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# Paul Hoffrichter

##### Last seen: 1 día ago
96 total contributions since 2020

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Keep a temporary variable after parfor
>> Parfor loop works when i comment out the plotting parts of the code. I tried what you said and only experienced what you wro...

8 días ago | 0

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how to fix Warning: Imaginary parts of complex X and/or Y arguments ignored
If you have a negative number raised to a non-integer power, you can sometimes get a complex number. Take a look at: https://ww...

13 días ago | 0

Solving a simple equation
Sorry, no idea if this is right. clc, clearvars %Angle = B %Thickness = u %Inner Radius = p %Developed length = L %L = L1+...

13 días ago | 0

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Question

Convert near zero complex parts to 0
In R2020a, I took a complex vector and converted near zero parts to zero. It took two long lines to do it. Can it be done in one...

14 días ago | 1 answer | 0

### 1

What am I doing wrong here? I am trying to recreate following highlighted equations in the table.
clc; clear; clf ep = linspace(0,1); m1 = 1.5; m2 = 3.8; ep0= 1; alpha = 0.785; epp = 0.11; qep = (2.76*ep.*cosh((3*ep)-1.92)...

19 días ago | 0

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I am expecting that you will get the following: >> which essai 'essai' not found. Write down the folder where your essai.m fi...

20 días ago | 0

Obtaining the envelope of AM signal using hilbert transform
In general, if you increase the carrier frequency, you will get a better envelope. Specific to your figure, to remove the rippl...

20 días ago | 0

computing vectors with string and numbers (easy question)
Here is code that keeps the indexing scheme based upon the order in which the names occur in your vector of strings. >> S = ["H...

20 días ago | 1

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computing vectors with string and numbers (easy question)
>> S = ["joe" "april" "andrea" "joe" "andrea"] S = 1×5 string array "joe" "april" "andrea" "joe" "andrea" ...

21 días ago | 0

Simulating a drone and bird as radar targets
Sounds like a good project. Personally, I would take a movie of a bird and a drone, and then try to reconstruct a 3D polygon of ...

alrededor de 1 mes ago | 0

How to generate a list of random ID which can later be used instead of participant name?
Due to the cyclist remark about homework, I am just starting the script. It leaves out certain patterns like 'a9a9' since it is ...

alrededor de 1 mes ago | 0

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Syntax Question, Why does this equal zero?
Good question. :) >> 1 - 7*( sym(8/7) - 1 ) ans = 0 % you are right; the answer is 0 For double numbers, look at the format...

alrededor de 1 mes ago | 1

Forcing Page Breaks in MATLAB
The official 2016 answer is here, and no discernible updates since 2016. It would be great if MathWorks would add that to Live E...

alrededor de 2 meses ago | 0

how to get the mean for specific rows number of one columns
M = [ ... 1 5 2 7 3 9 1 9 2 7 3 9 ]; T = array2table( M, ... 'VariableNames',{'Month','...

alrededor de 2 meses ago | 0

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Vector. Change the way my program gives me the answer.
v = [1 2 -3 4]; v( diff( sign( [v(1) v] ) ) ~= 0 ) ans = -3 4

alrededor de 2 meses ago | 1

Vector. Change the way my program gives me the answer.
v = [1 2 -3 4]; n = 1; l = length (v); ii = 1; c = []; while (n < l) a = v(n); b = v(n+1); n = n+1; % if (a <...

alrededor de 2 meses ago | 1

Group data in bins
Hope this is close to what you are looking for. EDGES' ans = 0 0.5000 1.0000 1.5000 2.0000 ...

alrededor de 2 meses ago | 0

How to solve matrix function in Matlab?
Define Z = AXB + C - X You have to start off with your initial best guess for X based upon the nature of the model. For lack of...

alrededor de 2 meses ago | 1

Creating blocks of average values from a series but avoiding dynamic variable names
Since you have 5 groups of 100 numbers, I thought you wanted the mean of each group. That gives 5 means. So I did not understand...

alrededor de 2 meses ago | 1

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plot discrete time domain signals
I recommend using following substitutions: plot(t,y) axis( [-1 10 0 1])

2 meses ago | 0

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Solved

Longest run of consecutive numbers
Given a vector a, find the number(s) that is/are repeated consecutively most often. For example, if you have a = [1 2 2 2 1 ...

2 meses ago

Imbedded If statement in Function help!
Did you know that >> logical(1) + logical(1) ans = 2 and that (age>50) is a logical?

2 meses ago | 1

In Online Matlab under App menu, Signal Analyzer not working?
The Signal Analyzer app comes with a purchase of the Signal Processing Toolbox. Please review this short video: Signal Analysi...

2 meses ago | 0

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Computer to boost MATLAB operation
As @Jan pointed out, it is very important that you run your profiler to find out where your time is being spent and focus on tho...

2 meses ago | 2

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Parfor nested loop Table definition
>> can I at least parallelise the writing of the 4 xlsx tables to speed up the code I do not see how to do that easily without ...

2 meses ago | 1

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How to obtain the first and second derivative of the "xt" function
You can use diff function as a crude way to take derivates. But, you should also know that diff introduces noise. Here is an art...

2 meses ago | 0

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Computer to boost MATLAB operation
Where is your time being spent - in the nested loop, or in the last loop that is outside the nested loop? If, by "last loop", y...

2 meses ago | 0

Giving a moving point a chance to change path every step?
You should just run the script directly. You should not try to call selectPath from the command line.

2 meses ago | 1

Giving a moving point a chance to change path every step?
Not sure exactly what you want, but possibly this is getting close. The refactoring should make it easier to modify. % set rand...

2 meses ago | 1

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