我想交换 x 轴和 y 轴并将此图更改为水平图 python

Question

I want to swap the x-axis and the y-axis and turn this graph into a horizontal graph

my python code

    an_image = PIL.Image.open("static/img/t2.jpg")
    gray_img = ImageOps.grayscale(an_image)
    image_sequence = gray_img.getdata()
    image_array = np.array(image_sequence)
    with plt.style.context('dark_background'):
        plt.plot(image_array[:1024], color='white' )
    plt.savefig('static/img/his.png')

Answer 1

I'm not sure if that's what you want, but this will swap x-axis and y-axis of the original graph:

an_image = PIL.Image.open("static/img/t2.jpg")
gray_img = ImageOps.grayscale(an_image)
image_sequence = gray_img.getdata()

y = np.array(image_sequence)
with plt.style.context('dark_background'):
    # Create the x-axis with the same size as y-axis
    x = np.arange(0, 1024)
    
    # Plot x-axis and y-axis in swapped positions
    plt.plot(y[:1024], x, color='white')

plt.savefig('static/img/his.png')

---

If I want to move x-axis to the top What do I have to do?

Just add

plt.gca().xaxis.tick_top()

before saving the fig.

Full code:

an_image = PIL.Image.open("static/img/t2.jpg")
gray_img = ImageOps.grayscale(an_image)
image_sequence = gray_img.getdata()

y = np.array(image_sequence)
with plt.style.context('dark_background'):
    x = np.arange(0, 1024)
    plt.plot(y[:1024], x, color='white')

plt.gca().xaxis.tick_top()
plt.savefig('static/img/his.png')