小编Jam*_*mes的帖子

我试图在MATLAB中绘制以下函数:

目标是将所有不同的条件拼接成一个图形以制作整体CDF图形.到目前为止我尝试的是以下内容:

x=linspace(0,1,20);
y=linspace(0,1,20);
Z=x.^y;
plot3(x,y,Z)
hold on
plot3(x,0,0);
plot3(0,y,0);

我不确定如何绘制图1,x>1, y>1以及是否有一种方法可以使绘图成为这组条件的固体曲面.我已经尝试使用rand()生成器在0和之间生成20多个数字1,这表示变量可以定位的区域.但是,当它是给定区域中的线条散布时,它看起来很麻烦.我宁愿它是一个坚实的表面.

我可以使用特定的命令吗？我在一些例子中看到过Mesh()用于使图形稳固但不确定这是否适用于数据集.

当我尝试做的时候我试图解决另一个问题在做了 pip uninstall scikit-learn 之后我收到了红色文本,例如:

pip install --upgrade pip
    Error checking for conflicts.
    Traceback (most recent call last):
          File "c:\users\james\appdata\local\programs\python\python37\lib\site-packages\
        pip\_vendor\pkg_resources\__init__.py", line 2584, in version
            return self._version
          File "c:\users\james\appdata\local\programs\python\python37\lib\site-packages\
        pip\_vendor\pkg_resources\__init__.py", line 2691, in __getattr__
            raise AttributeError(attr)
        AttributeError: _version

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "c:\users\james\appdata\local\programs\python\python37\lib\site-packages\
    pip\_internal\commands\install.py", line 503, in _warn_about_conflicts
        package_set, _dep_info = check_install_conflicts(to_install)
      File "c:\users\james\appdata\local\programs\python\python37\lib\site-packages\
    pip\_internal\operations\check.py", line 108, in check_install_conflicts
        package_set, _ = create_package_set_from_installed()
      File "c:\users\james\appdata\local\programs\python\python37\lib\site-packages\
    pip\_internal\operations\check.py", line 47, in …