dataset

问题 Is anyone aware of a script/class (preferably in PHP) that would parse a given MySQL table's structure and then fill it with x number of rows of random test data based on the field types? I have never seen or heard of something like this and thought I would check before writing one myself. 回答1: What you are after would be a data generator. There is one available here which i had bookmarked but i haven't got around to trying it yet. 来源： https://stackoverflow.com/questions/19162/php-script-to

问题 I've got a web app that sends a request to a WCF service. The WCF service gets a LINQ resultset (anon. ilist) and sends that in reply, back to the web app. In order to get it working quickly, inside the WCF app, i'm using copytodatatable and sending it to my web app in a DataSet. My web app then takes the DataSet and writes it to xml, some xslt is performed and the resulting data is shown on screen. Perfect. ... Well, not really. I'm still (relatively) new to WCF. I understand that sending

问题 I have two matrices like the following ones: '01/01/2010' 1 '02/01/2010' 2 '03/01/2010' 3 '05/01/2010' 11 '06/01/2010' 17 '01/01/2010' 4 '02/01/2010' 5 '04/01/2010' 6 '05/01/2010' 7 , and after doing a few tricky things in MATLAB, I want to create the following three matrices: '01/01/2010' 1 4 '02/01/2010' 2 5 '03/01/2010' 3 NaN '04/01/2010' NaN 6 '05/01/2010' 11 7 '06/01/2010' 17 NaN '01/01/2010' 1 4 '02/01/2010' 2 5 '05/01/2010' 11 7 Any idea on how to join these tables? Cheers. EDIT:

问题 Hello i have dataset a few thousand lines which is split in even and odd number lines and i can't find a way to join them together again in the same line. Reading the file and overwriting it is fine or making a new file. I have found this example to print the seperate lines but can't get it to write it to file. I would like it to look like this: Time = 1 Temperature1 = 24.75 Temperature2 = 22.69 Temperature3 = 20.19 RPM = -60.00 Time = 2 Temperature1 = 24.75 Temperature2 = 22.75 Temperature3

问题 Hello i have dataset a few thousand lines which is split in even and odd number lines and i can't find a way to join them together again in the same line. Reading the file and overwriting it is fine or making a new file. I have found this example to print the seperate lines but can't get it to write it to file. I would like it to look like this: Time = 1 Temperature1 = 24.75 Temperature2 = 22.69 Temperature3 = 20.19 RPM = -60.00 Time = 2 Temperature1 = 24.75 Temperature2 = 22.75 Temperature3

问题 I am writing a C# application that uses Local DataSets. I have a DataSet for Customer Information, and a DataSet for Stocked Items. In regards to perfomance, and file size, would it be advisable to use just one DataSet with the Customer Infomation and the Stocked Items DataTables, or separate DataSets for each DataTable? I intend to use data to put into a report (using report viewer). 回答1: The DataSet is built for, well just that, a set of data. It's built to allow you to create relationships

问题 How do I subset missing values in one dataframe with values from another? Let's say I have two datasets: dataset 1 shows the amount of food that is produced by a country each day. country day tonnes of food ## 1 china 1 6 ## 2 china 1 NA ## 3 china 2 2 ## 4 china 2 NA dataset2 is the average amount of food by day country day average tonnes of food ## 1 china 1 6 ## 3 china 2 2 How can I fill in the NAs of dataset1 with the averages from dataset2. I.e. IF is.na(dataset1$tonnes) is TRUE then

问题 I have a dataaset1 which contains 17-20 rows. Now i have another dataset as dataset2, containing 4-5 rows. the rows of dataset 2 should be added into dataset1, which then should be binded to grid again (containing 22-25 rows in total). How is that possible? Also, the dataset 2 rows have to be added based on some condition of dataset1 column. Say if column 1 is 'Y', then the dataset 2 rows should be added. 回答1: C# Version ( Please accept f0x's answer if this is the method you're looking for ):

问题 in my project, when a new user register online on my website, then my project create a directory on server with the user name "abc" and copy a myDB.mdb file in it. this .mdb file contains predefined 2 tables. now my question is : 1 is it possible to connect and use with Dataset.xsd in this task. 2 how each user read and write data with there own myDB.mdb file 3 how to make the connection string flexible. so it ll connect with each user myDB.mdb file. I don't have any clue that how to complete

问题 Say, we have input x and label y : iterator = tf.data.Iterator.from_structure((x_type, y_type), (x_shape, y_shape)) tf_x, tf_y = iterator.get_next() Now I use generate function to create dataset: def gen(): for ....: yield (x, y) ds = tf.data.Dataset.from_generator(gen, (x_type, y_type), (x_shape, y_shape)) In my graph, I use tf_x and tf_y to do training, that is fine. But now I want to do referring, where I don't have label y . One workaround I made is to fake a y (like tf.zeros(y_shape)),