…If you think this task simply involves…calculating mean and median averages, think again.…Calculating the averages requires only a few lines of code and you're done.…Now this task goes much deeper.…Maybe not as deep as Lake Pend Oreille, but deep enough.…Let's take a look at the way the Pend…Oreille raw data is organized by going to the website.…Then clicking the raw data link on the main…page and it's deep more weather data that we want.…And the environmental data for 2001 through to…2010 is stored in these large text files.…
They range in size from about one and half megabytes.…To this one for 2008, which is nearly seven megabytes.…But if we look at the date for 2010, we…can see that it comes to an end in late May.…Thereafter, each measurement is in a separate…file that contains just one day's data.…So if we open this 2014 folder, we can see…inside the series of other folders one for each day.…And if we just open one at random we can see there…are 11 files in there one for each different type of measurement.…
David introduces challenges and provides an overview of his solutions in PHP. Challenges include topics such as statistical analysis, searching directories for images, and accessing peripheral devices.
Visit other courses in the series to see how to solve the exact same challenges in languages like C#, C++, Java, Python, and Ruby.
Skill Level Intermediate
Q: I'm encountering script errors message with the prime_dates.php file used in the "Priming the date_record column" movie in this course. How can I resolve these errors?
A: To avoid script errors, use bindValue() instead of bindParam() in
Line 9 of the prime_dates.php file. You can also download the latest
copy of the exercise files, which corrects this issue for you. For a
more in-depth explanation of the difference between bindValue() and
bindParam(), check out the "Binding input and output values" video (http://www.lynda.com/PHP-
Q: Why can't I access the Lake Pend Orielle site (http://lpo.dt.navy.mil)?
A: The Lake Pend Orielle site is not accessible in some geographical areas. We have contacted the owner of the server to try to resolve this issue.
Q: I am unable to access the Lake Pend Oreille data from outside the U.S.
A: A static copy of this data is provided here for lynda.com members outside of the U.S
Problem One: Statistical Analysis
Problem Two: Image Analysis
Problem Three: Eight Queens
Problem Four: Accessing Peripherals
Problem Five: Recursion and Directories
Problem Six: Building the Web
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