[英]Matplotlib fontsize in terms of axis units
I'm adding a text field to a plot. 我正在为一个情节添加一个文本字段。 To determine the size of the letters I use
fontsize
parameter: 要确定字母的大小,我使用
fontsize
参数:
import matplotlib.pyplot as plt
r = plt.Rectangle((2,2), 10, 10, fill = False)
plt.gca().add_patch(r)
plt.text(7, 7, 'my rectangle', fontsize = 12, ha='center', va='center')
plt.axis(xmin = 0, xmax = 14, ymin = 0, ymax = 14)
I want the text 'my rectangle' to be exactly 2 units (of the y-axis) high. 我想文本'my rectangle'正好是2个单位(y轴)高。 Is there any way to do this?
有没有办法做到这一点?
I doubt this is exactly 2 data units but it looks pretty close: 我怀疑这正是 2个数据单元,但它看起来相当接近:
import matplotlib.pyplot as plt
r = plt.Rectangle((2,2), 10, 10, fill = False)
plt.gca().add_patch(r)
ymin, ymax = (0, 14)
plt.axis(xmin = 0, xmax = 14, ymin=ymin, ymax=ymax)
# Get dimensions of y-axis in pixels
y1, y2 = plt.gca().get_window_extent().get_points()[:, 1]
# Get unit scale
yscale = (y2-y1)/(ymax-ymin)
# We want 2 of these as fontsize
fontsize = 2*yscale
print fontsize, 'pixels'
txt = plt.text(7, 7, u"\u25AF" + 'my rectangle', fontsize=fontsize, ha='center', va='center')
plt.savefig('test.png')
To get this to work when resizing, you'll need to add a callback. 要在调整大小时使其工作,您需要添加回调。
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