gtext函数用于利用鼠标将文本添加到图窗,下面利用实例讲解函数用法。
1、在MATLAB中画一个正弦曲线图,在命令窗口输入:x=1:0.01:10;y=sin(x);plot(x,y);
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/962bd40735fae6cd8f297e1700b30f2442a70f23?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
2、这时我们得到正弦图像:
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/d62a6059252dd42a4a60d5dd0c3b5bb5c9eab85f?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3、利用gtext函数,在图像中标注“y=sin x”;在命令行输入语句gtext('y=sin x');
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/fc1f4134970a304ee01f778cdec8a786c9175c83?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
4、这个时候在图像窗口会出现一个十字准线,在你需要标注的地方点击鼠标,就可以把你要标注的内容标在图上;
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/4bed2e738bd4b31ca65943cd88d6277f9e2ff85b?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
5、还可以利用命令gtext(‘y=sin x’,'FontSize',14)改变字体大小,其中14是指设置字体为14磅。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/91ef76c6a7efce1b06331ebca051f3deb48f65a8?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)