suggestions on generating periodic decaying exponential signal

Hi, i am trying to generate a periodic decaying exponential signal in the time interval between -5 and 100 . I am trying to visualize it like a sawtooth waveform (but reversed and having gradual decay). can someone help me with this

t=-5:t_step:100;

bt_new=0;

L=0.018;

t_step=0.1221;

N= L/t_step;

for l=0:2.0930e-03:N

    bt = exp(-0.24*((t-(l.*ones(size(t))*t_step))));

    bt_new =bt_new+bt;

end

plot (t,bt_new);

I am trying to generate a periodic decaying exponential, any ideas

Answer 1

[bym]

is this close to what you want?

clear;clc
t = -5:.1:100;
plot(t,fliplr(sawtooth(t)).*exp(-t./20))

[Neels]

Thanks for the response. the answer is close to what i expected. But basically i want an periodically decaying exponential signal (whose amplitude varies between 1 and 0).

but while using a sawtooth waveform the amplitude extends from -1 to 1. I want to manipulate the amplitude. Do you have any suggestions

[Walter Roberson]

add 1, divide the result by 2.