Consider the following matrix:    P = [3 6 9 12; 4 8 12 16; 3 6 9 12]   What Octave command will you use to switch the rows and columns?

What is the most efficient way to write a trigger that updates a large number of rows?     Specify "for each statement"     Specify "for each row"     Specify "for each table"     Specify "referencing new row"

TODO 12 Let's now split our input data X and labels y into a train and test set using the train_test_split() function (docs). Here we'll use the 80-20 split rule where we use 80% of the data for training and 20% for testing. Lastly, we'll seed our split using the random_state keyword argument which will make sure we create the same split every time we run the function. Use the train_test_split() function to get a train and test split. Store the output into X_train, X_test, y_train, and y_test. Pass the required arguments X and y. Further specify we want to use 20% of the training data by setting the test_size keyword argument. Lastly, pass the keyword argument random_state=42 to set the random seed so we get the same split every time we run this code. Print the shape for X_train. Print the shape for y_train. Print the shape for X_test. Print the shape for y_test. # TODO 12.1X_train, X_test, y_train, y_test =  todo_check([    (X_train.shape == (413, 29), 'X_train does not have the…

Review concepts for VB.net:   Please explain the following concepts (what they do and how to use them): -              dvgList.DataSource = query.ToList -              dgvList.CurrentCell = Nothing -              dgvList.Columns(“name”).HeaderText = “Student Name” -              dgvList.RowHeadersVisible = True or False