Can't change the linewidth and color of the plot3 figure.

[yongeePark]

Bug category

• [o] bug - compilation error
• bug - compilation warning
• bug - runtime error
• bug - runtime warning
• bug - logic error

Describe the bug
I tried to change the line width and color when using plot3 like the example in the below link.
https://alandefreitas.github.io/matplotplusplus/plot-types/line-plots/line-plot-3d/

But the error is occured when I compiled, and error message is below.

Steps to Reproduce

    std::vector<std::vector<double>> line_xset;
    std::vector<std::vector<double>> line_yset;
    std::vector<std::vector<double>> line_zset;
    auto p1 = ax->plot3(line_xset,line_yset,line_zset,"--gs");
    
    p1->line_width(2);

Output

error: base operand of ‘->’ has non-pointer type ‘std::vector<std::shared_ptr<matplot::line> >’
     p1->line_width(2);

Platform

• [o] cross-platform issue - linux
• cross-platform issue - windows
• cross-platform issue - macos

Environment Details:

• OS: Ubuntu
• OS Version: 18.04
• Compiler: cmake
• Compiler version: 3.21

Additional context
Something strange is, I could change the linewidth and color in scatter3.