rows

问题 I have a DataFrame in pandas with information about people location in time. It is about 300+ million rows. Sample: import pandas as pd inp = [{'Name': 'John', 'Year':2018, 'Address':'Beverly hills'}, {'Name': 'John', 'Year':2018, 'Address':'Beverly hills'}, {'Name': 'John', 'Year':2019, 'Address':'Beverly hills'}, {'Name': 'John', 'Year':2019, 'Address':'Orange county'}, {'Name': 'John', 'Year':2019, 'Address':'New York'}, {'Name': 'Steve', 'Year':2018, 'Address':'Canada'}, {'Name': 'Steve',

问题 I would like to calculate sums for certain columns and then apply this summation for every row. Unfortunately, I can only get to the first step. How do I now make it happen for each row? I know that R doesn't need loops; what are good approaches? My matrix (zscore) looks like this: a b c t y 1 3 4 7 7 4 2 4 56 6 6 4 3 3 3 2 1 7 4 3 88 9 9 9 Now I would want to calculate the row sum for each row, based on some of the columns. For one row it could look like this: f1 <- sum(zscore[1,1:2], zscore

问题 I would like to calculate sums for certain columns and then apply this summation for every row. Unfortunately, I can only get to the first step. How do I now make it happen for each row? I know that R doesn't need loops; what are good approaches? My matrix (zscore) looks like this: a b c t y 1 3 4 7 7 4 2 4 56 6 6 4 3 3 3 2 1 7 4 3 88 9 9 9 Now I would want to calculate the row sum for each row, based on some of the columns. For one row it could look like this: f1 <- sum(zscore[1,1:2], zscore

问题 I am trying to do something like this: Basically, I am using a UICollectionView and the cells (3 diferent .xib ). So far, it works. The thing I want to do is: Set a autoheight If rotate, add 1 row to the UIColectionView 2.1 If tablet, on portrait will have 2 rows and landscape 3 rows. (which basically is the same of point 2, only adding 1 row. I have something like this: extension ViewController { override func viewWillTransition(to size: CGSize, with coordinator:

问题 I made this program were the user can type in a year between 2009 and 2011 and get snow depth and air temperature data for the chosen year displayed on a graph. I have one xls file for the temperature for each day from day 1 to day 365. I also have another xls file for snow depth from day 1 to day 212. So some days they didn't bother to measure snow depth because it was summer anyways. Between 30. april to 1. october they didn't measure snow depth. I want to add 153 zeroes with code between

问题 I made this program were the user can type in a year between 2009 and 2011 and get snow depth and air temperature data for the chosen year displayed on a graph. I have one xls file for the temperature for each day from day 1 to day 365. I also have another xls file for snow depth from day 1 to day 212. So some days they didn't bother to measure snow depth because it was summer anyways. Between 30. april to 1. october they didn't measure snow depth. I want to add 153 zeroes with code between

问题 I made this program were the user can type in a year between 2009 and 2011 and get snow depth and air temperature data for the chosen year displayed on a graph. I have one xls file for the temperature for each day from day 1 to day 365. I also have another xls file for snow depth from day 1 to day 212. So some days they didn't bother to measure snow depth because it was summer anyways. Between 30. april to 1. october they didn't measure snow depth. I want to add 153 zeroes with code between

问题 This question already has answers here : MySQL - Rows to Columns (12 answers) Closed 4 years ago . I have a query that is displaying some information from various tables in a database. SELECT c.Name, jp.PieceType, jp.Qty FROM customer c LEFT JOIN job_new jn ON c.JobID = jn.ID LEFT JOIN job_pieces jp ON c.JobID = jp.JobID WHERE c.Company_ID = 123 GROUP BY c.ID I created the database on sqlfiddle: http://www.sqlfiddle.com/#!9/13230/8 Each company can have many piece types but right now the

问题 This question already has answers here : MySQL - Rows to Columns (12 answers) Closed 4 years ago . I have a query that is displaying some information from various tables in a database. SELECT c.Name, jp.PieceType, jp.Qty FROM customer c LEFT JOIN job_new jn ON c.JobID = jn.ID LEFT JOIN job_pieces jp ON c.JobID = jp.JobID WHERE c.Company_ID = 123 GROUP BY c.ID I created the database on sqlfiddle: http://www.sqlfiddle.com/#!9/13230/8 Each company can have many piece types but right now the

问题 I have to work on files with 5000 rows, for each row I have to insert 3 more rows and copy the content in these new rows (after that there will be more steps). My macro works fine but the process of copying the content is really slow, I´m sure there is a solution that works better, any ideas? Sub copy_rows() Application.Calculation = xlCalculationManual Application.ScreenUpdating = False Application.DisplayStatusBar = False Lastrow = Cells(Rows.Count, "A").End(xlUp).Row Lastrow = Lastrow * 4