line | 易学教程

Line with fill and stroke

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问题 I'm trying to create a line that looks like this in wpf. Does anyone have any idea how to do this? I need to bind the x and y coordinates, so a line works really well except I can't make it look like this. 回答1: You can't do this with a simple line, but with a Border object it is very easy. <Border Width="100" Height="10" Background="#FFFFDAAD" BorderBrush="Orange" BorderThickness="0,3"/> 回答2: You can overlay multiple Lines, Polylines or Polygons to achieve similar effects and use resources to

Matplotlib line width based on axis, not on points

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问题 If you set a line width in Matplotlib, you have to give the line width in points. In my case, I have two circles, both with radius R and I want to connect them with a line. I want this line to be 2*R wide in order to get a rod-shape. But when I say myLines[i].set_linewidth(2*R) this makes the lines always a specific thickness, regardless of how much I have zoomed in. Is there a way to make lines a specific thickness not based on the number of pixels or points, but scaling with the axis? How

.gclient文件

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//注意以.开头的文件名在linux下都是隐藏文件，需要使用ll 或者ls -all 才可以查看. .gclient文件必须有,否则会报类似下面的错误: Traceback (most recent call last): File "/webrtc/depot_tools/gn.py", line 71, in <module> sys.exit(main(sys.argv)) File "/webrtc/depot_tools/gn.py", line 49, in main 'gn', 'gn' + gclient_utils.GetExeSuffix()) File "/usr/lib/python2.7/posixpath.py", line 70, in join elif path == '' or path.endswith('/'): AttributeError: 'NoneType' object has no attribute 'endswith' 原文链接：https://blog.csdn.net/zhangkai19890929/article/details/81904517 来源： https://www.cnblogs.com/hshy/p/12031403.html

Java - Point on line

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问题 How can i find out if a Point(x,y) is on a the Line created between two other Points? I tried this but something seems to be wrong, as i don't get the results i should. public boolean intersects(Point k, Point z, Point p) { Line2D line = new Line2D.Float(k.x, k.y, z.x, z.y); if (line.ptLineDist(p) == 0) { return true; } else { return false; } } 回答1: Try this, taking Hovercraft's note about floating point numbers' imprecision into account. public boolean intersects(Point k, Point z, Point p) {

How can I find the points in a line - Objective c?

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问题 Consider a line from point A (x,y) to B (p,q). The method CGContextMoveToPoint(context, x, y); moves to the point x,y and the method CGContextAddLineToPoint(context, p, q); will draw the line from point A to B. My question is, can I find the all points that the line cover? Actually I need to know the exact point which is x points before the end point B. Refer this image.. The line above is just for reference. This line may have in any angle. I needed the 5th point which is in the line before

Changing line color

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问题 I'm trying to change the colour of a line on matplotlib subject to a condition. Basically I take a rolling average and a rolling standard deviation. I plot the rolling average, but I would like to change the line colour if the standard deviation corresponding to that average is over the threshold I set. This is not the color of the whole line , just the bits that are over the threshol. Mostly my data is set using pandas Alternatively I could shade it instead. This link is useful, although I

Create line extensions for given line created by user

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问题 I've been working in an app which I have to capture user's touches and draw a line on the screen. This is working so far. The problem is that I'd like to create some kind of extension for that line that goes from the line start/end to the screen boundaries. It's important to that extension be aligned to the main line. I've been trying to accomplish this for some days but without positive results. My idea was to use some kind of linear equation to represent the line and after create two point

Add horizontal lines in categorical scatter plot using ggplot2 in R

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问题 I am trying to plot a simple scatter plot for 3 groups, with different horizontal lines (line segment) for each group: for instance a hline at 3 for group "a", a hline at 2.5 for group "b" and a hline at 6 for group "c". library(ggplot2) df <- data.frame(tt = rep(c("a","b","c"),40), val = round(rnorm(120, m = rep(c(4, 5, 7), each = 40)))) ggplot(df, aes(tt, val))+ geom_jitter(aes(tt, val), data = df, colour = I("red"), position = position_jitter(width = 0.05)) I really appreciate your help!

how to delete duplicate lines in a file in Python

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问题 I have a file with duplicate lines. What I want is to delete one duplicate to have a file with unique lines. But i get an error output.writelines(uniquelines(filelines)) TypeError: writelines() argument must be a sequence of strings I have searched the same issues but i still don-t understand what is wrong. My code: def uniquelines(lineslist): unique = {} result = [] for item in lineslist: if item.strip() in unique: continue unique[item.strip()] = 1 result.append(item) return result file1 =

Reading File by line instead of word by word

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问题 I'm trying to write some code that scans for palindromes in an input file, but it gets strings from each word instead of each line. An example would be racecar would show up as racecar= palindrome or too hot to hoot = palindrome but instead it will go too= not a palindrome, hot= not a palindrome etc. Here is what I am doing to read the file currently File inputFile = new File( "c:/temp/palindromes.txt" ); Scanner inputScanner = new Scanner( inputFile ); while (inputScanner.hasNext()) {