save

问题 I use Gnuplot and I would like to save values of a datafile into a variable with condition. For example, I have the following datafile 'example.dat': columnl column2 5 7.0 3 4.0 7 6.0 In my gnuplot script, I would like to be able to write: variable = " in the file 'example.dat' ($1)==5 ? $2 : 1/0 " which would be here the same as: variable = 7.0 of course the value depends on the datafile. So is it possible? If not, is it possible without condition? 回答1: This is how I worked around the

问题 When I simply print (like on paper), or save as PDF a page (using the browser built-in tool), the css is completely ignored and I just get ugly lines after lines of the content!! Is there a way to do this (without having to convert the HTML 2 PDF/image)? Thanks! 回答1: You should look up Media Types in CSS... set one up for printing and you should be good to go. I've found that this page is really helpful. 回答2: That's probably cause you've got the media option specified. <!-- will ignore css on

问题 Are model save() methods lazy in django? For instance, at what line in the following code sample will django hit the database? my_model = MyModel() my_model.name = 'Jeff Atwood' my_model.save() # Some code that is independent of my_model... model_id = model_instance.id print (model_id) 回答1: It does not make much sense to have a lazy save, does it? Django's QuerySets are lazy, the model's save method is not. From the django source: django/db/models/base.py , lines 424–437: def save(self, force

问题 I made a very simple fractal generator that prints out each step; I want to put it in a presentation I made. The tool with which I'm making the presentation obviously doesn't support pygame, is there any way to save it as a video? Preferably as an animated .gif or the like. 回答1: Not directly. But you can save a screencast of your program with one of the many available utilities that do this. I don't know about Windows or OSX, but if you are on Ubuntu or other gnome-based desktop you can

问题 This is a tricky one as I can't provide a reproducible example, but I'm hoping that others may have had experience dealing with this. Essentially I have a function that pulls a large quantity of data from a DB, cleans and reduces the size and loops through some parameters to produce a series of lm model objects, parameter values and other reference values. This is compiled into a complex list structure that totals about 10mb. It's then supposed to saved as an RDS file on AWS s3 where it's

问题 Coming from here: Basic http file downloading and saving to disk in python? Is there any possibility to save the file in any folder? I tried this but i get error: IOError: [Errno 2] No such file or directory: import urllib testfile=urllib.URLopener() testfile.retrieve("http://randomsite.com/file.gz","/myfolder/file.gz") Any possibility to do it? 回答1: You're most likely getting that error because /myfolder doesn't exist. Try creating it first import os import os.path import urllib destination

问题 I seem to have stumbled over a problem regarding saving an xml file from a string (this is done on the iPhone) The file itself exists and included in the project (hence within the workspace), and all indications I get from the code snippet which follows passes without any errors on the emulator and fail on the iPhone (error 513), but in either case the file is not saved! { Hits = config->Hits; NSString* filenameStr = [m_FileName stringByAppendingFormat: @".xml" ]; NSString* pData = [self

问题 I'm trying to store some custom class/data to a file in my iPhone/iPad app. I have a Class RSHighscoreList @interface RSHighscoreList : NSObject { NSMutableArray *list; } which contains objects of RSHighscore in the list @interface RSHighscore : NSObject { NSString *playerName; NSInteger points; } When I try to store all to file - (void)writeDataStore { RSDataStore *tmpStore = [[RSDataStore alloc] init]; _tmpStore.highscorelist = self.highscorelist.list; NSMutableData *data = [[NSMutableData

问题 I'm trying to store some custom class/data to a file in my iPhone/iPad app. I have a Class RSHighscoreList @interface RSHighscoreList : NSObject { NSMutableArray *list; } which contains objects of RSHighscore in the list @interface RSHighscore : NSObject { NSString *playerName; NSInteger points; } When I try to store all to file - (void)writeDataStore { RSDataStore *tmpStore = [[RSDataStore alloc] init]; _tmpStore.highscorelist = self.highscorelist.list; NSMutableData *data = [[NSMutableData

问题 I have multiple regressions in an R script and want to append the regression summaries to a single text file output. I know I can use the following code to do this for one regression summary, but how would I do this for multiple? rpt1 <- summary(fit) capture.output(rpt1, file = "results.txt") I would prefer not to have to use this multiple times in the same script (for rpt1, rpt2, etc.), and thus have separate text files for each result. I'm sure this is easy, but I'm still learning the R