matrix

问题 The data I have can be simplified as: Date;Temp 2019-06-20 00:00:00;18.44 2019-06-20 01:00:00;18.28 2019-06-20 07:00:00;18.23 2019-06-20 13:00:00;18.20 2019-06-21 02:00:00;18.48 2019-06-21 08:00:00;18.45 2019-06-21 14:00:00;18.36 2019-06-21 21:00:00;18.24 2019-06-22 01:00:00;18.15 2019-06-22 05:00:00;18.12 2019-06-22 12:00:00;18.06 2019-06-22 19:00:00;17.99 2019-06-23 00:00:00;17.35 2019-06-23 03:00:00;17.34 2019-06-23 08:00:00;17.31 2019-06-23 23:00:00;17.24 . . . I would like to collect all

问题 The data I have can be simplified as: Date;Temp 2019-06-20 00:00:00;18.44 2019-06-20 01:00:00;18.28 2019-06-20 07:00:00;18.23 2019-06-20 13:00:00;18.20 2019-06-21 02:00:00;18.48 2019-06-21 08:00:00;18.45 2019-06-21 14:00:00;18.36 2019-06-21 21:00:00;18.24 2019-06-22 01:00:00;18.15 2019-06-22 05:00:00;18.12 2019-06-22 12:00:00;18.06 2019-06-22 19:00:00;17.99 2019-06-23 00:00:00;17.35 2019-06-23 03:00:00;17.34 2019-06-23 08:00:00;17.31 2019-06-23 23:00:00;17.24 . . . I would like to collect all

问题 For a project I am working on I am trying to get get a 3D-model of a building visible in a browser. Of all the elements of the building I have vertices, indices and a matrix3d. This information comes from an application that uses OpenGL to show the elements in a offline program. Now I am trying to add these elements to my Three.js scene. I am at the point that I can add elements to the scene defined by the vertices and indices an I can see them by using materials and lights, but I can not

问题 I want to store a big sparse matrix using Spark, so I tried to use CoordinateMatrix , since it is a distributed matrix. However, I have not found a way to access each entry directly such as this way: apply(int x, int y) I only found the functions like: public RDD<MatrixEntry> entries() In this case, I have to loop over the entries to find out the one I want, which is not efficient way. Has anyone used CoordinateMatrix before ? What should I do to get each entry from CoordinateMatrix

问题 This question already has answers here : Plot multiple columns on the same graph in R [duplicate] (4 answers) Closed 2 years ago . For the following matrix of order 11*8 stored in an object named Results: Delta UE RE LS PT SP JS JS+ SRE0 0.000000 1 3.8730275 2.2721219 1.0062884 1.0047529 1.0317746 1.0318688 SRE1 0.100065 1 2.2478516 2.0595205 1.0502708 1.0453288 1.0436898 1.0764224 SRE2 0.200385 1 1.5838920 1.8793306 1.0359049 1.0437888 1.0529307 1.0753217 SRE3 0.300075 1 0.9129295 1.5360455

问题 I am working on writing a matrix, but unfortunately I am stuck with the output. Instead of showing a matrix, it shows me something like: actual matrix is Matrix@512fb063 I need to convert the matrix to a string so that the output will look like this: expected the matrix: 3 8 72 4 6 60 253 2 1 the code that I've written is this: import java.util.Random; final public class Matrix { private final int size1; // number of rows private final int size2; // number of columns private final int[][]

问题 I am having a trouble with coding in matrix. I have a matrix P with n x m dimensions. I need to find the first largest N (less than n) elements from the P and flag them to 1 . Let the matrix be Y , where Y(i,j)=1 or 0 Constraint : max(sum(Y(i))=1 ; min(sum(Y(i))=0 Application - I have n number of customers list and m number of offers. P(i,j) is expected profit from i th customer with j th offer. I need to figure out a matrix Y (n x m) which gives me the maximum expected profit. Each customers

问题 I'm trying to figure out if Google App Script language supports any sort of matrix operations that can be used on the back end. Thanks! 回答1: Google Apps Script is a variant of Javascript - so, yes, it can support matrix operations, or any other math you want to do. Also like Javascript, it cannot do so natively - you need to write the functions yourself, or find a library that suits. For matrix operations in particular, here's an option. Jos de Jong's mathjs library for Node.js works as-is in

问题 I've created a matrix of values from a simulation that is stored in 20x7 matrix (20 observations across 7 columns of numbers; the matrix is called output). The columns are output from a simulation. After running the simulation, I included column names: colnames(output) <- c('level', 'value1','value2','value3', 'value4','value5','value6') And the matrix looks nice and clean. when observing: output Is there a way to plot these columns from the matrix? I've tried the code below (and other

问题 I've created a matrix of values from a simulation that is stored in 20x7 matrix (20 observations across 7 columns of numbers; the matrix is called output). The columns are output from a simulation. After running the simulation, I included column names: colnames(output) <- c('level', 'value1','value2','value3', 'value4','value5','value6') And the matrix looks nice and clean. when observing: output Is there a way to plot these columns from the matrix? I've tried the code below (and other