(简单实用)MATLAB常用函数总结

MATLABMatlabpiexp(1)eijInfinfMatlabexp(x)elog(x)elog10(x)10log2(x)2xsqrt(x)xabs(x)sin(x)cos(x)tan(x)cot(x)sec(x)csc(x)asin(x)acos(x)atan(x)acot(x)asec(x)acsc(x)sinh(x)cosh(x)tanh(x)coth(x)sech(x)csch(x)asinh(x)acosh(x)atanh(x)acoth(x)asech(x)acsch(x)atan2(y,x)xxy]gcd(a,b)lcm(a,b)factorial(n)nreal(z)imag(z)abs(z)zangle(z)z]conj(z)zceil(x)xfloor(x)xround(x)xmax([abc])min([abc])sign(x)Matlaba+ba./ba-ba.\ba*ba^ba.*ba.^ba/b-aa\b'.'Matlab====~=matlabfactorialnnmatlab123symssimplify()matlaba+b*ia+b*ja+bia+bjrealzzimagzzabszzanglezzconjzzexpze^zMatlabmatlabsortvvsort(v,dim,’descendorascend’)dim=1descendorascenddim=2descendorascendMatlab1symsxlimit(f(x),x,a)f(x)xa2symsxlimit(f(x),x,a,’left’)f(x)xasymsxlimit(f(x),x,a,’right’)f(x)xaMatlabdiff('f(x)')diff('f(x)','x')f(x)xsymsxdiff(f(x))symsxdiff(f(x),x)MatlabMatlabdiff('f(x)'n)diff('f(x)','x'n)f(x)xnsymsxdiff(f(x)n)symsxdiff(f(x),xn)Matlabint('f(x)')int('f(x)','x')f(x)xsymsxint(f(x))symsxint(f(x),x)Matlabint('f(x)',a,b)int('f(x)','x',a,b)f(x)xabsymsxint(f(x),a,b)symsxint(f(x),x,a,b)Matlabsymsxtaylor(f(x),x,n,a)Matlabilaplace(F(s),s,t)ifourier(F(),,t)iztrans(F(z),z,n)ZMatlabdsolve('''')dsolve('''''')dsolve('D2x+2*x+x=sin(t)','x(0)=1','Dx(0)=1','t')matlablimit(limit(fxyxa)yb)maplemaplelimit(fxy{x=a,y=b})matlabMatlabdiffdiff(diff(f,x,m),y,n)diff(diff(f,y,n),x,m)maplemaplediff(fx1x2…,xn)matlabMatlabmaplemaplemtaylorf[x=x0y=y0]nx0y0fnmaplemtaylorf[xy]n00fnmatlabmatlabmaplestudentmaplewith(student)Maplemaplematlabgradient(f)fdivergence(x,y,z,u,v,w){u,v,w}curl(x,y,z,u,v,w){u,v,w}MatlabmaplemapleVectorCalculusmaple(‘withVectorCalculus’maple(‘maple’)Matlab1x=fminunc(‘f(x)’,x0,options)f(x)x0xx0options[x,fval]=fminunc(‘f(x)’,x0,options)xfvalMatlabf(x)-f(x)-f(x)f(x)fminunc(‘f(x)’,x0,options)1232x=fmincon(‘f(x)’,x0,A,b,Aeq,beq,lb,ub,nonlcon,options)f(x)x0xx0,optionsA,b,Aeq,beq,lb,ub,nonlcon[x,fval]=fmincon(‘f(x)’,x0,A,b,Aeq,beq,lb,ub,nonlcon,options)xfvalA,bAeq,beqlb,ubnonlconA*xbA=[],B=[]lbxub0000fmincon(‘f(x)’,x0,A,b,Aeq,beq,lb,ub,nonlcon,options)123matlab[a11a12a1na21a22a2nam1an2amn]aijmnaijijzerosmnmn0onesmnmn1eyennrandmnmnrandnmnmnmatlabdet(A)Asymsdet(A)matlabinvAAmatlabtransposeAAA.'AA'AmatlabrankAAMatlabtraceAAmatlabeigAA[VD]=eigAADAVAmatlablinsolveM,BMX=BXmatlab[a1a2an]a1a2anzeros1nn0zerosn1n0ones1nn1onesn1n1matlabA+BABA-BABk*AA*kkAmatlabdotababa'*bababmatlabcrossababmatlabMatlabmatlabmean(data)datadataharmmean(data)datadatageomean(data)datadatamatlabmedian(data)datadatamatlabvar(data)datadatavar(data1)datadatastd(data)datadatamatlabcov(data)datadatacov(data1,data2)data1data2data1data2corrcoef(data)datadatacorrcoef(data1,data2)data1data2matlabpolyfit(X,Y,n)XYnXYpolyval(P,X)XPPXRoundround(a),a(mean(cj,2)cj(mean(cj,1)cjsum((cj75),2)cj75sum((cj75),1)cj75