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。

youdao

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。

youdao