Editing Results (section)

==Trials After Macro==

After creating a Root macro that can easily extract and graph data from 4 trials of 5 different cable lengths, more trials were ran with varying interval times. Based on the previous graphs of length versus time, it was thought that the 0.0001 interval time was too fast to produce accurate results. With that interval time, the next ping signal is sent before the previous can even finish being processed by the computer, and this creates significant systematic error in the data. To avoid this issue, data was collected in the same manner as before, but using a 0.001 interval time. The macro was plotted histograms for each trial per cable length and created a graph relating the cable length and round-trip time.

[[File:Screenshot-1.png|center|frame| Fitted histograms of 4 trials for 5 cable lengths]]



[[File:Screenshot.png|center|frame| Graph of average round-trip time versus cable length with a 0.001 interval time]]



The experiment with the 0.001 interval time was repeated with similar results; the average round-trip time gradually increases as cable length increases in a linear manner. To reduce more systematic error, the order in which the cable lengths were used to collect data was randomized. When this data was plotted, the error greatly decreased and the graph was more consistent and fitted linearly.

[[File:001_exp2.png|center|frame| Graph of average round-trip time versus cable length with a 0.001 interval time and randomized order of cable lengths]]