How can i solve?

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Liviu Iftime 2019-10-31

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https://ww2.mathworks.cn/matlabcentral/answers/488618-how-can-i-solve

评论： Shubham Gupta 2019-11-3

Hello, I'm new to matlab. I kind of like it and i have a project at university based on matlab. I'm kind of bad at programming but i want to learn.

So i have the following exercise to solve:

I need to make a square signal on multiple levels.

The period of every signal is 0.25 s and i have the following levels:

a) {-1,1}

b) {-3,-1,1,3}

c) {-5,-3,-1,1,3,5}

d){-7,-5,-3,-1,1,3,5,7}

I m sorry if this aren't the rules of the website but i'm kind of desperate. If someone can solve the d) {-7,-5,-3,-1,1,3,5,7} so i can inspire from that.

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Liviu Iftime 2019-10-31

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采纳的回答

Shubham Gupta 2019-11-1

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https://ww2.mathworks.cn/matlabcentral/answers/488618-how-can-i-solve#answer_399257

Below code worked for me :

rng default
tsim = 0:0.002:10; % simulation time
Amp = {-7,-5,-3,-1,1,3,5,7}; % Amplitudes
dt = 0.25; % sample time
randAmp = [Amp{floor(length(Amp)*rand(tsim(end)/dt,1))'+1}]; % randomize amplitude over simulation time
func = @(t)0; % initialize function
for i = 1:length(randAmp)
func = @(t)func(t)+((t-dt*(i-1))*(t-(dt-1e-10)*i)<=0)*randAmp(i); % check where 't' lies and decide amplitude accordingly
end
plot(tsim,arrayfun(func,tsim)) % plot the results

Let me know if you have doubts !

Well Thank you! I'm kind of confussed on what is that. I have managed to make myself the code and it has 140 lines. It's funny that you have in your code 10 lines, but as i said I have no ideea what is that code.

THANK YOU ANYWAYS!

Shubham Gupta 2019-11-3

I am glad I could help. If you can tell me which part of the code you didn't understand, maybe I can help you understand in more detail. Also if it solves the problem for you, you can consider to accept the answer cheers !

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