请考虑以下示例，该示例在Matlab中绘制箱线图，这是我从here中摘录的。

rng('default')  % For reproducibility
x1 = rand(5,1);
x2 = rand(10,1);
x3 = rand(15,1);
x = [x1; x2; x3];
g1 = repmat({'First'},5,1);
g2 = repmat({'Second'},10,1);
g3 = repmat({'Third'},15,1);
g = [g1; g2; g3];
% Create the box plots.
boxplot(x,g)

以上将以等间隔的箱线图绘制，为此我可以更改xticks。我要对不均匀的横坐标值进行箱线图绘制，让我们说横坐标= [1.1，2.5，4.6]

谢谢