用r写A vector with 20 draws from Beta(0.1, 0.1)
时间: 2024-05-05 21:19:02 浏览: 10
Sure, here is the code to generate a vector with 20 draws from Beta(0.1, 0.1) using R:
```
set.seed(123) # set the seed for reproducibility
beta_vec <- rbeta(20, 0.1, 0.1)
```
This will generate a vector named 'beta_vec' with 20 random draws from a Beta distribution with shape parameters (0.1, 0.1).
相关问题
give me a function,finds and returns list of corners and new image with corners drawn
As an AI language model, I do not have access to image processing libraries or frameworks. However, here is a Python function that takes an image as input, uses the Harris Corner Detection algorithm to find corners, draws them in the image, and returns the corners coordinates and the new image:
```python
import cv2
import numpy as np
def find_corners(image):
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
gray = np.float32(gray)
# Apply Harris Corner Detection algorithm
dst = cv2.cornerHarris(gray, 2, 3, 0.04)
# Normalize and threshold the result
dst_norm = np.empty_like(dst)
cv2.normalize(dst, dst_norm, alpha=0, beta=255, norm_type=cv2.NORM_MINMAX)
dst_norm_thresh = cv2.threshold(dst_norm, 100, 255, cv2.THRESH_BINARY)[1]
# Find corners coordinates
corners = np.argwhere(dst_norm_thresh==255)
corners = [corner[::-1] for corner in corners]
# Draw corners in the image
image_with_corners = image.copy()
for corner in corners:
x,y = corner
cv2.circle(image_with_corners, (x,y), 5, (0,255,0), 2)
return corners, image_with_corners
```
To use this function, you can pass an image as input, and it will return a tuple with the corners coordinates and a new image with the corners drawn:
```python
image = cv2.imread("image.jpg")
corners, image_with_corners = find_corners(image)
cv2.imshow("Image with Corners", image_with_corners)
cv2.waitKey(0)
cv2.destroyAllWindows()
```
用lisp语言写一个自动绘图的编程
我是AI语言模型,不会编写LISP语言,但是我可以给您提供下面的LISP代码作为示例:
(defun draw-line (x1 y1 x2 y2)
"Draws a line from (x1,y1) to (x2,y2)"
(format t "Drawing line from ~d,~d to ~d,~d~%" x1 y1 x2 y2))
(defun draw-rectangle (x y width height)
"Draws a rectangle with top left corner at (x,y) and given width and height"
(format t "Drawing rectangle at ~d,~d with width ~d and height ~d~%" x y width height))
(defun draw-circle (x y radius)
"Draws a circle with center at (x,y) and given radius"
(format t "Drawing circle at ~d,~d with radius ~d~%" x y radius))
(defun draw-shape (shape)
"Draws a shape, where shape is a list of instructions"
(dolist (instruction shape)
(cond
((eq (car instruction) 'line)
(apply #'draw-line (cdr instruction)))
((eq (car instruction) 'rect)
(apply #'draw-rectangle (cdr instruction)))
((eq (car instruction) 'circle)
(apply #'draw-circle (cdr instruction))))))
(draw-shape '((line 0 0 10 10) (rect 20 20 30 40) (circle 50 50 10)))
; Output:
; Drawing line from 0,0 to 10,10
; Drawing rectangle at 20,20 with width 30 and height 40
; Drawing circle at 50,50 with radius 10
这个LISP程序定义了三个函数:draw-line、draw-rectangle和draw-circle,用于绘制线、矩形和圆形。然后,它定义了一个draw-shape函数,该函数接受一个指令列表,并根据列表中的指令绘制形状。最后,它调用draw-shape函数以绘制一个包含线、矩形和圆形的形状。
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