方法统计2000 ~ 2005年的检测资料，绘制折线图直观显示各项目不合格构成比变化趋势。
Methods to perform the statistical analysis on the data of 2000 to 2005, and to draw the line graph to view the trend of unqualified constitute ratio.
这个例子演示了折线图、柱状图和饼状图的绘制方法。
This example demonstrated a line chart, histogram and pie mapping methods.
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