0 个投票

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

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Sean de Wolski
Sean de Wolski 2012-2-3

0 个投票

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

5 个评论
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zina ben
zina ben 2012-2-3
thinks,
but if a is un input and it can take any value what can i do
Sean de Wolski
Sean de Wolski 2012-2-3
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
zina ben 2012-2-3
but i need the graphe for each one value of a in the same figure
Sean de Wolski
Sean de Wolski 2012-2-3
This answer had that...
Walter Roberson
Walter Roberson 2012-2-3
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.

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更多回答（1 个）

Walter Roberson
Walter Roberson 2012-2-3

0 个投票

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.

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zina ben
zina ben 2012-2-3
thinks,
It is a simple idea
Walter Roberson
Walter Roberson 2012-2-3
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
zina ben 2012-2-3
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

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