Variable not saving as a double

Hi All,

I need mutiple values for x for a range of t, it is only keeping the last variable, What do I do?

Here is my code

for t = 0:1:100

x = (0.5exp(2*sin(t)))/(10.5*exp(2*sin(t)));

end

Thank you

Answer 1

[Torsten]

You mean

t = 0:1:100;
x = 0.5*exp(2*sin(t))./(10.5*exp(2*sin(t)));
plot(t,x)

(which is equal to 0.5/10.5=0.04761... because exp(2*sin(t)) cancels out) ?

[Alice K]

Sorry there was a typo, this is my full code

I need to plot x againts M

t = 0:1:100;
u = 1;
v = 1;
A = 0.1
for t = 0:1:100
    x = (A.*exp(u.*sin(t)))/(1+A.*exp(u.*sin(t)))
end
M = (1+v.*cos(t).*A.*exp(u.*sin(t))+v.*cos(t)-1)/(1+A.*exp(u.*sin(t)));
figure
plot(M,x)

I am getting nothing on the graph.

[Walter Roberson]

You should avoid using the / operator, except possibly for the case of dividing by a literal constant. The / operator is not the division operator: it is the matrix division operator, with A/B being similar to A*pinv(B) or similar to least-squares regression. Use ./ for the division operator

I would suggest to you that in the cases where you really do want to use matrix division or matrix least-squares that instead of A/B that you use (B'\A')' instead -- the use of \ emphasizes the matrix operation.

t = 0:1:100;
u = 1;
v = 1;
A = 0.1

A = 0.1000

x = (A.*exp(u.*sin(t))) ./ (1+A.*exp(u.*sin(t)))

x = 1×101

0.0909 0.1883 0.1989 0.1033 0.0448 0.0369 0.0703 0.1617 0.2119 0.1312 0.0549 0.0355 0.0552 0.1321 0.2122 0.1608 0.0698 0.0368 0.0451 0.1041 0.1995 0.1876 0.0902 0.0411 0.0389 0.0805 0.1765 0.2065 0.1159 0.0490

M = (1+v.*cos(t).*A.*exp(u.*sin(t))+v.*cos(t)-1) ./ (1+A.*exp(u.*sin(t)));
figure
plot(M,x)

[Alice K]

It Works,

Amazing, Thank you