Pyplot用数字除以X刻度轴

Question

我有这段代码可以在数组u定义的x和y轴上绘制曲线

titulo = "lambda=0.5   M=200   N=10"

M = 200
N = 10
u = calcula_u_a1(M,N)


for i in range (0, M+1, int(M*0.1)):
#     if i == 0 or i == round(0.1*M) or i == round(0.2*M) or i == round(0.3*M) or i == round(0.4*M) or i == round(0.5*M):
    plt.plot(u[i], label= "t=" + str(i/M))
    plt.legend(loc='best')
    plt.title(titulo)
    plt.xlabel('Distancia')
    plt.ylabel('Temperatura')



plt.show()

我需要做的是将x比例除以[0，...，10]，而不是[0，...，1]（将x比例除以N）

是否这样做？

谢谢！

Answer 1

实际上我用另一种方法解决了这个问题，我创建了一个线性空间并将其设为我的X轴：

titulo = "lambda=0.5   M=800   N=20"
M = 800
N = 20
X = np.linspace(0, 1, N+1)
u = calcula_u_a1(M,N)

for i in range (0, M+1, int(M*0.1)):
   plt.plot(X, u[i], label= "t=" + str(i/M))
   plt.legend(loc='best')
   plt.title(titulo)
   plt.xlabel('Distancia')
   plt.ylabel('Temperatura')

plt.show()

Answer 2

您可以简单地将xticks更改为您需要的样子！

我还从循环中删除了图的标题和标签，因为您不需要为每条绘制的线分配它，而只需为整个图形/子图分配它！

titulo = "lambda=0.5   M=200   N=10"

M = 200
N = 10
u = calcula_u_a1(M,N)

# Added to be able to manipulate easly XTicks of the plot
fig = plt.figure()
ax = fig.add_subplot()

for i in range (0, M+1, int(M*0.1)):
#     if i == 0 or i == round(0.1*M) or i == round(0.2*M) or i == round(0.3*M) or i == round(0.4*M) or i == round(0.5*M):
    ax.plot(u[i], label= "t=" + str(i/M))

# Ticks are placed at positions 0 to 10 but the values displayed are from 0 to 1
ax.xaxis.set_ticks(np.arange(0, 11, 1))
ax.xaxis.set_ticklabels(np.arange(0, 1.1, 0.1).round(1))

# Moved these out of the loop
plt.legend(loc='best')
plt.title(titulo)
plt.xlabel('Distancia')
plt.ylabel('Temperatura')
plt.show()