How to create a periodic function?

Hi everyone,

I have created a function g_3 which looks like:

t=linspace(-2,2);
g_3=[];
for i=1:length(t)
    if abs(t(i))<=1
        g_3(i)=1-abs(t(i));
    else
        g_3(i)=0;
    end
end

Now I want to do it periodic with periode 4. How can I do it?

[Rayan]

[lp_min,lp_minIdx]=min(lp)
[lp_max,lp_maxIdx]=max(lp)
lp_diff=lpmax-lpmin
disp(lp_diff)

hoch=lastprofile>500
niedrig=lastprofile<=150
anzahlHoch=nnz(hoch)
anzahlNiedrig=nnz(niedrig)

[c,S,mu]=polyfit(x,y,11)
xNeu=570:670
yNeu=polyval(c,xNeu,S,mu)
yNeu=yNeu(:)'

[Rayan]

function r = compare_numbers(a,b)
if  a>b
    r ='greater'
elseif a<b
    r ='smaller'
else a==b
    r ='equal'
end

[Rayan]

schaltjahre = 1904:4:2000

anzahlJahre = length(schaltjahre)

stunden = 1:24:8760

anzahlStunden = length(stunden)

jahr = 1:364

wochen = reshape(jahr,7,52)'

jahre = 1900:2000

schaltjahre = mod(jahre,4) == 0 & mod(jahre,100) ~= 0 | mod(jahre,400) == 0

schaltjahreidx = jahre(schaltjahre)

eingabe = [10 20 30 40 50 60 70 80 90 100]

a = length(eingabe)

b = a/2

ausgabe = reshape(eingabe,2,b)

eingabe = [10 20 30 40 50 60 70 80 90 100]

jederZweite = eingabe(2:2:end)

jederZweite(end)= NaN

f = 5

t = 0:0.1:10

s = sin(2*pi*f)*t

lastprofile = [1:120]

lp_min = min(lastprofile,[],2)

lp_max = max(lastprofile,[],2 )

lp_diff = lp_max - lp_min

disp(lp_diff)

lastprofile = [1:500]

[lp_min,lp_minIdx] = min(lastprofile)

[lp_max,lp_maxIdx] = max(lastprofile)

lp_diff = lp_max - lp_min

disp(lp_diff)

Lastprofile = [123 4894 213 490 9 4456]

hoch = Lastprofile > 500

niedrig = Lastprofile <= 150

anzahlHoch = nnz (hoch)

anzahlNiedrig = nnz (niedrig)

function win = compare_numbers(a,b)

if a > b

win = 'greater'

elseif a < b

win = 'smaller'

else a == b

win = 'equal'

end

end

Answer 1

[Ameer Hamza]

You can use repmat()

t=linspace(-2,2);
g_3=zeros(size(t)); % pre-allocating memory (efficient code)
for i=1:length(t)
    if abs(t(i))<=1
        g_3(i)=1-abs(t(i));
    else
        g_3(i)=0;
    end
end

G_3 = repmat(g_3, 1, 10);
T = linspace(-2, 4*10, 100*10);

plot(T, G_3)

[Klaudjo Aliaj]

Thank you very much, that´s exactly what I was looking for :)

[Ameer Hamza]

I am glad to be of help!