matrix

问题 I have the following dictionary: g = { 'A': ['A', 'B', 'C'], 'B': ['A', 'C', 'E'], 'C': ['A', 'B', 'D'], 'D': ['C','E'], 'E': ['B','D'] } It implements a graph, each list contains the neighbors of the graph vertices (dictionary keys are the vertices itself). I'm in trouble, I can not think of a way to get a graph adjacency matrix from their lists of neighbors, might be easy but I am new to python, I hope someone can help me! I am using Python 3.5 I need to generate the following matrix: 回答1:

问题 I think there will be much more people interested into this subject. I have some specific task to do in the most efficient way. My base data are: - time indices of buy and sell signals - on the diag of time indicies I have ROC (rate of change) between closest buy-sell pairs: r <- array(data = NA, dim = c(5, 5), dimnames = list(buy_idx = c(1,5,9,12,16), sell_idx = c(3,7,10,14,19))) diag(r) <- c(1.04,0.97,1.07,1.21,1.1) The task is to generate moving compound ROC on every possible window (buy

问题 I think there will be much more people interested into this subject. I have some specific task to do in the most efficient way. My base data are: - time indices of buy and sell signals - on the diag of time indicies I have ROC (rate of change) between closest buy-sell pairs: r <- array(data = NA, dim = c(5, 5), dimnames = list(buy_idx = c(1,5,9,12,16), sell_idx = c(3,7,10,14,19))) diag(r) <- c(1.04,0.97,1.07,1.21,1.1) The task is to generate moving compound ROC on every possible window (buy

问题 After reading the Adobe PDF 1.7 (ISO 32000-1:2008) specification, I'm still having trouble understanding how to properly create my transformation matrix. The specification in section 4.2/4.3 state the following: • Translations are specified as [ 1 0 0 1 tx ty ], where tx and ty are the distances to translate the origin of the coordinate system in the horizontal and vertical dimensions, respectively. • Scaling is obtained by [ sx 0 0 sy 0 0 ]. This scales the coordinates so that 1 unit in the

问题 After reading the Adobe PDF 1.7 (ISO 32000-1:2008) specification, I'm still having trouble understanding how to properly create my transformation matrix. The specification in section 4.2/4.3 state the following: • Translations are specified as [ 1 0 0 1 tx ty ], where tx and ty are the distances to translate the origin of the coordinate system in the horizontal and vertical dimensions, respectively. • Scaling is obtained by [ sx 0 0 sy 0 0 ]. This scales the coordinates so that 1 unit in the

问题 I'm sure this is a simple problem, but I haven't been able to find an obvious solution. I have a series of model output array files (dim 180, 360, 12) generated in matlab that I need to open in R. I have attempted to use the R.matlab package, simply using the readMat command, and this results in a list object. Attempting to write this list into a matrix results in a memory allocation error. I have tried unlisting, but that did not help either. How can I open these matlab matrix files and

问题 I'm sure this is a simple problem, but I haven't been able to find an obvious solution. I have a series of model output array files (dim 180, 360, 12) generated in matlab that I need to open in R. I have attempted to use the R.matlab package, simply using the readMat command, and this results in a list object. Attempting to write this list into a matrix results in a memory allocation error. I have tried unlisting, but that did not help either. How can I open these matlab matrix files and

问题 How do I convert a cv::Mat of type CV_32FC1 to the type CV_64FC1 (equivalent to a change from float to double)? I am opening a Matrix that was saved as XML ( cvSave ) but as a float. This means that the field <dt> has the value f in the file. I need to change it to d to open it. But I'd rather not do this, instead I'd like to open it directly as a Matrix with elements of type double, or convert it later from float to double. Below is my code for opening the file. /** Load cv::Mat from XML

问题 I'm very new to Haskell and haven't fully understood how it works yet. In the following method I would like to change a certain value in a matrix or as it is realized in Haskell, a list of lists. setEntry :: [[Int]] -> Int -> Int -> Int -> [[Int]] setEntry x i j aij = This is my method so far. I know it's not much but I really don't know how to continue. The plan is to give it a matrix and then change the value that can be found in the ith line and the jth column to aij. I'd be very grateful

问题 How would I insert a vector b into a matrix at column col? I cannot find any syntax for and insert or append function in Fortran. So far all I have done is reassigned the values in the column, but I only want to insert the vector. real :: M(n,n) integer :: n, col real :: b(n) M(n:col) = b(:) 回答1: If I understood of your problem, you want to: increase the number n of columns of the matrix m by 1; insert the content of a vector b in m as a new column, at index col ; right-shift the remaining