Matlab/Octave Tutorial

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MATLAB 程式設計入門篇 : 初探 MATLAB矩陣的索引或下標74
MATLAB 程式設計入門篇 : 初探 MATLAB矩陣的索引或下標• 可以使用矩陣下標來進行矩陣的索引 (Indexing)• A(4:5,2:3) - 取出矩陣 A 的第四、五橫列與二、三直行所形成的部份矩陣• A([9 14; 10 15]) - 用一維下標的方式來達到同樣目的• 用冒號 (:), 取出一整列或一整行• A(:, 5) - 取出矩陣 A 的第五個直行• 用 end 這個保留字來代表某一維度的最大值• A(:, end) - 矩陣 A 的最後一個直行• 可以直接刪除矩陣的某一整個橫列或直行• A(2, :) = [] – 刪除 A 矩陣的第二列• A(:, [2 4 5]) = [] - 刪除 A 矩陣的第二、四、五直行75
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Outline• Basics of Matlab (slides
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MATLAB 程式設計入門篇
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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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•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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