I want to plot a line but got a curve

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Jiaqi Wang
Jiaqi Wang 2020-8-21
评论： Jiaqi Wang 2020-8-21
In my data, t = (0:0.01:0.64)', a is a colunm of constants (-9.81) of length 63. I want to plot a vs. t. It's supposed to be a horizontal line, but I got a graph with fluctuations around -9.81. How can I fix this? I used this code:
plot(t(1:length(a)),a)
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Jiaqi Wang
Jiaqi Wang 2020-8-21
Thank you! I think the problem was the calculation kept a long format of the answer of a, which resulted in a minor difference in a.

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采纳的回答

KSSV
KSSV 2020-8-21
t = (0:0.01:0.64)' ;
a = -9.81*ones(size(t)) ;
plot(t,a)

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Alan Stevens
Alan Stevens 2020-8-21
Just
t = (0:0.01:0.64)';
a = -9.81*ones(size(t));
plot(t,a)
gives a horizontal line.

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