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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . Essentially, i want to find the equation of the ring that circles a point in space, this ring is perpendicular to a normal away from this point. I have a line, in the form of 2 points, L1 , L2 ; I have the normal from L1->L2, N ; I have the plane that is normal to L1->L2, which L1 lies on. ax + by + cz = d ; I

问题 After some hours of research I made this script: function get_string_on_interval($strings, $interval) { return $strings[round((time()/$interval - floor(time()/$interval)) * sizeof($strings))]; } echo get_string_on_interval(file('matlista.txt'), 60*60*24); In this matlista.txt I have a specific word on each row/line. This script shows a string from this text file on my site but the problem is that it doesn't start showing from index 1 (which is row/line 1) it starts from the line 46 . I don't

问题 Please suggest me some methods on thick horizontal line detection in images. Any papers, libraries etc please. 回答1: Binary threshold the image, then use a combination of morphological operations to detect "borders that are thicker then N1 but thinner than N2" to produce several images and combine (logically AND) them to selectively detect borders of a certain expected thickness. 回答2: OpenCV is a good library. You may use a Hough transform to detect lines. Note that the answer may depend on

问题 I am attempting to use p2 director with a command line parameter to get a list of installable units from a p2 repository. I started with the steps from this post to use the -list parameter: Command line to find units in a p2 repository using p2 query language However, when I run p2 director, the command line returns nothing. My command line looks like this: "C:\IBM\IBM_DevelopmentPackage_for_Eclipse_Win_X86_32_6.5.5\eclipseDevelopmentPackage\eclipse"\eclipsec.exe -application org.eclipse

问题 I have 9 years of data, each has the same variables saved e.g. summer, warmest months, length of sunlit months etc. I want to plot each year's variables as a set of horizontal lines, grouped together, with different line properties. So years will be on the y axis and months on the x axis. Sorry this is a little vague, I'm not sure how else to describe it. 回答1: The following code might get you close to, if not the exact thing, what you are looking for - %% PLOT YEARLY DATA ON TOP OF EACH OTHER

问题 I am trying to make a line chart using Vizframe in an Object Page . Does anybody have an example how to do it? I searched the APIs and the sdn but find just samples with Layout element and not Object Page Layout element. So when I test it within a simple Layout element (< layout > element) the line charts works fine. But when I try it with Object Page Layout elementt, the chart doesn't show and there is no errors in the console. Thanks a lot, Haylee N. I joined the two different views here:

问题 For example, right now I'm using the following to change a couple of files whose Unix paths I wrote to a file: cat file.txt | while read in; do chmod 755 "$in"; done Is there a more elegant, safer way? 回答1: Read a file line by line and execute commands: 4 answers This is because there is not only 1 answer... shell command line expansion xargs dedicated tool while read with some remarks while read -u using dedicated fd , for interactive processing (sample) Regarding the OP request: running

问题 I am trying to read a text file with data according to a specific format. I am using and textscan together with a string containing the format to read the whole data set in one code line. I've found how to read the whole line with fgetl , but I would like to use as few code lines as possible. So I want to avoid own for loops. textscan seems great for that. As an example I'll include a part of my code which reads five strings representing a modified dataset, its heritage (name of old dataset),

问题 I am trying to move a Sprite along a straight line path. I want to move it 5 pixels on the slope, or the hypotenuse each time I go through the method until I reach the end point. I have the slope and y-intercept of the line, I also have the current X and Y values of the sprite through getX() and getY(). The final X and Y points to stop at are variables finalX and finalY. I have tried so many equations but I can't seem to get any of them to work. What am I missing!!? My latest equation was

问题 I have to parse (C#) a .CSV file, with a variable "width" and 2 lines of header information (the fist one being name and the second one being the unit). The data looks like: Example1.CSV: "timestamp","NAME_1","NAME_2","NAME_3","NAME_4" "ms","unit_1","unit_2","unit_3","unit_4" 0.01,1.23,4.56,7.89,0.12 0.02,1.23,4.66,7.89,0.11 0.03,1.23,4.76,7.89,0.11 0.04,56.23,4.86,7.89,0.12 Example2.CSV: "timestamp","NAME_1","NAME_2","NAME_3","NAME_4","NAME_5",...,"NAME_N" "ms","unit_1","unit_2","unit_3",