MATLAB使用中的问题

偶是小白

我是初学者，学的是MATLAB7.0，在使用过程中command windows中时不时会重复出现这种东西：


java.lang.IllegalArgumentException: Invalid substring range
at java.text.AttributedString$AttributedStringIterator.<init>(Unknown Source)
at java.text.AttributedString.getIterator(Unknown Source)
at javax.swing.text.Utilities.drawComposedText(Unknown Source)
at javax.swing.text.PlainView.drawElement(Unknown Source)
at javax.swing.text.PlainView.drawLine(Unknown Source)
at com.mathworks.mde.cmdwin.CmdWinSyntaxUI$SyntaxPlainView.drawLine(CmdWinSyntaxUI.java:509)
at javax.swing.text.PlainView.paint(Unknown Source)
at javax.swing.plaf.basic.BasicTextUI$RootView.paint(Unknown Source)
at javax.swing.plaf.basic.BasicTextUI.paintSafely(Unknown Source)
at javax.swing.plaf.basic.BasicTextUI.paint(Unknown Source)
at javax.swing.plaf.basic.BasicTextUI.update(Unknown Source)
at javax.swing.JComponent.paintComponent(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JViewport.blitDoubleBuffered(Unknown Source)
at javax.swing.JViewport.windowBlitPaint(Unknown Source)
at javax.swing.JViewport.setViewPosition(Unknown Source)
at javax.swing.JViewport.scrollRectToVisible(Unknown Source)
at javax.swing.JComponent.scrollRectToVisible(Unknown Source)
at javax.swing.text.DefaultCaret.adjustVisibility(Unknown Source)
at javax.swing.text.DefaultCaret.repaintNewCaret(Unknown Source)
at javax.swing.text.DefaultCaret$1.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

重复出现，不断刷频，都郁闷死了，不知道这是什么原因造成的，求高手指点~~~~~~~~


此外，本人还有两个小问题想问下：
1. 函数y=x.^2和y=^2有什么区别（注意前面的函数在x后面有个英文的句号）
2. 函数fplot 和 ezplot有什么区别

Backseat

我以前也遇到这种问题哦，后来重装几次就不会了，看看这个连接吧。可能有用。http://zhidao.baidu.com/question/121351529.html?si=2
那个不是句号，念作点吧。一个是矩阵对应位置相乘，后一个是矩阵相乘。
要是对图像要求不太高的话，区别应该不是很大吧。

偶是小白

回复 2# Backseat


    谢谢~~~

wz3118103

跟我一模一样的问题，但不知道咋办哪！