rows

问题 I have an array that is 13867 X 2 elements and stored in variable called "data". So, I want to do the following in Matlab: Average (row 1 -> row 21) ; i.e. take the average of first 21 elements Average (row 22 -> row 43) ; i.e. take the average of next 22 elements Average (row 44 -> row 64); i.e. take the average of the next 21 elements Average (row 65 -> row 86); i.e. take the average of the next 22 elements Repeat the process until the end of the matrix, so that we take the average of the

问题 I am trying to pull the total number of rows in a SQL table. I am using the following code: $rowNum = mysql_query("SELECT COUNT(*) FROM Logs"); $count = mysql_fetch_assoc($rowNum); echo "Rows: " . $count; However, the output I get is Rows: Array rather than something like Rows: 10 . Any idea what I'm doing wrong? 回答1: mysql_fetch_assoc() returns an associative array with the result column names as keys and the result values as values. If you run var_dump($rowNum) , you'll see an array with

问题 I'm studying SQL and can't seem to find an answer to this exercise. Exercise: For all cases where the same reviewer rated the same movie twice and gave it a higher rating the second time, return the reviewer's name and the title of the movie. I don't know how to compare 2 rows and then get the higher rating. The tables' schemas are: Movie ( mID, title, year, director ) English: There is a movie with ID number mID, a title, a release year, and a director. Reviewer ( rID, name ) English: The

问题 I have a dataset that looks like this RID SID MID QID QText ------------------------------------------------------------------ NULL NULL NULL 10,20,30 't1','t2','t3' 10 14 13 4 'text2' 100 141 131 5,6 't5','t6' I'd like to run some sql command that would basically take the row with the nulls and concatenate the QID and QText columns to each row that has a valid RID, SID, MID so the end result would be a dataset similar to this (in this case the first row doesn't need to be there because I've

问题 I have a matrix with a large number of rows. I have another matrix that I will loop through one row at a time. For each row in the second matrix, I need to look for similar rows in the first matrix. Once all the similar rows are found, I need to know the row numbers of the similar rows. These rows will almost never be exact, so ismember does not work. Also, the solution would preferably (not necessarily, however) give some way to set a level of similarity that would trigger the code to say it

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . I have two different columns on Excel. I want to create a script that will sort Column F, (Have a header) and will sort Column B based on where Column F's sort worked out. (Without affecting any other columns

问题 <?php //if pageNum isset figure out where to start(7 rows per page * page num +1 $pageNum = isset($_GET['pageNum']) ? (int)$_GET['pageNum'] : 0; $startRow = $pageNum == 0 ? 0 : ($pageNum * 7 + 1); $endRow = $startRow + 7; $count = 0; while (($data = fgetcsv($handle, 1000, ";")) !== FALSE) { if($count >= $startRow) echo ' aantal vervangingen: 30'; $row = 1; if (($handle = fopen("vervangingen.csv", "r")) !== FALSE) { echo '<table border="1">'; while (($data = fgetcsv($handle, 1000, ";")) !==

问题 I am trying to get a macro to copy rows dependent on certain criteria, in this case "FX Ccy Options", for a table of data using column M. I have manged to do this with the below code, but I don't want to copy the entire row (c.EntireRow.copy). Just for all the columns with data (C:X). Sub Button2_Click() Dim bottomL As Integer bottomL = Sheets("DGM").Range("M" & Rows.Count).End(xlUp).Row: x = 1 Dim c As Range For Each c In Sheets("DGM").Range("M1:M" & bottomL) If c.Value = "FX Ccy Options"

问题 I have been working in python for the first time and basically I am trying to get these to labels to align in the correct columns and the correct row but for some reason it doesn't move down rows and the columns are not correct either. Any help would be much appreciated! CODE: from tkinter import * import sys #Setup GUI #Create main window main = Tk(); #Create title of main window main.title = "Waterizer 1.0"; #Create default size of main window main.geometry("1024x768"); #Lets get a fram to

问题 I would like to get the even rows/cols of a mat of 3 channels, something like this: A = 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 result = 1 1 1 1 1 1 How to can I do this using openCV? Thanks in advance. EDITED: Here is the code I'm using: Mat img_object = imread(patternImageName); Mat a; for (int index = 0,j = 0; index < img_object.rows; index = index + 2, j++) { a.row(j) = img_object.row(index); } But it throws the following exception: OpenCV Error: Assertion failed (m.dims >= 2) in Mat, file