though it must come out to be zero because u and b are equal?
u=[30 50 75 -30 -50 -75]; b=u; Noise=5; M = 6;%Constant1 N = 6;%Constant2 d = 0.5;%Constant3 K = length(u)/2; %Cons...

environ 2 ans il y a | 2 réponses | 0

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