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

Question

Muhammad Taseer Islam 2019-6-26

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/468993-how-can-i-get-plot-with-smooth-lines-from-this-data

评论： Muhammad Taseer Islam 2019-6-27

采纳的回答： Star Strider

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.

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Answer 1

Star Strider 2019-6-26

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/468993-how-can-i-get-plot-with-smooth-lines-from-this-data#answer_380900

在 MATLAB Online 中打开

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

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Muhammad Taseer Islam 2019-6-26

Thanks Star Strider.

It really works.

Star Strider 2019-6-26

As always, my pleasure!

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Answer 2

KALYAN ACHARJYA 2019-6-26

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/468993-how-can-i-get-plot-with-smooth-lines-from-this-data#answer_380888

编辑：KALYAN ACHARJYA 2019-6-26

在 MATLAB Online 中打开

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);