zxing create qr code c# Part 8: Creating Charts in Visual C#.NET

Drawer QR Code 2d barcode in Visual C#.NET Part 8: Creating Charts

Part 8: Creating Charts
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Microsoft Office Excel 2003 Inside Out If you intended to plot a larger or smaller range than you see in the sample window, you can set matters right on the Data Range line. If the program plotted columns as data series when you wanted rows instead, you can fix that with the Rows and Columns options. In Figure 24-2, for example, the program has given us two data series, each consisting of four points. If instead we wanted four data series, each consisting of two points, we would select the Rows option. Tip Plot multiple areas The data you plot does not have to lie in contiguous ranges. You could, for example, plot every other column in a data block. To select noncontiguous ranges, hold down Ctrl while you select each range. Then activate the Chart Wizard. Excel parses your data selection on the assumption that you want more points than series. For example, if you plot a selection that consists of three columns and 20 rows, the program will assume that the columns represent series and that the rows represent points. If the number of rows and columns in your selection is the same, Excel plots by row making each row a data series. The Series tab of the Step 2 dialog box allows you to make additional corrections. For example, suppose you ve given Excel a two-column range to plot, in which the first column consists of years. Excel has erroneously construed the years to be a data series. Figure 24-3 illustrates the problem.
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Figure 24-3. Excel has mistakenly plotted year labels as a data series. We can use the Series tab of the Step 2 dialog box to fix the problem.
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The Series list on the Series tab shows the name of each data series. The names here are the labels that will appear in your chart s legend if you decide to include a legend. When you select a name in the Series list, the Name field shows the worksheet cell from which Excel derived the name of the selected series, and the Values field shows the cells that contribute data to this series. The Category Axis Labels field, meanwhile, shows which cells Excel is using for the labels that appear along the category axis. In Figure 24-3, this field is blank; Excel will use default category-axis labels (1, 2, 3, and so on) instead of worksheet text. 612
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Part 8: Creating Charts
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Basic Charting Techniques To correct the problem shown in Figure 24-3, we need to select the Year series and click the Remove button. Then we need to select the Category (X) Axis Labels field and enter the range that contains our year labels.
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Inside Out
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Be careful plotting yearly data If you select a column of years and select one or more unlabeled columns of numbers, Excel will not recognize that you want the years to be category-axis labels. Instead it will treat the years as a data series. Amazingly enough, it will do this even if you have applied the Text format to your years. You could make Excel recognize your years as labels by prefixing each year with an apostrophe as you enter it on the worksheet. Alternatively, you can fix the problem in the Series tab of the Step 2 dialog box. (See Step 2: Specifying the Data to Plot. )
Step 3: Choosing Chart Options
The wizard s third page is where you make your first aesthetic decisions such as whether to include gridlines, a legend, or data labels. You can also add titles to your chart and its axes here. Each tab in the dialog box shows you the effect of your decisions immediately. Bear in mind as you work through this dialog box that you can always change your mind later.
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