Website FAQ

How do I download the data used to generate the graph?

We have tried to make it as easy as possible for you to get your data in whatever form you need. The quickest way to export your data is to click on the "save" tab in any of the data graphs, and use the options there the select the format and other options. You can choose to download all the data available in the graph, or just the data selected in the range selector.

Transformations, such as moving averages, that you have selected to view in the graph, will not be reflected in the downloaded data.

How can I zoom in or out beyond what the range selectors allow?

For each graph there are two important date ranges. The loaded data range is the full range of data downloaded into the graph application. This is visible in the navigation graph. The displayed data range is a subset of the loaded data range. This is visible in the display graph. You can change the displayed data range by using the range slider in the navigation graph, but there are some limitations: you cannot zoom out further than 100% of the loaded data range, and you cannot zoom in further than 5% of the loaded data range.

To overcome these limits, you must change the loaded data range and download new data to the graph. You can do this by selecting new start and end dates for the graph in the "options" sidebar of the graph page.

How does the histogram work?

Every data graph can be set to show a histogram as well as a plot of the data. This histogram is calculated by determining the maximum and minimum values in the loaded data range, and dividing this range into 30 "buckets" or sub-ranges of equal length. Each point in the displayed data range is then categorized by the "bucket" into which it falls.

Because the ranges are set based on the entire loaded data range, but only populated with data from the displayed data range, the histogram can be used to see at a glance how the points in the section you are viewing relate to the rest of the data set.

To see the histogram for the entire loaded data range, use the range sliders to select the full range, or click on the "max" button at the upper left of the graph.

How do I use the graphs?

The data visualization engine has been designed to allow you easily to examine your data at multiple levels, from long term trends to individual sensor readings. The facilitate this, each data graph has been split into two windows: a navigation window that shows the full range of loaded data and allows you to select a section, and a display window which shows the selected data in more detail. You can change the size of the selection by dragging the handles at either side of the range selector, and you can pan the view by clicking and dragging anywhere in the display graph, or by moving the range selector.