“《超越学科的认知基础》2015张世超学习报告第六周”版本间的差异
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(→Mathematica 指令表) |
(→Mathematica 指令表) |
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第49行: | 第49行: | ||
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!cospan="8"|Function | !cospan="8"|Function | ||
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|Define a function;f[x_]:=cos[x]+sin[x];g[x_]:=cos[x]-2; | |Define a function;f[x_]:=cos[x]+sin[x];g[x_]:=cos[x]-2; |
2015年10月27日 (二) 04:30的版本
关键词
Mathematica[1]
学习报告
Mathematica 指令表
Mathematica 指令表 | |||||||
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操作 | 指令 | ||||||
enter i | type esc-ii-esc | ||||||
enter square root | control -2 | ||||||
enter "e" | esc-ee-esc | ||||||
Mutiply the matrix A by the Vector v. | A.v %//MatrixForm | ||||||
Determinant | Det[A] | ||||||
Inverse | Inverse[A]//MatrixForm | ||||||
MatrixPower | [A,2]//MatrixForm or A²//MatrixForm | ||||||
Transpose | Transpose[A]//MatrixForm | ||||||
Extract | A1//MatrixForm | ||||||
Make a 10×10 matrix and automatically populate if with a formula. | M=Table[i*j+sin[i+j},{i,1,10},{j,1,10}];M//MatrixForm | ||||||
data={1,2,3,4,5} | av2[v_]:=Total[v]/Length[v];av2[data] | ||||||
Function | |||||||
Define a function;f[x_]:=cos[x]+sin[x];g[x_]:=cos[x]-2; | Evaluate+for x =1;N[f[1],500] | ||||||
Average:Write a function av(v) | evaluate it for {1,2,3,4,5} | ||||||
Plotting | |||||||
Plot the function sin(x) in the range 0<x<5 | Plot [sin[x],{x,0,5}] | ||||||
Superimpose the plots of sin(x) and cos(x) | Plot[{sin[x],cos[x]},{x,0,10}] | ||||||
Make a 3D plot of sin(x)cosxy over the range 0<x<5,0<y<5 | Plot 3D[sin[x]Cos[y],{x,0,5},{y,0,5}] |