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2019-11-20 15:05 |
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签到天数: 2 天 [LV.1]初来乍到
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MIT6_094IAP10_lec02
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• How long did it take to do required problems?, X9 H/ E4 I& i
• Did anyone do optional problems?" ^ p% r) r) q
• Was level of guidance appropriate?
E$ G) ^& S8 J1 T* D- c# Y• Unanswered Questions?
0 t% S: u3 G0 r0 o• Some things that came up:8 d( T9 @1 ^- ~
• Use of semicolon – never required if one command per line. 5 @# [, q7 v# ~4 A- d" L2 i9 m
You can also put multiple commands on one line; in this case a semicolon is necessary to separate commands:, v, }" _" s" Q; K$ a
» x=1:10; y=(x-5).^2; plot(x,y);# V6 o# o: r$ S' U+ Y
• Assignment using indices – remember that you can index into matrices to either look up values or to assign value:
& `% ?7 X' ~) V# p, b» x=rand(50,1); inds=find(x<0.1); y=x(inds); U$ z0 K+ S: Y7 {, z' ^3 }. v7 `) F
x(inds)=-x(inds); x(inds)=3;0 U0 y: G; w' l
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发表于 2020-6-16 10:32
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