Open and plot files

This section describes how to open files and plot them

  • Step One

    As soon as you open AAnalyzer, a pop up window will appear. This window will allow you to continue working on an existing project, it will open files with a .fil extension.

  • Step two

    To start a new project, close the pop up window and choose the open button highlighted in the following image.

  • Step three

    Now that the file has been selected, you must specify the data within the file that will be considered. Under the file editor tab, choose the “see file” option, and select the file that contains the experimental data.

  • Next step

    This option will allow you to open any text file. AAnalyzer will recognize columns (or channels) in the text file if they are separated by a coma, semi colon, space, or tab, as shown in the following image. Each channel represents a potential “x” or “y” axis.

  • Next step

    If your text file contains headers such as this one (as shown in the last image), you should check the skip lines box and indicate the number of lines covered by your headers. You must also indicate whether the channel corresponding to the “x” axis is binding or kinetic energy.

  • Next step

    The “data” tab also allows the user to modify Shift, Offset, and Gain of the data. For more information about Shift, Offset, and Gain, please refer to the “Shift, Offset, and Gain options” instructional tab.

  • Next step

    Finally, under the “data and fits plot” tab, click “plot all” to view your data on the graph. AAnalyzer will automatically plot the x axis as kinetic energy using the photon energy of Al K? (1486.7). If you wish that your x axis be shown as binding energy, check the “use BE” box near the lower left corner. If you used a different photon energy, make sure to input the proper value in the “photon energy” box.

  • Next step

    Should you want to zoom in to a certain area of your peak, you can either use the “x-axis limits” group box or use the mouse option. The first allows the user to reduce the “x axis” window in order to focus on a specific set of peaks. Input new “x axis” values in the “x axis limits” group box located near the lower left corner of the “data and fits plot” tab. Check the “apply” box and plot again.

  • Next step

    If the “force” boxes are left unchecked, AAnalyzer will find “x axis” limits that better adjust to the peaks displayed for the given range. On the other hand, if the “force” boxes are checked, the “x axis” will be displayed with the exact limit values. Both options differ slightly. The “y axis” settings adjust automatically according to the data shown within the “x axis” limits.

  • Next step

    With the mouse option, you may simply press-and-hold the “control” key and click-and-drag the mouse from the x-coordinates you wish to zoom in to. With this option you don’t need to click the “Plot All” button after selecting where to zoom in to.

  • Next step

    To save your progress, click the “save” button in the upper right corner of the “data” tab. This will save all information inputted in the “data” tab, as well as parameter information in the “fitting parameters” tab, if you have any. When you reopen AAnalyzer, you will be able to access any project you worked on by selecting it in the pop up window mentioned at the beginning of this section. The last project you saved will be the default file in the open box.