为什么最优解找出来了，但是图却画不出出来

[wangzihao1234567]

problem = ea.Problem(name='moea quick start',
M=3,
maxormins=[-1,1,1],
Dim=6,
varTypes=[0]*6,# 初始化varTypes（决策变量的类型，0：实数；1：整数）
lb=[0.04,0.075,0.11,100000,100000,100000],
ub=[0.15]*3+[1000000,700000,400000],
evalVars=objective
)

构建算法

Field = ea.crtfld('RI', problem.varTypes, problem.ranges,problem.borders) # 创建区域描述器
algorithm = ea.moea_NSGA2_templet(
problem,
ea.Population(Encoding='RI',Field=Field ,NIND=100),
MAXGEN=500, # 最大进化代数
logTras=20) # 表示每隔多少代记录一次日志信息，0表示不记录
algorithm.mutOper.Pm = 0.5 # 修改变异算子的变异概率
algorithm.recOper.XOVR = 0.9 # 修改交叉算子的交叉概率

求解

res = ea.optimize(algorithm,
#prophet=ini,
verbose=True,#是否打印详细优化信息过程
drawing=1,#是否画优化过程图
outputMsg=True,#参数控制是否在优化完成后输出最终的结果信息
drawLog=True,#参数控制是否绘制优化过程中的日志或记录
saveFlag=False)#参数控制是否将优化结果保存到文件中

[wangzihao1234567]

No artists with labels found to put in legend. Note that artists whose label start with an underscore are ignored when legend() is called with no argument.

[wnsmiling]

I also meet this proble
UserWarning: No artists with labels found to put in legend. Note that artists whose label start with an underscore are ignored when legend() is called with no argument.
plt.legend()