Analysis_Software

More documents

Recommendations

Info

46 9.2 KaleidaGraph KaleidaGraph is one of many similar graphics and calculation programs available for the Macintosh. With it you can plot two-dimensional data in various formats, producing publication-quality results. It also has many built-in functions for performing simple calculations with your data. Since the full KaleidaGraph manual is available, we cover only the basics here: importing data and making simple plots. 9.2.1 Getting Data into KaleidaGraph Start KaleidaGraph from the Apple menu or by double-clicking on the KaleidaGraph program or one of its files. For small data sets you can simply type the numbers into the blank file that opens by default when you start KaleidaGraph, i.e. position the cursor in a cell and start typing. You can use the mouse or the arrow keys to move between cells. The TAB key moves right one cell and selects its contents - a handy way to overwrite the data in that cell. The program is column-oriented, and you should type data in columnar form. To give each data column a name, double-click on the top cell of the column to open the menu showing properties of that column. In this menu you can change the title of the column, the data format, and the column width. The title of the column is used as the axis label when you plot that column. Set up the columns as you wish and then type in the data. When finished you are ready to plot, using the Gallery menu, as described below. Figure 1 shows a sample data window from KaleidaGraph. Figure 1. KaleidaGraph Data Window When you produce data with another program (e.g. with FORTRAN), the output file is usually too large to conveniently type in by hand. In this case, you can import the data directly into KaleidaGraph containing columns of numbers. Here is the procedure: 1. Create the data file as a text (ASCII) file with columns of data, separated by at least one space. For example, in FORTRAN you might use the following commands: WRITE(10,’(F6.3,3x,F7.2)’) POSITION,TIME 2. If the file is not already on the Macintosh, transfer it using a program which can use ftp.
47 3. When you have the file on the MAC, start KaleidaGraph and choose “Open” from the File menu. A window will pop up asking you to tell KaleidaGraph more about the text file it is to open. You need to tell what delimiter you used, e.g. with the above FORTRAN statement, the data will delimited by 3 spaces, so choose “Space” and “≥3” from the menu. It also allows you to skip lines if there is data you don’t want in the KaleidaGraph file. When you click on “OK” the file should open as a KaleidaGraph data window. Data files might also be produced in lab experiments and stored on a DOS diskette. If this is the case, ask your Professor how to get the data onto the Macintosh. 9.2.2. Plotting Data With your data window open, simply choose the plot type from the Gallery menu; e.g. for the sample data above (Figure 1), choose “linear” and “scatter” to plot individual data points, unconnected. A window will pop up asking you what columns of data to use a x and y axes; choose time on the x-axis and position on the y-axis. The plot will look like something like this: Position 6 Sample KG Data 5 4 3 2 1 0 -0.2 0 0.2 0.4 0.6 0.8 1 1.2 Time You can delete an object by clicking once on it and pressing the delete key on the keyboard (or choosing “cut” from the edit menu). You can edit the plot by double-clicking on the object you want to change. For example: To change axis labels: To change axis ticks: To change the plot title: To change data point symbols: click on the axis label text; an edit window opens allowing you to make changes as needed. click on the axis itself; an edit window will open allowing you make changes in tick locations, tick mark numbers, grid, etc. click on the title and use the edit window. click on the symbol above the graph (in the legend). A window will open allowing several different symbols types and other format options.
Page 1 and 2: 43 9. ANALYSIS SOFTWARE Several com
Page 6 and 7: The graphical tools menu to the lef

Analysis_Software

Create successful ePaper yourself

Delete template?

Save as template?