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Python 3.5.2 : Distance from a point to a line

由 左心房为你撑大大i 提交于 2020-01-11 04:14:07
问题 I have created a class "Point" and i want to calculate the shortest distance between a given point and a line ( characterized by 2 other points ), all points are known. I tried to use this formula : |Ax+By+C| / sqrt(A^2+B^2) , but i messed up and got more confused by the minute (mostly because of math formulas :( )... I did find some sites where people asked this question too, but it either was not for Python or it was in a 3D system not 2D ... ​​ Below is my class : class Point: def __init__

How remove \n from lines

由 余生颓废 提交于 2020-01-10 17:40:29
问题 file, _ := os.Open("x.txt") f := bufio.NewReader(file) for { read_line, _ := ReadString('\n') fmt.Print(read_line) // other code what work with parsed line... } end it add \n on every line , end program to work , only work with last line... Please put example, i try anything end any solution what i find here not work for me. 回答1: You can slice off the last character: read_line = read_line[:len(read_line)-1] Perhaps a better approach is to use the strings library: read_line = strings

line seperator 问题

由 那年仲夏 提交于 2020-01-10 17:36:58
项目代码的开发人员使用了 的系统有linux, macOS, windows 有一天 ，我复制了一整个包（文件夹）到我的项目，然后提交的时候发现这个问题 出现 这个问题的原因是 windows使用的换行符是 CRLF, mac，linux使用的换行符是LF 我这个包是从用windows系统的同事那里复制过来的，所以就会出现这个问题。 在此我做个记录 解决办法： 1 . Jetbrain软件的右下角有这个line seperator选择 2. 直接点Fix and Commit 也可以， 本质上来讲，这些问题其实也不大，代码其实本质是没有不同的。 看下图。 参考连接： https://cloud.tencent.com/developer/article/1538126 https://blog.csdn.net/Kikitious_Du/article/details/79603444 来源： CSDN 作者： 何呵呵wj 链接： https://blog.csdn.net/weixin_38554490/article/details/103925571

How do you draw a line on a canvas in WPF that is 1 pixel thick

由 我的未来我决定 提交于 2020-01-10 12:05:40
问题 I'm using the Line class to draw on a canvas in WPF and even though I set StrokeThickness = 1 , the line shows up 2 pixels wide - it's almost as if the minimum thickness is two. How do I draw a line that is truly 1 pixel thick? Line myLine = new Line(); myLine.Stroke = System.Windows.Media.Brushes.Black; myLine.X1 = 100; myLine.X2 = 140; // 150 too far myLine.Y1 = 200; myLine.Y2 = 200; myLine.StrokeThickness = 1; graphSurface.Children.Add(myLine); 回答1: Two things: myLine.SnapsToDevicePixels =

How can I check if a point is below a line or not ?

由 为君一笑 提交于 2020-01-10 01:58:49
问题 How can I check if a point is below a line or not ? I've the following data: Line [ {x1,y1}, {x2,y2} ] Points {xA,yA}, {xB,yB} ... I need to write a small algorithm in python to detect points on one side and the other side of the line. thanks 回答1: You could try using a cross product -- http://en.wikipedia.org/wiki/Cross_product. v1 = (x2-x1, y2-y1) # Vector 1 v2 = (x2-xA, y2-yA) # Vector 1 xp = v1[0]*v2[1] - v1[1]*v2[0] # Cross product if xp > 0: print 'on one side' elif xp < 0: print 'on the

解决pycharm添加第三方包失败

由 风流意气都作罢 提交于 2020-01-10 00:17:44
今天想用pycharm打开图像，但是import scipy的时候报错了，报错内容如下： from scipy.misc import imread Traceback (most recent call last): File "<input>", line 1, in <module> File "D:\pycharm\PyCharm Community Edition 2017.2.3\helpers\pydev\_pydev_bundle\pydev_import_hook.py", line 21, in do_import module = self._system_import(name, *args, **kwargs) File "D:\Python\lib\site-packages\scipy\misc\__init__.py", line 67, in <module> from scipy.interpolate._pade import pade as _pade File "D:\pycharm\PyCharm Community Edition 2017.2.3\helpers\pydev\_pydev_bundle\pydev_import_hook.py", line 21, in do_import module = self._system

ImportError: No module named platform

由 六眼飞鱼酱① 提交于 2020-01-09 23:59:57
centos7+tensorflow1.5 import tensorflow as tf Traceback (most recent call last): File "<stdin>", line 1, in <module> File "tensorflow/ init .py", line 24, in <module> from tensorflow.python import * File "tensorflow/python/ init .py", line 49, in <module> from tensorflow.python import pywrap_tensorflow File "tensorflow/python/pywrap_tensorflow.py", line 25, in <module> from tensorflow.python.platform import self_check ImportError: No module named platform 在tensorflow下建了一个空的 init .py，运行不可以，改变PATH和PYTHONPATH的值也不可以 最后发现换个目录执行就没问题了 来源： 51CTO 作者： 一百天 链接： https://blog.51cto.com/onehundreddays

C中#error和#line预处理

由 走远了吗. 提交于 2020-01-09 15:43:13
#error用于 自定义 一条 编译错误 #warning用于自定义一条 编译警告信息 #error和#warning常用于 条件编译 的情形 #line用于强制指定 新的行号和编译文件名 一、#error预处理 #error预处理指令的作用是：编译程序时，只要遇到#error就会生成一个编译错误提示信息，并停止编译。其语法格式为： #error error-message 注意，宏串error-message 不用双括号包围 。遇到#error 指令时，错误信息被显示，可能同时还显示编译程序作者预先定义的其他内容。 示例代码： #include<stdio.h> #ifdef __cplusplus #error 亲，您当前使用的是C++编译器噢！ #endif #define M (a+b) //#define STR 1 int main(void) { int s, a, b; printf("input number: a&b:\n"); #ifdef STR printf("预先定义了STR\n"); #else printf("没有预先定义STR\n"); #endif scanf("%d%d", &a, &b); s = M * M; printf("s=%d\n", s); } 运行结果; 编译不通过，并在错误列表中输出自定义的错误信息 二、#line预处理

How to combine scatter chart with line chart to show line of regression? JavaFX

由 会有一股神秘感。 提交于 2020-01-09 07:23:06
问题 I've created a scatter chart with two sets of data; the first set is the actual data (x = year and y = pence) and the second set produces the same points but for the line of regression. However the problem I'm having is that both sets of data are shown as scatter points. I want to show the first set as scatter points and have the second set on the same graph but showing as a line. I've been at it for a long time but I can't figure out a way to do this. the scatter chart code is shown on

Python OpenCV line detection to detect `X` symbol in image

由 主宰稳场 提交于 2020-01-09 05:31:46
问题 I have an image where I need to detect a X symbol inside the line. The image: As you can see in the image above there is a X symbol inside a line. I want to know the X & Y coordinates of the symbol. Is there a way to find this symbol within this picture or is it to small? import cv2 import numpy as np def calculateCenterSpot(results): startX, endX = results[0][0], results[0][2] startY, endY = results[0][1], results[0][3] centerSpotX = (endX - startX) / 2 + startX centerSpotY = (endY - startY)
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