skip

问题 Data.txt: Index;Time; 1;2345; 2;1423; 3;5123; The code: dat <- read.table('data.txt', skip = 1, nrows = 2, header =TRUE, sep =';') The result: X1 X2345 1 2 1423 2 3 5123 I expect the header to be Index and Time, as follows: Index Time 1 2 1423 2 3 5123 How do I do that? 回答1: I am afraid, that there is no direct way to achieve this. Either you read the entire table and remove afterwards the lines you don't want or you read in the table twice and assign the header later: header <- read.table(

问题 This question already has answers here : Split List into Sublists with LINQ (29 answers) Closed 6 years ago . How would one take a List (using LINQ) and break it into a List of Lists partitioning the original list on every 8th entry? I imagine something like this would involve Skip and/or Take, but I'm still pretty new to LINQ. Edit: Using C# / .Net 3.5 Edit2: This question is phrased differently than the other "duplicate" question. Although the problems are similar, the answers in this

问题 I've got the code below - it uploads an image to the server (which actually works) and then inserts the link to the image and some other information into a database. Somehow it skips the database-insert part in mysqli every single time . What am I doing wrong? Even when I do insert echo's between the mysqli-part lines, it doesn't echo them. Is this code seriously getting skipped or am I missing something pretty obvious? <?php //Handle IMG Upload - copyied from w3schools //THIS WORKS! $target

问题 so i have a program that has an email function however, some of the computer dont have outlook and so i need the code to open a folder on error... All of that i have working! but... now the code runs and even if no error it will run my "workaround". See code. How do i skip if no error? 'NO OUTLOOK APP WORK AROUND On Error GoTo WORKAROUND 'Create Outlook email Set xOutlookObj = CreateObject("Outlook.Application") Set xEmailObj = xOutlookObj.CreateItem(0) With xEmailObj .Display .To = "" .CC =

问题 while executing below loop fails as soon as a advertisement is encountered. Site purposefully put random advertisement. is it possible to handle it with #EANF# not sure how to code it. please help. Something like this. //if(text=="#EANF#" || text=="undefined" || text==null || text=="" ) //{ ////handle the loop //} var jsLF="\n"; var ret=null; var proxynovaurl; //open url proxynovaurl = "CODE:"; proxynovaurl += "VERSION BUILD=9002379" + jsLF; proxynovaurl += "TAB T=1" + jsLF; proxynovaurl +=

问题 I'm accessing a data context object that is auto-generated by using LINQ to SQL. The SQL database is a SQL Server 2000 box. The class I'm working with is a SQL View. I have a statement that is similar to this: query = _context.OrderDetails .Where(w => w.Product == "TEST") .OrderBy(o => o.DateCompleted) .ThenBy(t => t.LineItemId) .Skip(startRowIndex) .Take(maximumRows); However, when the value of Skip is anything but 0, I get this error: This provider supports Skip() only over ordered queries

问题 In my springbatch+quartz setup, I am reading a CSV File using FlatFileItemReader. I want to set the cursor for the reader to start the next jobinstance with the given parameters for reader. Is it possible? <bean id="cvsFileItemReader" class="org.springframework.batch.item.file.FlatFileItemReader" scope="step"> <!-- Read a csv file --> <property name="resource" value="classpath:cvs/input/report.csv" /> <property name="lineMapper"> <bean class="org.springframework.batch.item.file.mapping

问题 I am trying to skip a negative number of bytes with AudioInputStream skip(long bytes) method . The problem is trying to (let's say a small number of bytes...) : int skipped = audioInputStream.skip(-bytes); always returns 0 .... i don't know what to do . Here is the full code of the library on github . What i do is recreating the line every time the user skips audio which is extremely slow when i can of course do much better ... by just going backward or forward . Now it supports only forward

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 have a problem reading a textfile where I skip the first line and afterwards place it into a char array. The operation is very easy if I want to place it into an array which would looks like the code below, but again it should be a char array. var content = File.ReadAllLines("Labyrint.txt"); File.WriteAllLines("Labyrint.txt", content.Skip(1).ToArray()); 回答1: I actually did find a way to make it work, but the problem is it only works the first time. The reason why is that the first time the