绘制曲线而不是直线 [英] Plot a curve rather than a line

问题描述

在matlab中，我有一个向量，例如x和一个x函数，例如y.我想在Matlab中绘制x和y.

In matlab, I have a vector, say x and a function of x say y. I want to plot x and y in matlab.

问题是我想要平滑的曲线(不是平滑的纹理而是可区分的，并且没有锐利的弯曲). Matlab带有图，只需将这些点连接起来即可，并且绘制的曲线具有急剧的弯曲.

The problem is I want smooth curve (not in a sense of smooth texture but differentiable, and without sharp bends). Matlab, with plot, simply joins the points and the plotted curve has sharp bends.

有没有办法解决这个问题?

Is there a way I can resolve this?

推荐答案

跟随 wakjah ，您需要将x和y插值到更多采样点

Following Dan and wakjah, what you need is to interpolate x and y to more sample points

plot( x, y, '+r' ); % plot the original points
n = numel(x); % number of original points
xi = interp1( 1:n, x, linspace(1, n, 10*n) ); % new sample points 
yi = interp1(   x, y, xi );
hold all;
plot( xi, yi ); % should be smooth between the original points

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