Help with Running Averages and Graphs on Ipad3

I am new to Mac, slowly learning but quickly falling in love with it.
I need to keep track of our basketball teams free throw percentages for 5 team and for each kid. The coaches are asking for, made shots, missed shots, total attempts and their percentages and then an running average of their percentages.
I created a spreadsheet for each team and seperate tabs for each kid (attached image) in Numbers on the ipad which will allow me to add their made and missed shots (=sumB2+C2). It then gives me the total of attempts and then gives me that percentage (=B2/D2) all good here.
This is now what I am trying to see if I can do, I want to be able to just fill in the blank fields day to day or as they shoot and then have it just update the running average on the bottom without me having to adjust the cells to re-calculate.
If I select cells E2 to E25 the error comes up Cell "E4" contains an error. I know it is cause no figures are entered in the row yet. Is there away around doing the percentage formula so it just shows blank in the row without the error show it will do the running total or a way to have it calculate the running total even with the error?
Can I take the overall averages from each kids sheet and creat a graph on a seperate sheet just showing the overall averages?
If so, will the graph automatically update as I update my numbers or will it have to be created again each time?
Thanks for all the help.

1) Welcome
2) Empty cells return 0 (zero)
3) anything divided by zero is infinite (and not legal, mathematically speaking)
so you should wrap your formula in an iferror() function to screen errors out. For the "Percentage" column you should do something like:
E2=iferror(B2/D2, "")
As long as B2/D2 is a valid result the iferror() passes the answer. If, however, D2 = 0, then iferror() will "catch" the error and return "" this is an empty string.
Charts do automatically update in Numbers. I don't actuall have Numbers for an iOS device (you posted to the forum dedicated to Numbers on Mac OS X).
The iWork for iOS forum is located here:
https://discussions.apple.com/community/app_store/iwork_for_ios

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Joe

Phil,
Thank you for looking at this.
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Can I make this station join my exisitng network?
As my lap top is wireless will I be able to surf through it upstairs?
Thanks
JohnO

1. You need to open the Express's configuration in Airport Admin Utility and change the Wireless Security settings to WEP or, preferably, WPA or WPA2. When you attempt to connect to the network from your computers, you will be prompted for the password.
2. The easiest thing to do is to hard reset the second Express and then use the Airport Setup Assistant to configure the second Express to join and extend the first Express's network. To do a hard reset, hold down the reset button until the LED starts flashing rapidly.
BTW, I know it can work because I have the exact same setup (D-Link DI-604 and two Expresses in an extended wireless network).

Help with running multiple threads

I'm new to programming with threads. I want to know how to run
multiple threads at the same time. Particularly for making games
in Java which I'm also begining to learn. For running multiple
threads at the same time, do you have to put two run() methods
in the source? If not then how do you make two threads or more
run at the same time?
Thanks for helping.

For running multiple
threads at the same time, do you have to put two run()
methods
in the source? Hi there,
Each thread is presumably performing a task. You may be performing the same task multiple times or be performing different tasks at once. Either way, each task would typically be contained within the run() method of a class. This class would either be a subclass of java.lang.Thread (extends Thread) or would be an implementation of java.lang.Runnable (implements Runnable). In either case, you would define a method with signature (public void run()...). The difference comes into play when you wish to actually perform one of these tasks. With a subclass of Thread, you would simply perform:
new MyTask().start();
With an implementation of Runnable, you would do this:
new Thread(new MyTask()).start();
This assumes you don't need to monitor the threads, won't be sending any messages to your tasks or any such thing. If that were the case, you would need to tuck away those returns to new MyTask() for later access.
In order to launch two threads simultaneously, you would have something along the lines of:
new MyTask().start();
new MyOtherTask().start();
Now it is perfectly possible that MyTask() would complete before MyOtherTask() managed to start in which case it wouldn't appear as if you had actually had multiple threads running, but for non-trivial tasks, the two will likely overlap. And of course, in a game, these tasks would likely be launched in response to user input, which means that you wouldn't have any control over when or in what order they executed.
Anyhow, it's as simple as that. You should also consider following the Java Threading trail which shows a simple example of using multiple threads. You can find it at:
http://java.sun.com/docs/books/tutorial/essential/threads/index.html
Regards,
Lynn

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