如何返回文本框中符号表达式的内容？

浪尖

如题，不知道这样的说法对不对，或者说如何把输入文本框中的字符串转换成符号表达式？

[ 本帖最后由 eight 于 2007-1-30 21:03 编辑 ]

happy

sym(A)

[此贴子已经被作者于2006-3-31 20:17:47编辑过]

浪尖

好象不行啊，这样。

1. close all
   
2. figure('position',[100,100,800,500])
   
3. H1=uicontrol(gcf,'style','edit',...
   
4. 'unit','normalized','position',[0.03,0.03,0.45,0.8],...
   
5. 'BackgroundColor',[0.7 0.8 0.9],'ForegroundColor','b',...
   
6. 'string','show matrix','fontsize',14);
   
7. H2=uicontrol(gcf,'style','edit',...
   
8. 'unit','normalized','position',[0.53,0.03,0.45,0.8],...
   
9. 'BackgroundColor',[0.9 0.8 0.7],'ForegroundColor','b',...
   
10. 'string','input matrix','fontsize',12,'callback',...
    
11. ['aa=get(H2,''string'');','set(H1,''string'',aa);']);
    
12. set(H2,'Max',100)
    
13. H3=uicontrol(gcf,'style','push',...
    
14. 'unit','normalized','position',[0.53,0.85,0.12,0.08],...
    
15. 'BackgroundColor',[0.9 0.8 0.7],'ForegroundColor','b',...
    
16. 'string','求解','fontsize',12,'callback',...
    
17. ['bb=sym(''aa'');','cc=solve(''bb'');','set(H1,''string'',cc);']);

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这个我输入方程，得不出解

happy

1. close all
   
2. figure('position',[100,100,800,500])
   
3. cc='result of matrix +1';
   
4. H1=uicontrol(gcf,'style','text',...
   
5. 'unit','normalized','position',[0.03,0.03,0.45,0.8],...
   
6. 'BackgroundColor',[0.7 0.8 0.9],'ForegroundColor','b',...
   
7. 'string','show matrix','fontsize',14);
   
8. H2=uicontrol(gcf,'style','edit',...
   
9. 'unit','normalized','position',[0.53,0.03,0.45,0.8],...
   
10. 'BackgroundColor',[0.9 0.8 0.7],'ForegroundColor','b',...
    
11. 'string','input matrix','fontsize',12,'callback',...
    
12. ['aa=get(H2,''string'');','set(H1,''string'',aa);']);
    
13. set(H2,'Max',100)
    
14. H3=uicontrol(gcf,'style','push',...
    
15. 'unit','normalized','position',[0.53,0.85,0.12,0.08],...
    
16. 'BackgroundColor',[0.9 0.8 0.7],'ForegroundColor','b',...
    
17. 'string','matrix + 1','fontsize',12,'callback',...
    
18. ['bb=solve(sym(aa));','set(H1,''string'',{aa;cc;char(bb)});']);

复制代码

assist

我试了，可以用