How to generate random function with respect to time ??

Question

Moataz Mohsen 2015-3-30

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https://ww2.mathworks.cn/matlabcentral/answers/195239-how-to-generate-random-function-with-respect-to-time

评论： Thomas Koelen 2015-3-30

How to generate random function with respect to time knowing that the magnitude limit and time duration is predefined ????

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Michael Haderlein 2015-3-30

What do you mean with random function with respect to time?

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Answer 1

Thomas Koelen 2015-3-30

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https://ww2.mathworks.cn/matlabcentral/answers/195239-how-to-generate-random-function-with-respect-to-time#answer_173233

在 MATLAB Online 中打开

clc
clear all
close all
sf=50;
time=60;
mag=1;
S=zeros(1,sf*time);
for iT=1:length(S)
S(iT)=-mag+2*rand*mag;
end

where sf is your sample frequency, time is your time, and mag is your magnitude. S is the signal.

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Moataz Mohsen 2015-3-30

I want for example to generate random Power magnitudes for 2 hours time duration. So I can get at time equal 4 min. and 30 second the power is equal 50 Watt (for example)...........Is this work ?? and what is iT referring to ???

Thomas Koelen 2015-3-30

so you change your time to 7200, your mag to 50. you might want to change mag+2*rand*mag to just rand*mag since you are talking about power. if you want to look what the power was at that time you simply do: S(4.5*60).

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Answer 2

Mahdiyar 2015-3-30

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There are many random function that you may use, such as randperm, randi and so on. Can you explore more what you want to implement?

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Moataz Mohsen 2015-3-30

I want for example to generate random Power magnitudes for 2 hours time duration. So I can get at time equal 4 min. and 30 second the power is equal 50 Watt (for example)

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