MIT6_094IAP10_lec02

Colbie

MIT6_094IAP10_lec02

• How long did it take to do required problems?
• Did anyone do optional problems?
* C  x+ }) [/ a. w• Was level of guidance appropriate?
• Unanswered Questions?
- N. z# j' G( s6 R2 D$ L/ v• Some things that came up:
• Use of semicolon – never required if one command per line.
You can also put multiple commands on one line; in this case a semicolon is necessary to separate commands:
» x=1:10; y=(x-5).^2; plot(x,y);
• Assignment using indices – remember that you can index into matrices to either look up values or to assign value:
» x=rand(50,1); inds=find(x<0.1); y=x(inds);
x(inds)=-x(inds); x(inds)=3;
" ^! j" j( B& F1 M% I
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busahuang

看看什么好东东。