copy

I was wondering if there is an easy way in MATLAB to do the following operation: I'd like to copy a row or column of a matrix and insert it in the next row/column. For example: given a 3x3 matrix 1 2 3 4 5 6 7 8 9 I'd like to copy the first row and insert it as a second row: 1 2 3 1 2 3 4 5 6 7 8 9 Can someone advise how I could accomplish this in MATLAB? Thanks! You can simply repeat the indices of the rows you'd like to repeat A = A([1 1 2 3],:) To insert row number source as row number target : A = [A(1:target-1,:); A(source,:); A(target:end,:)]; A = [A(1,:); A]; I know this is a really old

I'm trying to import data from a .csv file to Cassandra 3.2.1 via copy command.In the file are only 299 rows with 14 columns. I get the Error: Failed to import 299 rows: InvalidRequest - code=2200 [Invalid query] message="Batch too large" I used the following copy comand and tryied to increase the batch size: copy table (Col1,Col2,...)from 'file.csv' with delimiter =';' and header = true and MAXBATCHSIZE = 5000; I think 299 rows are not too much to import to cassandra or i am wrong? The error you're encountering is a server-side error message, saying that the size (in term of bytes count) of

I would like to slice a DataFrame with a Boolean index obtaining a copy, and then do stuff on that copy independently of the original DataFrame. Judging from this answer , selecting with .loc using a Boolean array will hand me back a copy, but then, if I try to change the copy, SettingWithCopyWarning gets in the way. Would this then be the correct way: import numpy as np import pandas as pd d1 = pd.DataFrame(np.random.randn(10, 5), columns=['a', 'b', 'c', 'd', 'e']) # create a new dataframe from the sliced copy d2 = pd.DataFrame(d1.loc[d1.a > 1, :]) # do stuff with d2, keep d1 unchanged You

这两天做项目，用到了BeanUtils.copyProperties()这个方法，而在两个不同的类中使用到这个方法，但不知怎么的，就是有一个对象服务发copy另外个对象，最后排查终于找到原因。 因为两个类引入了两个不同的BeanUtils类， 一个是 org.springframework.beans.BeanUtils， 另一个是org.apache.commons.beanutils.BeanUtils， 这两个类在不同的包下面，而这两个类的copyProperties()方法里面传递的参数赋值是相反的。 例如：a,b为对象，BeanUtils.copyProperties(a, b)的两个包对应的用法： BeanUtils是org.springframework.beans.BeanUtils ===》 a拷贝到b BeanUtils是org.apache.commons.beanutils.BeanUtils ===》 b拷贝到a 来源： oschina 链接： https://my.oschina.net/u/914271/blog/1809991

I want to copy the contents of a DataGridView and paste it in Excel. I tried: myDataGrid.SelectAll(); DataObject dataObj = myDataGrid.GetClipboardContent(); Clipboard.SetDataObject(dataObj, true) But this just pastes nothing. Any suggestions? Have you added this line? myDataGrid.ClipboardCopyMode = DataGridViewClipboardCopyMode.EnableWithoutHeaderText; Take a look at this MSDN article for a working sample. If you use Microsoft Visual Studio You can do it in Design File. Your Gridview ->right Click->Propeties->ClipBoard Copy Mode->EnableWithoutHeaderText 来源： https://stackoverflow.com/questions

I'm sure this question has been asked before, but none of the answers I found will work very well with my existing code. I'm posting this question in case there's a way to do it without completely redoing what I have so far. The idea is to display a very basic progress bar while copying files and directories from one drive to another. I have a class called BasicCopy that is designed to copy the contents of the Pictures, Documents, videos, and Music folders (standard on Windows machines) to folders of the same names within a backup directory on a second drive. Here is the class so far: import

Is there a way to make a copy of an object (or even better a list of objects)? I'm talking about custom objects of classes that may be extended by other classes. example: class Foo() { var test = "test" } class Bar() extends Foo { var dummy = new CustomClass() } var b = new Bar() var bCopy = b.copy() // or something? In Java, they tried to solve this problem a clone method, that works by invoking clone in all super-classes, but this is generally considered broken and best avoided, for reasons you can look up (for example here ). So in Scala, as genereally in Java, you will have to make your