line

问题 I am new to ggplot2 and have problem displaying the regression line for the entire data-set together with the regression lines for groups. So far i can plot regression line based on the group but I have no success in getting the regression line for the entire data-set on the same plot. I want all the regression lines with different line style so that they can be easily identified in black and white print. Any help would be highly appreciated. here is my code so far: ggplot(alldata,aes(y = y,

问题 I'm trying to find a way to calculate the intersection between a b-spline and a straight line. So far Google hasn't been much help. 回答1: The most efficient algorithm that I've heard of is called Bezier clipping. Here's a book chapter on curve and spline intersection (pdf). 回答2: A pure mathematical approach: Transform the spline and the line so that the line lies on the X axis. Calculate the points on the spline where Y = 0 (depends on the order of the spline). Transform these points back to

问题 I want to write a program which filters the lines from my text file which contain the word "apple" and write those lines into a new text file. What I have tried just writes the word "apple" in my new text file, whereas I want whole lines. 回答1: Use can get all lines containing 'apple' using a list-comprehension: [ line for line in open('textfile') if 'apple' in line] So - also in one code-line - you can create the new textfile: open('newfile','w').writelines([ line for line in open('textfile')

问题 I'm looking for a definitive answer, maybe a function cos I'm slow, that will determine if a line segment and circle have collided, in javascript (working with canvas) A function like the one below that simply returns true if collided or false if not would be awesome. I might even donate a baby to you. function isCollided(lineP1x, lineP1y, lineP2x, lineP2y, circlex, circley, radius) { ... } I've found plenty of formulas, like this one, but they are over my head. 回答1: Here you will need some

问题 Is there any way to access automatically any Log in Logcat by a double click ? Actually, when there is an error crashing my Android Application, I can double click on the line saying for instance at com.myapp.mypackage$Class.function(File.java:117) And by Double-clicking on this line, I am automatically redirected to the related line of my code. But, when I try to generate the same line in another Log, example : Log.e("TAG", "at com.myapp.mypackage$Class.function(File.java:117)"); The Double

问题 You know, like Battlestar paper! I have given this a few goes but now I'm stumped. I haven't yet gone down the geometery route, so I'll explain this as best as I can. I'd like the border to be sizable, but contain fixed-size corners, just like CornerRadius does. Instead of rounded corners, I'd like them to be tapered, like: /---------\ | | | | \_________/ I've done two attempts at this: My first attempt attempts to manipulate a border class. This just doesn't work, as stretching the shape

问题 I'm new on c# and currently working on project so that I need to open an existing text file and editing the content of a specific line (i.e. 32) but I failed! Any help? 回答1: Well, based on your question you know the line number, so do something like this: var lines = File.ReadAllLines("path to file"); lines[31] = "some value"; File.WriteAllLines("path to file", lines); the first line of code gets you all the lines of a file into an array. The second line clearly sets thy known line to some

问题 I saw people using line height without specifying a unit, like this: line-height: 1.5; What does the number represents? I'm guessing it's a ratio so is it like em ? 回答1: line-height@ Mozilla Developer Network has a very good explanation (and examples) which is a easier to understand compared to the line-heightCSS specification. line-height can have the value specified in one of the following ways line-height: normal | <number> | <length> | <percentage> In your case, you are using a <number>

问题 Is there a way to remove only the axis lines in the Matlab figure, without affecting ticks and tick labels. I know that box toggles the upper and right axes lines and ticks and that works perfectly for me. But my problem is that I want eliminate the bottom and left lines (only lines!) but keeping the ticks and tick labels. Any tricks? 回答1: There is another undocumented way (applicable to MATLAB R2014b and later versions) of removing the lines by changing the 'LineStyle' of rulers to 'none' .

问题 Coming from Eclipse and having been used to duplicate lines all the time, it's pretty strange finding out that Xcode has no such function. Or does it? I know it's possible to change the system wide keybindings but that's not what I'm after. 回答1: The whole point is NOT to use the Cmd-C / Cmd-V shortcuts. I have the same issue coming from IntelliJ, and being able to just duplicate lines with Cmd-D and delete them with Cmd-Y is a big time saver. It's been bugging me ever since. However, it looks