Hi Tommy, I've attached a workflow that works without your needing to specify the length of the array. It uses a Composite actor inside an Iterate Over Array actor. Since you had no more control actors in the iteration of the workflow you sent me, I switched to the SDF director. Right now I just send the resultant array into a Barplot actor, but you should be able to change this to an R actor. Note also that I had to change the String Splitter actor to split on \n instead of \r\n, even though your files do indeed use dos end-of-line characters -- I'm not sure why this is the case at the moment.
To convert from String to Double, you can try the StringToN actor if you're running kepler-trunk. It doesn't have documentation and isn't in the gui search-tree yet, but you can use Tools => Instantiate Component to instantiate it. I believe you just configure the output port to be type double. If you're trying to use Kepler-1.0, let us know, and we can try to find a solution for that. Hope this helps, Derik -------------- next part -------------- A non-text attachment was scrubbed... Name: HistogramMaker_new.xml Type: text/xml Size: 74773 bytes Desc: not available URL: <http://mercury.nceas.ucsb.edu/kepler/pipermail/kepler-users/attachments/20090407/bc18e25a/attachment-0001.xml> -------------- next part -------------- On Apr 7, 2009, at 9:44 AM, Tommy Stropp wrote: > Sure, no problem. > > - Tommy > > http://www.arresteddevelopment2009.com > > > > > > From: barseghian at nceas.ucsb.edu > > To: tommystropp at hotmail.com > > Subject: Re: [kepler-users] I'm new to Kepler > > Date: Mon, 6 Apr 2009 18:10:38 -0700 > > > > Hi Tommy, > > If you don't mind, could you send me the workflow file? It will save > > me some time trying to help. If not, that's ok, I can try to help > > without it. > > Derik > > > > > > On Apr 6, 2009, at 4:00 PM, Tommy Stropp wrote: > > > > > Okay, I like the second option, but the problem I have now is > > > that when I set the iterations to 0, it gives me infinitely many > > > arrays (which makes sense). If I set it to 1, it does nothing. I > > > would have thought that I only need to set it to 1 since I only > need > > > to read the file once, no? I played around with the numbers and > with > > > a file that has 20 lines (so, an array of length 20), if I set > > > iterations to less than 46 it does nothing, 46 - 85 it displays > one > > > array, 86 - 125 it displays two, 126 it displays three, etc. > With a > > > 10 line file, it displays twice as many arrays. I've included > > > another screenshot of this new workflow and I simplified it a bit. > > > I've also made progress since my previous email. I solved the > > > problem of not knowing the lenght of the array I need by making a > > > composite actor that has its own Director that only fires once. I > > > use FileReader, put it the result in an array, and then I know the > > > array length. The only problem with this method is that it isn't > > > very... elegent. I don't like the fact that I have to read the > file > > > twice, with LineReader AND with FileReader. I mean, I'll use it > if I > > > have to but If I can make your method work, I would prefer that. > > > > > > And also, how do I convert from String to Double? I need it to > > > work with Doubles in other files, but there is no StringToDouble > > > actor (that I can find). > > > > > > - Tommy > > > > > > http://www.arresteddevelopment2009.com > > > > > > > > > > > > > > > > CC: kepler-users at kepler-project.org > > > > From: barseghian at nceas.ucsb.edu > > > > To: tommystropp at hotmail.com > > > > Subject: Re: [kepler-users] I'm new to Kepler > > > > Date: Fri, 3 Apr 2009 16:07:53 -0700 > > > > > > > > Tommy, > > > > > > > > Oops, you're right. I'm not sure of a way around having to > > > statically > > > > declare how long the array will be in advance of running the > > > workflow. > > > > > > > > One solution would be to run two workflows in succession. The > first > > > > would be a modified version of your workflow that instead ends > with > > > > your String to Int going into a Counter actor that outputs to > a File > > > > Writer. So this file would store the count of values found. Then > > > in a > > > > second modified version of your current workflow, you could > get the > > > > number of values via a File To Array Converter actor feeding > into an > > > > Array Maximum actor. > > > > > > > > Another option is to read the entire file in at the beginning of > > > your > > > > workflow with the File Reader actor. You could then split it by > > > end of > > > > line characters, and iterate over the resulting arrays to remove > > > +'s. > > > > With this option you'll know how many values you'll be sending > into > > > > the R actor from the start. > > > > > > > > Let me know how it goes, > > > > Derik > > > > > > > > > > > > > > > > On Apr 3, 2009, at 12:58 PM, Tommy Stropp wrote: > > > > > > > > > Hi Derik, > > > > > > > > > > Well, that kind of helped. > > > > > If I configure the arrayLength parameter to be the exact > number I > > > > > need, it does work. However, I don't know this number. It > will be > > > > > different for different files, and when I set it to a number > > > higher > > > > > than the number of values it will receive, I get no output. I > > > > > attached an ArrayLength actor to the SequenceToArray actor (so > > > now I > > > > > have StringToInt -> SequenceToArray -> ArrayLength -> > Display) and > > > > > it also gives me no output. It seems that the array isn't > being > > > > > created. > > > > > Any insight? Thanks again. > > > > > > > > > > - Tommy > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > CC: kepler-users at kepler-project.org > > > > > > From: barseghian at nceas.ucsb.edu > > > > > > To: tommystropp at hotmail.com > > > > > > Subject: Re: [kepler-users] I'm new to Kepler > > > > > > Date: Fri, 3 Apr 2009 12:36:28 -0700 > > > > > > > > > > > > Hi Tommy, > > > > > > > > > > > > You might try a Sequence To Array actor between your > String to > > > Int > > > > > and > > > > > > RExpression actors, so that you can feed all your values > into > > > the R > > > > > > actor at once. You'd optimally want to configure the > Sequence to > > > > > Array > > > > > > ArrayLength parameter to be the number of values it's > going to > > > > > > receive. If it's the case that you don't know and therefore > > > can't > > > > > set > > > > > > that number before running the workflow, in this case for > your > > > > > > particular workflow, I believe you can just set > ArrayLength to a > > > > > very > > > > > > high number. > > > > > > > > > > > > Derik > > > > > > > > > > > > On Apr 3, 2009, at 11:44 AM, Tommy Stropp wrote: > > > > > > > > > > > > > I'm trying to make a histogram of values that I read > from a > > > file. > > > > > > > Each value is on a separate line in the file and each line > > > has a > > > > > lot > > > > > > > of data that is separated by tabs. > > > > > > > So what I have been able to do is extract the numbers I > need, > > > > > but I > > > > > > > haven't been able to figure out how to put them all > together > > > to > > > > > make > > > > > > > a histogram. The way I have it now, Kepler makes a > separate > > > > > > > histogram for each value. Also, I only have that working > with > > > > > > > integers. I need to work with floating point numbers as > well. > > > > > > > I should also tell you that I know nothing when it comes > to > > > > > > > programming in R. Everything I am doing I am learning by > > > myself. > > > > > > > I've included a screenshot of what I have so far and a > couple > > > > > sample > > > > > > > files that can be opened with a text editor (the end of > line > > > > > > > character is \r\n). > > > > > > > Any help would be greatly appreciated. Thanks in advance. > > > > > > > > > > > > > > - Tommy > > > > > > > > > > > > > > > > > > > > > > > > > > > > Internet Explorer 8 makes surfing easier. Get it now! > > > > > > > < > > > > > > > KeplerWorkflow > > > > > > > .jpg > > > > > > > > > > > > > > > < > > > > > > > file1_integers > > > > > > > .gff > > > > > > > > > > > > > > > > ><file2_doubles.gff>_______________________________________________ > > > > > > > Kepler-users mailing list > > > > > > > Kepler-users at kepler-project.org > > > > > > > http://mercury.nceas.ucsb.edu/kepler/mailman/listinfo/kepler-users > > > > > > > > > > > > > > > > Create a cool, new character for your Windows Live? Messenger. > > > Check > > > > > it out > > > > > > > > > > Windows Live Messenger makes it easier to stay in touch ? learn > how! > > > <HistMaker.bmp> > > > > Internet Explorer 8 makes surfing easier. Get it now! > <HistogramMaker.xml>
