why there is only one value at my plot

2020 6 9
1 个回答
更新时间：2020 6 12
7 次查看（30 天）

0 个投票

syms t
t = 0:0.1:15;
a = ((30-30.*exp(-2.*t)).*(30.*t+15.*exp(-2.*t)+35))/(sqrt(490000-(30.*t+15.*exp(-2.*t)+35).^2));
plot(t,a)
here is my code. it just calculate a for t=15 and just show it on plot. i am new in matlab. could you help me?

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回答（1 个）

Tommy
Tommy 2020-6-9

2 个投票

Without the below period, MATLAB is performing right matrix division on two 1x151 vectors, resulting in a scalar value.
t = 0:0.1:15;
a = ((30-30.*exp(-2.*t)).*(30.*t+15.*exp(-2.*t)+35))./(sqrt(490000-(30.*t+15.*exp(-2.*t)+35).^2));
% ^ period added here
plot(t,a)

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