HP StreamSmart 400 StreamSmart 400 User Guide - Page 11

HP Mobile Calculating Laboratory The Statistics Aplet The StreamSmart Aplet works seamlessly with the Statistics Aplet to provide you all the tools you need to collect and analyze data. StreamSmart does the collection of the data and selection of a final data set for analysis, then exports the data directly to the Statistics Aplet, where additional graphing and analysis occurs. As stated previously, the HP MCL can collect data from up to four sensors simultaneously. In addition, each sample comes with a timestamp. The HP MCL combines these readings into an ordered data-tuple: (timestamp, channel 1 sensor, channel 2 sensor, channel 3 sensor, channel 4 sensor) Of course, one or more of the four channels may not have a sensor attached. In that case, the ordered data-tuple is shortened appropriately. Once you select the data you want to analyze, the data is sent to columns in the Statistics Aplet. The Statistics Aplet has ten columns available for data, C1 through C9, and C0. You may choose a destination column for each value in the ordered data-tuple of your experimental data, or use the default values provided. The result is that each datatuple becomes a row in a set of columns in the Statistics Aplet. When you export data to the Statistics Aplet, you can choose to follow your data into the Statistics Aplet for analysis or stay in the StreamSmart Aplet to continue experimentation. In-depth analysis of the data, including the calculation of summary statistics (for 1 or 2 variables) and modeling bi-variate data with various fits, is performed in the Statistics Aplet. This manual contains a brief introduction to the Statistics Aplet, but for more information about the Statistics Aplet, refer to the HP 39/40gs User's Guide. Manual conventions Throughout this manual, a few conventions have been employed to help you find the functions under discussion. There are four notational conventions, corresponding to primary key functions, shifted key functions, and functions in menus: 1. Functions on the keyboard appear in their own special font. For example, the ENTER key appears as `. Shifted functions will be noted as such and referenced both by the function name and the key combination required, as in the function, @ R (Plot Setup). 2. The HP 39/40gs calculators employ context-sensitive menus that appear along the bottom of the display. The functions in these menus are accessed via the top row of keys on the keyboard directly below the screen display. There are six of these menu keys in all. For example, in the Plot screen capture in Table 1-2, the four items shown in the menu are: CHAN, PAN, SCOPE, and STOP. Throughout this guide, these keys appear in a special font when they represent a key press. For example, when the ZOOM function appears in a step as a key press, it is represented by @ZOOM. 7