Non numeric data X plot

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Tiago Araujo
Tiago Araujo 2021-4-17
评论： Tiago Araujo 2021-4-19
I need help to solve this plot:
syms X L
X = 0:L/16:L;
Y = 1 + 2*X;
plot (X,Y);
This is just an example, the function I am trying to solve is a bit complicated.

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Walter Roberson
Walter Roberson 2021-4-17
Ran in:
In this particular case, you can plot something meaningful. In most cases, you cannot plot with unresolved symbolic variables unless you use fplot() or fplot3() or fsurf() to have MATLAB automatically substitute specific numeric values for the unresolved values.
You cannot, for example, plot a family of curves expecting it to show you abstract curves such as "s", "s/2", "s/4", "3s/2" and so on. Plotting always requires that something replaces all symbolic variables with particular numeric values.
syms X L
X = 0:L/16:L;
Y = 1 + 2*X;
fplot3(L, X, Y, [0 20]); xlabel('L'); ylabel('X'); zlabel('Y');
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Walter Roberson
Walter Roberson 2021-4-18
编辑：Walter Roberson 2021-4-18
syms X L
X = 0:L/16:L;
for i=1:length(X)
Y(i) = 1 + 2*(X(i)/L);
end
figure
plot(X/L, Y);
xticklabels(string(sym(xticks)) + " L")
Tiago Araujo
Tiago Araujo 2021-4-19
Great man, you are great!!!
THANKS!

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