How can I get plot with smooth lines from this data?

1 次查看(过去 30 天)
Hi.
I want to get plot with smoother lines from this data.
a=(500,1000,1700,1300,1400,3900,3400,3000,2200,2400,3300,3800,4500,4500,4400,4300,4600,3700)
x=(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18)
Thanks.

采纳的回答

Star Strider
Star Strider 2019-6-26
If you do not have the Curve Fitting Toolbox, use the core MATLAB spline (link) function:
a=[500,1000,1700,1300,1400,3900,3400,3000,2200,2400,3300,3800,4500,4500,4400,4300,4600,3700];
x=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18];
xsm = linspace(min(x), max(x));
asm = spline(x, a, xsm);
figure
plot(x, a, '+r')
hold on
plot(xsm, asm, '-b')
hold off
grid
How can I get plot with smooth lines from this data - 2019 06 26.png

更多回答(2 个)

KALYAN ACHARJYA
KALYAN ACHARJYA 2019-6-26
编辑:KALYAN ACHARJYA 2019-6-26
a=[500,1000,1700,1300,1400,3900,3400,3000,2200,2400,3300,3800,4500,4500,4400,4300,4600,3700]';
x=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18]';
f=fit(x,a,'smoothingspline')
plot(f);
kalyan_11.png
  5 个评论
KALYAN ACHARJYA
KALYAN ACHARJYA 2019-6-27
Have you have run the code, as provided (Copy and run)?
Can you show me the error?
Muhammad Taseer Islam
Oh sorry KALYAN ACHARJYA.
that was my mistake.
now it is working.
thank you u very much for your rapid reply.

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infinity
infinity 2019-6-26
Hello,
There is an option that you can refer,
a1 = smooth(a);
plot(x,a1)
There are many types of smooth function, you may read links below for more options.

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