How can I plot a function?

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Ioannis Filippidis
评论： Ioannis Filippidis 2021-4-8
Hello everybody,
I am new in Matlab (student) and i m trying to plot this:
x=1:5:800;
y=@(x)4*3.14*28*10^9*x/(3*10^8);
plot (x,y)
But when i run it shows me this:
Error using plot
Invalid data argument.
Error in freespace (line 3)
plot (x,y)
What am i doing wrong?
Sorry for my english

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回答（1 个）

DGM
DGM 2021-4-8
Try this:
x=1:5:800;
y=@(x) 4*pi*28*10^9 * x/(3*10^8); %i'm assuming you want pi there
plot(x,y(x)) % use it as a function

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