[Solved] How to shrink at runtime a struct matrix (using realloc() for example)

You should reduce the number of columsn, not rows. Not mat1 but mat1->array should be reallocated. Not nrow and ncol (not updated) but mat1->nrows and mat1->ncols (updated) should be used for the new size. The elements are size_t, so allocating for int mayn’t be enough. Using the variable for calculating size is safe. In the … Read more

[Solved] Matrix Scale down using MATLAB [closed]

You cannot have non-integer sized matrices. 22,5 is not a valid dimension of a matrix. If you are talking about images you can resize the matrix in Matlab using imresize. . A = rand(254, 128); A = imresize(A, [45, 23]); 5 solved Matrix Scale down using MATLAB [closed]

[Solved] Browse a matrix

Here the solution I found : private static IEnumerable<int> ComputeMatrix(int[,] matrix) { // check args if (matrix.Rank != 2) { throw new ArgumentException(“matrix should have a rank of 2”); } if (matrix.GetUpperBound(0) != matrix.GetUpperBound(1)) { throw new ArgumentException(“matrix should have the same size”);} // indice treated List<int> treatedIndex = new List<int>(); for (int i = … Read more

[Solved] C# Console Application program to Create a user defined matrix and find Lowest number [closed]

Put this outside your “main” method to get make sure the user gives a number. private static int GetNumber(string request) { bool succeeded = false; Console.WriteLine(request); string reply=””; while(!succeeded) { reply = Console.ReadLine(); try { int.Parse(reply);//Attempt to convert “reply” into an integer. succeeded = true; } catch { Console.WriteLine(request+” (make it a number)”); } } … Read more

[Solved] Processing the data in a matrix in r [closed]

NOTE: Your question as it stands is not appropriate for this site. You should include a minimum reproducible example. Include code that you’ve tried and where it’s causing you trouble. At this point, you’re likely to continue getting down votes, and your question may potentially get closed. Be aware of that. Please visit the help … Read more

[Solved] can’t multiply matrix and list which type ‘float’

You are multiplying a list by a float. You should multiply each row of the matrix with words. Something like this will work. multiply_nonspam_test = [] for row in transpose_test_feature: multiply_nonspam_test.append([x*y for x,y in zip(row, log_train_probs_nonspam_words)]) print multiply_nonspam_test 0 solved can’t multiply matrix and list which type ‘float’

[Solved] Convert Matrix to Vector [closed]

Your problem is a very specific one. I don’t see how this will be of any use to anybody but yourself. There is no ‘one line solution’. There are many ways to approach indexing problems, I like to use scalar indexing when possible: Ncolumns = size(Matrix,1); Nblocks = floor(Ncolumns/4); %number of 4-line blocks (excluding the … Read more

[Solved] Convert text file to matrix [closed]

I will try to guess what is asked. Assuming that your data frame is named df, you can convert each column to matrix and put it in list using lapply(). For example, I converted to matrix with two columns. seq_len(ncol(df) will make sequence of numbers from 1 to number of columns, so conversion will iterate … Read more

[Solved] Convert text file to matrix [closed]

Introduction This post provides a solution to the problem of converting a text file into a matrix. The solution involves using a combination of programming languages such as Python, R, and MATLAB to read the text file and then convert it into a matrix. The post also provides a step-by-step guide on how to do … Read more