Plot a graph

Hi,

I have

 t=0:0.01:10
 x=a*t 
 y=sin(x)

and a has two values a=2, a=3

I want to plot (x, y) with two values of a in the same loop. Thanks in advance

Answer 1

[Sean de Wolski]

t=0:0.01:10;
a = [2 3];
x=a'*t;
y=sin(x);
plot(x',y')

[zina ben]

thinks,

but if a is un input and it can take any value what can i do

[Sean de Wolski]

rewrite it as a function that takes a row vector a...

or if it takes a column vector a, you can skip the transpose in the calculation of x.

[zina ben]

but i need the graphe for each one value of a in the same figure

[Sean de Wolski]

This answer had that...

[Walter Roberson]

Yes, Sean's solution should work just fine, and it is worth eventually studying how it works. It is a more advanced and less technique. But first you should study "hold on" as you will use that more in practice.

Answer 2

[Walter Roberson]

t = 0 : 0.01 : 10
for a = 2 : 3
  x = a .* t;
  y = sin(x);
  plot(x, y);
  hold on     % <---- THIS
end

Which is the same solution you were told in your two previous questions on the same topic.

[zina ben]

thinks,

It is a simple idea

[Walter Roberson]

If you have a vector of inputs stored in "a", then

t = 0 : 0.01 : 10;

for thisa = a

x = thisa .* t;

y = sin(x);

plot(x, y);

hold on % <---- THIS

end

[zina ben]

But if i write a= input ('a')

and i chose any value of( a), after i need plot different graph with different value of( a )in the same figure