Matlab-将封闭的对象转换为2D多边形

Question

我希望将对象转换为多边形，但出现以下错误。此外，当我绘制它们时，我会看到差异。如何将对象（例如C.txt）转换为二维多边形？

Warning: Polyshape has duplicate vertices, intersections, or other inconsistencies that may produce inaccurate or unexpected results. Input data has
been modified to create a well-defined polyshape. 
> In polyshape/checkAndSimplify (line 339)
  In polyshape (line 152)
  In Untitled (line 8)

脚本：

dataFile = dlmread('E:\C.txt'); % file stored in https://ufile.io/km74t
uniqueTable = unique(dataFile,'rows')
dataTable = array2table(uniqueTable,'VariableNames',{'X','Y'})
xCord=dataTable{:,1};
yCord=dataTable{:,2};
scatter(xCord,yCord)
hold on;
pgon = polyshape(uniqueTable)
plot(pgon)