Matlab/Octave Tutorial

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MATLAB 程式設計入門篇 : 初探 MATLAB2-3 常用數學函數• MATLAB 是一個科學計算軟體 , 因此可以支援很多常用到的數學函數• >> y = abs(x) % 取 x 的絕對值• >> y = sin(x) % 取 x 的正弦值• >> y = exp(x) % 自然指數 exp(x)• >> y = log(x) % 自然對數 ln(x)• MATLAB 也支援複數運算 , 通常以 i 或 j 代表單位虛數14
MATLAB 程式設計入門篇 : 初探 MATLAB向量矩陣的運算• 有一些函數是特別針對向量而設計• >> y = min(x) % 向量 x 的極小值• >> y = max(x) % 向量 x 的極大值• >> y = mean(x) % 向量 x 的平均值• >> y = sum(x) % 向量 x 的總和• >> y = sort(x) % 向量 x 的排序15
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The following slides are fromProf.
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Some contents of MATLAB's symbolic
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DifferentiationSee >>help sym/diffd
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Multiple differentiationTo find dif
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133
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•If you want diff_f to retain its
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clear, syms a c x g A>> g = exp(-a*
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• >> subs(int_def_g,{a,c},{2,4})a
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642tan(x)0-2-4-6-6 -4 -2 0 2 4 6xWh
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Review Questions•What command do
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Matlab/Octave Tutorial

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