For instance, if you have a string in the first column that you need to ignore, plot using 2:3 instead.
例如，如果需要忽略第一列中的字符串，则使用2：3进行绘图。
2
At times, a real-life data set may not have all the points — there may be an x-value but the corresponding y-value may be missing for the column you are trying to plot.
有时，真实的数据可能没有包含所有的点——对于要绘图的列，可能有x值，但缺少相应的y值。
3
If you missed the previous columns, here is the plot so far: XM is a simple content management solution originally developed for the Working XML column.