How to plot a trapezoidal pulse in Matlab?

I want to plot a trapezoidal pulse that has user defined rise time and fall time i.e. slope of the edges of the trapezoid can be set by me.

[Jasmine]

Have you already started to write any code for this? If so could you upload it please.

[Jasmine]

function [] = trapezoidal_pulse (rise_time, fall_time, height, length)

pulse = zeros (2, 4);

pulse(1,2)=height;

pulse(2,2)=rise_time;

pulse(1,3)=height;

pulse(2,3)=pulse(2,2)+length;

pulse(2,4)=pulse(2,3)+fall_time;

plot(pulse(2,:),pulse(1,:))

Was this the sort of thing you were looking for? You could still improve this further by asking the user for a start time for the pulse (this currently assumes the pulse starts at t=0) and an end time if this wants to be after the pulse finishes. Also you could implement a GUI as a nice way to ask the user for inputs. Of course the plot can be improved with a title and axis labels. Hope this helps.

[ANWESHA]

Yes..this is what i exactly wanted. Thank u so much. Can you please explain me how is it working??

[Jasmine]

You're welcome. If you need any help on adding any of the extras I mentioned just let me know by commenting here again. I'll re-write my comment as an answer so that you can accept it :)

[ANWESHA]

Can you please explain me how it is working, so that I can modify it according to my need. Actually i have to plot it with respect to time and continuous pulse so that it is the reverse in the next period of time like in the image given below

[Nur Izzati Aliah]

Name = 'Pizza_Hut_Service';

Type = 'Mamdani';

Version = 2.0;

NumInputs = 2;

NumOutputs = 0;

NumRules = 0;

AndMethod = 'min';

OrMethod = 'max';

ImpMethod = 'min';

AggMethod = 'max';

DefuzzMethod = 'centroid';

Name = 'Arrival_Rate';

Range = [0 1];

x = [1 3 4 6];

NumMFs = 1;

MF1 = 'MF':'trapmf';[1 3 4 6]

MF1 = trapmf(x,[1 3 4 6]);

Can someone help with this to get the graph in trapezoidal graph? This is very urgent I really need help from all of you

Answer 1

[Jasmine]

function [] = trapezoidal_pulse (rise_time, fall_time, height, length)

pulse = zeros (2, 4);

pulse(1,2)=height;

pulse(2,2)=rise_time;

pulse(1,3)=height;

pulse(2,3)=pulse(2,2)+length;

pulse(2,4)=pulse(2,3)+fall_time;

plot(pulse(2,:),pulse(1,:))

[ANWESHA]

or may be like this one.

[Jasmine]

I have managed to make it work for up to 2 cycles...

function [] = trapezoidal_pulse (initial_height, on_height, delay_time, rise_time, fall_time, time_on, period, cycles)

pulse(:,1) = [initial_height,0];
pulse(:,2) = [initial_height,delay_time];
pulse(:,3) = [on_height,pulse(2,2)+rise_time];
pulse(:,4) = [on_height,pulse(2,3)+time_on];
pulse(:,5) = [initial_height,pulse(2,4)+fall_time];
pulse(:,6) = [initial_height,period];

for i=2:cycles
    pulse(:,3+(2*i)) = [initial_height,period*(i-1)];
    pulse(:,4+(2*i)) = [initial_height,pulse(2,3+(2*i))+delay_time];
    pulse(:,5+(2*i)) = [on_height,pulse(2,4+(2*i))+rise_time];
    pulse(:,6+(2*i)) = [on_height,pulse(2,5+(2*i))+time_on];
    pulse(:,7+(2*i)) = [initial_height,pulse(2,6+(2*i))+fall_time];
    pulse(:,8+(2*i)) = [initial_height,period*i];
end

plot(pulse(2,:),pulse(1,:))

[ANWESHA]

thank u so much

Answer 2

[ANWESHA]

Can please anyone help me to draw the pulse in matlab as given in the figure above?

Answer 3

[vartan]

This code should work for more than 2 cycles..

   function [] = trap (initial_height, on_height, delay_time, rise_time, fall_time, time_on, period, cycles)

pulse(:,1) = [initial_height,0];
pulse(:,2) = [initial_height,delay_time];
pulse(:,3) = [on_height,pulse(2,2)+rise_time];
pulse(:,4) = [on_height,pulse(2,3)+time_on];
pulse(:,5) = [initial_height,pulse(2,4)+fall_time];
pulse(:,6) = [initial_height,period];

for i=2:cycles
    pulse(:,1+(6*(i-1))) = [initial_height,period*(i-1)];
    pulse(:,2+(6*(i-1))) = [initial_height,pulse(2,1+(6*(i-1)))+delay_time];
    pulse(:,3+(6*(i-1))) = [on_height,pulse(2,2+(6*(i-1)))+rise_time];
    pulse(:,4+(6*(i-1))) = [on_height,pulse(2,3+6*(i-1))+time_on];
    pulse(:,5+(6*(i-1))) = [initial_height,pulse(2,4+6*(i-1))+fall_time];
    pulse(:,6+(6*(i-1))) = [initial_height,period*i];
end

plot(pulse(2,:),pulse(1,:))

example:

trap (0, 1, 0, 1e-1, 1e-1,1 , 2, 5)

Answer 4

[Jhon Lasso]

buen dia necesito hacer un trapezoide en matlab en 2d como lo hago?

Answer 5

[Seungmin Lee]

i try to above same code...but the function code is error.

how to solve the problem...

function []= trap (0, 1, 0, 1e-1, 1e-1,1 , 2, 5,4)

pulse(:,1) = [initial_height,0];
pulse(:,2) = [initial_height,delay_time];
pulse(:,3) = [on_height,pulse(2,2)+rise_time];
pulse(:,4) = [on_height,pulse(2,3)+time_on];
pulse(:,5) = [initial_height,pulse(2,4)+fall_time];
pulse(:,6) = [initial_height,period];
for i=2:cycles
    pulse(:,1+(6*(i-1))) = [initial_height,period*(i-1)];
    pulse(:,2+(6*(i-1))) = [initial_height,pulse(2,1+(6*(i-1)))+delay_time];
    pulse(:,3+(6*(i-1))) = [on_height,pulse(2,2+(6*(i-1)))+rise_time];
    pulse(:,4+(6*(i-1))) = [on_height,pulse(2,3+6*(i-1))+time_on];
    pulse(:,5+(6*(i-1))) = [initial_height,pulse(2,4+6*(i-1))+fall_time];
    pulse(:,6+(6*(i-1))) = [initial_height,period*i];
end
plot(pulse(2,:),pulse(1,:))