Why do we use the values 0 and 1 for indicator variables? Why do we need to find the pooled standard error? How to calculate the percent error when the expected value is zero? Why do residuals sum to zero? Define the central limit theorem and explain why it is important...
We will use several graphs in this format, so first, let’s explain the graph. This graph presents how much moisture enters a fabric and what happens to it afterward. During the test, water transfers from a sponge into the test fabric. We termed the amount of water transferred into the ...
Why do we use ray diagrams in optics? How does Earth science overlap with life science? Why do scientists need a standard system of measurement? Why is organization important to the study of ecology? Why is the Gaia hypothesis important to discuss in environmental science?
It’s very convenient to work with graphs when you’re querying and interacting with data, but when it comes to building relationships with existing data, foreign keys are your friends! Take a look at my January 2012 column, “Making Do with Absent Foreign Keys” (msdn.microsoft.com/...
Why Does Excel Do That, Anyway? If we use the same data to make a column chart (line and area chart, too), the labels go from left to right, as expected. Take another look at the column chart, and note where the origin of the axis system is located. I’ve indicated the origin ...
From our experience, it is common to initially share results with limited people (e.g., within a team) where we do not give much importance to details like aesthetics. However, at a later stage, researchers need the results to update the visualization to suit a wider audience, or use ...
What we use: MySQL + PHP + CodeIgniter + jQuery + Highcharts Highcharts I’ve found Highcharts to be really simple and configurable enough to do basically everything we want. You can create column, line, bar, pie charts within the comfort ofjQuery, pulling in data from wherever on your...
This is perfect if you only want to display the data within a UI. But if we need to ask more complex questions, for example, how many movies has Tom Lasseter directed? — things start to get complicated. Do we loop through every movie record and check thedirectorsarray for a name? Wha...
It’s very convenient to work with graphs when you’re querying and interacting with data, but when it comes to building relationships with existing data, foreign keys are your friends! Take a look at my January 2012 column, “Making Do with Absent Foreign Keys” (msdn.microsoft.com/...
Multiway graphs give a very global view of adaptive evolution. But in understanding the process of adaptive evolution, it’s also often useful to think somewhat more locally. We can imagine that all the possible rules are laid out in a certain space, and tha...