1、绘制分段函数图像,需要知道分段函数的表达式。来绘制分段函数图像,该函数分为三段。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/fd039245d688d43fc533db5f731ed21b0ff43b80?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
2、x的取值范围选取0到3,y的表达式书写如下图所示,表示为每段的函数表达式乘以x区间的逻辑表达式,如果x的值在范围内,就乘以1,不在范围内,就乘以0。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/0b46f21fbe096b634fbd14fd02338744eaf8acf3?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3、点击回车键,运行程序,运行结果如下图所示,可以看到绘制的分段函数图像,一次性就绘制成功了。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/c995d143ad4bd113135cfd9f54afa40f4afb058d?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
4、分段函数为三段,每个x区间内有对应的y值表达式。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/908fa0ec08fa513d824d2673336d55fbb3fbd9bc?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
5、书写y的值如方框处所示,表达出了y的函数值。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/08f790529822720ebe2ea85775cb0a46f31fabbf?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
6、点击回车键,开始运行程序,运行结果如下图所示,分段函数绘制成功了。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/9358d109b3de9c82cbb6b3226281800a18d8434f?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)