20251117

lab2/dtor.m

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+% 度分秒转弧度
+function jrad=dtor(deg)
+degd=fix(deg);
+degf=(deg-degd)*100;
+degm=fix(degf);
+degs=(degf-degm)/36.0;
+jrad=(degd+degm*60.00+degs)*pi/180;

lab2/exercise2.m

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+% 练习2第1-4题
+% 1
+A=[6,9,3;2,7,5];
+B=[2,4,1;4,6,8];
+A+B
+A*B
+A*B'
+
+% 2
+clear
+A=[3,2,0,1,5];
+roots(A)
+
+% 3
+clear
+A = [4,9,2;7,6,4;3,5,7];
+B = [37;26;28];
+A\B
+
+% 4
+syms x
+f = 3*x^4-12*x^3-5*x+9;
+int (f,x)
+diff(f,x)
+int(f,x,0,2)