This bypasses the false color screen, and imports a one-dimensional (x-y) data set, which is then plotted. This data set can then be analyzed via least-squares fits or powder indexing. The input file format is that created by the "Save Plot" command, so a common usage would be:
  • Open a 2D data file, and create an x-y plot as a 1D cut through the data
  • Save the data (Save Plot) in a text file
  • Open the text file with an external editor or spread sheet and modify it. For example, you might want to remove "bad points" or stitch together multiple plots from different angular ranges.
  • Import the modified file using Import 1D Data for further analysis in Datasqueeze.
Your data file should be in ascii format. Each line should minimally consist of an independent variable (e.g., Q) and the measured intensity, with an optional third column for uncertainty in the intensity, all separated by spaces, commas, or tabs. When the menu item is activated, you get a new window. Buttons in the top row select the column delimiters. The second row of buttons allows you to state whether there is a third column for uncertainties. The drop-down "Independent Variable" box allows you to choose the name of the independent variable. If you have some header information at the top of your file, select an appropriate number under "Lines to Skip" so that the first line read in is actual data. You can choose whether the X and Y axes should be plotted on linear or log scales. (The data in the file itself should always be on a linear, or absolute scale). Click on Browse to choose an input file. When this is done, you will either get an error message or the first few lines of the file in white box. After looking at the file, you may wish to adjust the Column Delimiter and other settings above. Then click on Read. If the file was correctly read in, you should be able to click on Apply, at which point your data will be plotted. Click on Done to close the window. The shortcut key is (ctrl)-Shift-I (or Apple-Shift-I on Macintosh). In Batch mode see the IMPORT1D option. Your data file should be in ascii format. Each line should minimally consist of an independent variable (e.g., Q) and the measured intensity, with an optional third column for uncertainty in the intensity, all separated by spaces, commas, or tabs. When the menu item is activated, you get a new window. Buttons in the top row select the column delimiters. The second row of buttons allows you to state whether there is a third column for uncertainties. The drop-down "Independent Variable" box allows you to choose the name of the independent variable. If you have some header information at the top of your file, select an appropriate number under "Lines to Skip" so that the first line read in is actual data. You can choose whether the X and Y axes should be plotted on linear or log scales. (The data in the file itself should always be on a linear, or absolute scale). You can also redefine the wavelength that was used for this data set. Start by clicking on Browse to choose an input file. When this is done, you will either get an error message or the first few lines of the file in white box. After looking at the file, you may wish to adjust the Column Delimiter and other settings above. You can also change the number of lines to read in (box next to Lines to Skip)—the default is the total number of lines in the file minus the number of lines to skip, but if desired you can read in a smaller number of lines. (The lines to read can only be changed after hitting the Browse button). Then click on Read. If the file was correctly read in, you should be able to click on Apply, at which point your data will be plotted. To change the details of the plot, click the Advanced Features button which brings up the same Advanced Plot Features window which is described in more detail in the Plot Panel section. Click on Cancel/.Done to close the window. The shortcut key is (ctrl)-Shift-I (or Apple-Shift-I on Macintosh). In Batch mode see the IMPORT1D option.