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hello everyone, Any idea how can i export a resultset from a database to a CSV or XLS file from the application ? would like the user to have the option to export selected data to a CSV/XLS file. Any plugins or libraries avaiable to accomplish this ? Thanks for your time, VASU. -- Posted via http://www.ruby-forum.com/.

Hi, Can someone please give me a pointer as to how I can set values of an array? Why does the code below not work? my_array <- array(dim=c(2,2)) my_array[][] = 0 my_array [,1] [,2] [1,] 0 0 [2,] 0 0 for(i in seq(1,2,by=1)){ for(j in seq(1,2,by=1)){ my_array[i][j] = 5 } } Warning messages: 1: In my_array[i][j] = 5 : number of items to replace is not a multiple of

I am going nuts here.. I have a form where users can write a city name (used with auto_complete) - and once they click on the desired city in the dropdown menu - I would like to have the Country field filled automatically as well... Is this possible at all ? If so, can somebody please tell me where I can find some documentation on the subject, or preferrably an example ? Many thanks in

Dear R-users, suppose I have three dataframes like these df1: mydate min_temp 31032013 12 01042013 8 02042013 -999 df2: mydate min_temp 31032013 10 01042013 11 02042013 14 df3: mydate min_temp 31032013 4 01042013 3 02042013 5 where -999 means that the temperature data is not available (at the moment I cannot change it to NA because I am not the db administrator); suppose also that oggi is

Hello, I am looking for a way to transform an array into a list (or a string). My array has two columns 1 and 2, and I would like to create a list of the values. Let's say I have : x1 x2 1 a b 2 c d 3 e f 4 g h What I would like to obtain is a,b,c,d,e,f,g,h. I tried without success melt and reshape ( reshape(my_array,

Hi @ all Does anyone has some experience with PostgreSQL and RoR? Does it gives any disadvantages or problems with PostgreSQL? I have a webapplication, that manage (read/write) many records (no. 200''000 records) and I search a ideal database. Actually, I have two options: - MySQL / - PostgreSQL And now, I would like to ascertain a good solution... Thx, ribit -- Posted via

Hi guys, bought the ROR book. I understand most of it and really like it. There is just on thing I just dont get. Lets take this code for example. def list @products = paginate :product, :per_page => 10 end As far as I understand @products should be some kinda hash or array, with the data of the Database inside. How can I display this array ? One solution is to do it like this (like in

Hello, I would like to compress some data, stored in a Numpy Array (Python) with something like (*): flac.compress(my_array) without having to put data in a .wav file, without having to deal with containers, etc., i.e. : *raw data in / raw data out* Do you have an idea on how to do that with FLAC? This could be useful for audio data of course (stored in simple arrays), but also for other kind

Hello I've been looking at a debuginfo issue on an out-of-tree target which uses DWARF aranges. The problem is that aranges are generated for both data and code objects, and the debugger gets confused when program addresses overlap data addresses. The target is a Harvard Architecture CPU, so the appearance of overlapping address ranges is not in itself a bug as they reside in different

I need to create a function to find all the prime numbers in an array. Can anyone point me in the right direction? Thank you. AJ -- View this message in context: http://www.nabble.com/Function-to-find-prime-numbers-tp25868633p25868633.html Sent from the R help mailing list archive at Nabble.com.

Hi - daft one for Friday morning coffee break: I have been trying to mount floppies on a couple of CentOS5 servers - the usual "mount /dev/fd0 /mnt/floppy" (yes, /mnt/floppy exists!). On both servers, the mount command just doesn't come back and I have to hit CTRL-C. I have tried different media and also changed the floppy drive on one server, /dev/fd0 is seen as present on both

I have an array with 44800 columns and 24 rows I would like to compute the row average for the array 100 columns at a time, so I would like to end up with an array of 24 rows x 448 columns. I have tried using apply(dataset, 1, function(x) mean(x[])), but I am not sure how to get it to take the average 100 columns at a time. Any ideas would be welcomed. thanks, Spencer [[alternative HTML

Hello I''ve only been playing with ruby and rails for a few short weeks, I have an class called time in my libs folder and I want to call an array from this class and populate a drop down box/select box in rails in one of my view pages. everything online is so confusing regarding this.. Just say my array is like this time = [[minute,min,20,50],[hour,hr,10,50]] How would I get a select

Hi everyone, I am trying to simulate the ''grep -v'' behavior in an array: Ex: vgrep([''aaa'',''bbb'',''ccc'',''aaaddd''], ''aaa'') Would return: [''bbb'', ''ccc''] So I tried to use ruby to do it: normally the ''-'' operation should be

On Wed, Jul 1, 2015 at 12:22 PM, Russell Wallace <russell.wallace at gmail.com> wrote: > I am arguing in favor of a point, and I understand you disagree with it, > but I don't think I'm dismissing any use cases except a very small > performance increment. > I'm sure Google has numbers about how much electricity/server cost they save for X% performance improvement.