gunplot warning: unrecognized option & invalid command

[KRJackLee]

I utilized matplot++ to plot a single line plot. The plot is successfully finished, sort of. But there are just some warning messages in gnuplot that disturbs me. Whose problem could it be? And should I be concerned?

relevant code

    double vol_start = 0.01;
    double vol_end = 0.2;

    std::vector<double> x = linspace(vol_start, vol_end);
    std::vector<double> y;
    for(auto xi:x){
        y.push_back(this->Efficient_Frontier(xi,"vol"));
    }

    plot(x, y, "-o");
    title("Efficient Frontier w/o Risk-free Asset");
    hold(on);

    show();

CMake

cmake_minimum_required(VERSION 3.22)
project(Markovitz)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_PREFIX_PATH "C:/Program Files/vcpkg/installed/x86-windows/share")

include_directories("C:/Program Files/vcpkg/installed/x86-windows/include")
link_directories("C:/Program Files/vcpkg/installed/x86-windows/lib")

find_package(matplot++)

FILE(GLOB SC_FILES "mv_port.hpp" "mv_port.cpp")

add_executable(${PROJECT_NAME} test.cpp ${SC_FILES})

target_link_libraries(${PROJECT_NAME} PRIVATE Matplot++::cimg std::filesystem Matplot++::matplot Matplot++::nodesoup)

Warning messages

gnuplot> se
           ^
         line 0: unrecognized option - see 'help set'.


gnuplot> t terminal wxt title "Figure 1" size 560,420 enhanced font "Sans,10"
         ^
         line 0: invalid command


gnuplot> se
           ^
         line 0: unrecognized option - see 'help set'.


gnuplot> t terminal wxt title "Figure 1" size 560,420 enhanced font "Sans,10"
         ^
         line 0: invalid command


gnuplot> se
           ^
         line 101: unrecognized option - see 'help set'.


gnuplot> t terminal wxt title "Figure 1" size 560,420 enhanced font "Sans,10"
         ^
         line 101: invalid command