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>> diary cw2.txt
>> A=[123;456;780]
A =
123
456
780
>> det(A)=
??? det(A)=
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Error: Expected a variable, function, or constant, found "end of line".
>> det(A)
??? Error using ==> det
Matrix must be square.
>> A=[1,2,3;4,5,6;7,8,0]
A =
1 2 3
4 5 6
7 8 0
>> det(A)
ans =
27
>> inv(A)=odwrotna_A
??? Undefined function or variable 'odwrotna_A'.
>> odwrotna_A=inv(A)
odwrotna_A =
-1.7778 0.8889 -0.1111
1.5556 -0.7778 0.2222
-0.1111 0.2222 -0.1111
>> l=A*odwrotna_A
l =
1.0000 0 -0.0000
-0.0000 1.0000 0
0.0000 -0.0000 1.0000
>> x=fzero('sin(2*x+1)*cos(x+3)^2',0)
x =
-0.5000
>> w=poly(v)
??? Undefined function or variable 'v'.
>> v=[1,2,3,4]
v =
1 2 3 4
>> w=poly(v)
w =
1 -10 35 -50 24
>> v=roots(w)
v =
4.0000
3.0000
2.0000
1.0000
>> f=sin(3*x+2)*cos(a+3*pi)^c
??? Undefined function or variable 'a'.
>> f='sin(3*x+2)*cos(a+3*pi)^c'
f =
sin(3*x+2)*cos(a+3*pi)^c
>> val=subs(f,{'x','a','c'},{2.1,2.25,1.25})
val =
0.5045
>> f='sin(x)*cos(2*x^2+x-2)'
f =
sin(x)*cos(2*x^2+x-2)
>> poch=diff(f)
poch =
cos(x)*cos(2*x^2+x-2)-sin(x)*sin(2*x^2+x-2)*(4*x+1)
>> f='sin(x+2*y)*cos(x*y)'
f =
sin(x+2*y)*cos(x*y)
>> poch_y=diff(f,'y',2)
poch_y =
-4*sin(x+2*y)*cos(x*y)-4*cos(x+2*y)*sin(x*y)*x-sin(x+2*y)*cos(x*y)*x^2
>> poch_x=diff(f,'x',2)
poch_x =
-sin(x+2*y)*cos(x*y)-2*cos(x+2*y)*sin(x*y)*y-sin(x+2*y)*cos(x*y)*y^2
>> f='(x+sin(x))/(1-cos(x))
??? f='(x+sin(x))/(1-cos(x))
|
Error: Expected a variable, function, or constant, found "incomplete string".
>> f='(x+sin(x))/(1-cos(x))'
f =
(x+sin(x))/(1-cos(x))
>> calka=int(f)
calka =
(-x*tan(1/2*x)^2-x)/(1+tan(1/2*x)^2)/tan(1/2*x)+4*log(tan(1/2*x))-2*log(1+tan(1/2*x)^2)
>> simple(calka)
simplify:
-(x-4*log(tan(1/2*x))*tan(1/2*x)+2*log(1+tan(1/2*x)^2)*tan(1/2*x))/tan(1/2*x)
radsimp:
-(x-4*log(tan(1/2*x))*tan(1/2*x)+2*log(1+tan(1/2*x)^2)*tan(1/2*x))/tan(1/2*x)
combine(trig):
(-x+4*log(tan(1/2*x))*tan(1/2*x)-2*log(1+tan(1/2*x)^2)*tan(1/2*x))/tan(1/2*x)
factor:
-(x-4*log(tan(1/2*x))*tan(1/2*x)+2*log(1+tan(1/2*x)^2)*tan(1/2*x))/tan(1/2*x)
expand:
-1/(1+tan(1/2*x)^2)*tan(1/2*x)*x-1/(1+tan(1/2*x)^2)/tan(1/2*x)*x+4*log(tan(1/2*x))-2*log(1+tan(1/2*x)^2)
combine:
(-x+4*log(tan(1/2*x))*tan(1/2*x)-2*log(1+tan(1/2*x)^2)*tan(1/2*x))/tan(1/2*x)
convert(exp):
i*(x*(exp(1/2*i*x)^2-1)^2/(exp(1/2*i*x)^2+1)^2-x)/(1-(exp(1/2*i*x)^2-1)^2/(exp(1/2*i*x)^2+1)^2)/(exp(1/2*i*x)^2-1)*(exp(1/2*i*x)^2+1)+4*log(-i*(exp(1/2*i*x)^2-1)/(exp(1/2*i*x)^2+1))-2*log(1-(exp(1/2*i*x)^2-1)^2/(exp(1/2*i*x)^2+1)^2)
convert(sincos):
(-x*(1-cos(x))^2/sin(x)^2-x)/(1+(1-cos(x))^2/sin(x)^2)/(1-cos(x))*sin(x)+4*log((1-cos(x))/sin(x))-2*log(1+(1-cos(x))^2/sin(x)^2)
convert(tan):
(-x*tan(1/2*x)^2-x)/(1+tan(1/2*x)^2)/tan(1/2*x)+4*log(tan(1/2*x))-2*log(1+tan(1/2*x)^2)
collect(x):
(-tan(1/2*x)^2-1)/(1+tan(1/2*x)^2)/tan(1/2*x)*x+4*log(tan(1/2*x))-2*log(1+tan(1/2*x)^2)
ans =
(-x+4*log(tan(1/2*x))*tan(1/2*x)-2*log(1+tan(1/2*x)^2)*tan(1/2*x))/tan(1/2*x)
>> f='(x^3-2*x+3)/(x^2-1)'
f =
(x^3-2*x+3)/(x^2-1)
>> v=int(f,'a',2)
v =
2-2*log(3)-1/2*a^2-log(a-1)+2*log(a+1)
>> subs(v,'a',1,5)
Warning: Log of zero.
> In E:\matlabR12\toolbox\symbolic\@sym\subs.m at line 118
ans =
Inf
>> subs(v,'a',1,5)
Warning: Log of zero.
> In E:\matlabR12\toolbox\symbolic\@sym\subs.m at line 118
ans =
Inf
>> subs(v,'a',1.5)
ans =
1.2035
>> v=quadl('exp(-x.^2)./(x.^+1)',-pi/2,4)
Warning: Minimum step size reached; singularity possible.
> In E:\matlabR12\toolbox\matlab\funfun\quadl.m at line 94
v =
-0.0271
>> v=quadl('exp(-x.^2)./(x.^2+1)',-pi/2,4)
v =
1.3378
>> wekt=linspace(3,7,9)
wekt =
Columns 1 through 5
3.0000 3.5000 4.0000 4.5000 5.0000
Columns 6 through 9
5.5000 6.0000 6.5000 7.0000
>> w=solve('a*x^2-3*x+b','x')
w =
[ 1/2/a*(3+(9-4*a*b)^(1/2))]
[ 1/2/a*(3-(9-4*a*b)^(1/2))]
>> wynik=subs(w,{'a','b'},{1,2})
wynik =
2
1
>> [x y]=solve('(x-3.1^2+(y-1.2)^2=2.56^2','(x-5.4)^2+(y-2.3)^2=1.21^2','x','y')
??? Error using ==> solve
'(x-3.1^2+(y-1.2)^2=2.56^2' is not a valid expression or equation.
>> [x,y]=solve('(x-3.1^2+(y-1.2)^2=2.56^2','(x-5.4)^2+(y-2.3)^2=1.21^2','x','y')
??? Error using ==> solve
'(x-3.1^2+(y-1.2)^2=2.56^2' is not a valid expression or equation.
>> [x y]=solve('(x-3.1^2+(y-1.2)^2=2.56^2','(x-5.4)^2+(y-2.3)^2=1.21^2','x','y')
??? Error using ==> solve
'(x-3.1^2+(y-1.2)^2=2.56^2' is not a valid expression or equation.
>> x=liinspace(0,pi,100);
??? Undefined function or variable 'liinspace'.
>> x=linspace(0,pi,100);
>> y1=sin(x.^2+1);
>> y2=sin(x).*cos(x);
>> plot(x,y1,y2)
??? Error using ==> plot
Not enough input arguments.
>> x=linspace(0,pi,100);y1=sin(x.^2+1);y2=sin(x).*cos(x);
>>
>> x=linspace(0,pi,100);y1=sin(x.^2+1);y2=sin(x).*cos(x);
>> x=linspace(0,pi,100);y1=sin(x.^2+1);y2=sin(x).*cos(x)
y2 =
Columns 1 through 5
0 0.0317 0.0633 0.0946 0.1256
Columns 6 through 10
0.1560 0.1858 0.2149 0.2431 0.2703
Columns 11 through 15
0.2965 0.3214 0.3450 0.3673 0.3881
Columns 16 through 20
0.4073 0.4249 0.4407 0.4548 0.4671
Columns 21 through 25
0.4775 0.4859 0.4924 0.4969 0.4994
Columns 26 through 30
0.4999 0.4984 0.4949 0.4894 0.4819
Columns 31 through 35
0.4725 0.4612 0.4480 0.4330 0.4163
Columns 36 through 40
0.3979 0.3779 0.3563 0.3334 0.3091
Columns 41 through 45
0.2835 0.2568 0.2291 0.2005 0.1710
Columns 46 through 50
0.1409 0.1102 0.0790 0.0475 0.0159
Columns 51 through 55
-0.0159 -0.0475 -0.0790 -0.1102 -0.1409
Columns 56 through 60
-0.1710 -0.2005 -0.2291 -0.2568 -0.2835
Columns 61 through 65
-0.3091 -0.3334 -0.3563 -0.3779 -0.3979
Columns 66 through 70
-0.4163 -0.4330 -0.4480 -0.4612 -0.4725
Columns 71 through 75
-0.4819 -0.4894 -0.4949 -0.4984 -0.4999
Columns 76 through 80
-0.4994 -0.4969 -0.4924 -0.4859 -0.4775
Columns 81 through 85
-0.4671 -0.4548 -0.4407 -0.4249 -0.4073
Columns 86 through 90
-0.3881 -0.3673 -0.3450 -0.3214 -0.2965
Columns 91 through 95
-0.2703 -0.2431 -0.2149 -0.1858 -0.1560
Columns 96 through 100
-0.1256 -0.0946 -0.0633 -0.0317 -0.0000
>> x=linspace(0,pi,100);y1=sin(x.^2+1);y2=sin(x).*cos(x))
??? x=linspace(0,pi,100);y1=sin(x.^2+1);y2=sin(x).*cos(x))
|
Error: Missing operator, comma, or semicolon.
>> x=linspace(0,pi,100);y1=sin(x.^2+1);y2=sin(x).*cos(x);)
??? x=linspace(0,pi,100);y1=sin(x.^2+1);y2=sin(x).*cos(x);)
|
Error: "End of Input" expected, ")" found.
>> ezplot('x^2-y^4',[-4 4])
>> ezplot('(t^2-2)*sin(t)+2*t*cos(t)','(2-t^2)*cos(t)+2*t*sin(t)',[0 pi])
>> rpzw=dsolve('D2y+y=exp(a*t)')
rpzw =
(1/(a^2+1)*exp(a*t)*cos(t)-a/(a^2+1)*exp(a*t)*sin(t))*cos(t)+(a/(a^2+1)*exp(a*t)*cos(t)+1/(a^2+1)*exp(a*t)*sin(t))*sin(t)+C1*cos(t)+C2*sin(t)
>> rozw=dsolve('D2y+y=exp(a*t)')
rozw =
(1/(a^2+1)*exp(a*t)*cos(t)-a/(a^2+1)*exp(a*t)*sin(t))*cos(t)+(a/(a^2+1)*exp(a*t)*cos(t)+1/(a^2+1)*exp(a*t)*sin(t))*sin(t)+C1*cos(t)+C2*sin(t)
>> rozw=simple(rozw)
rozw =
(exp(a*t)+C1*cos(t)*a^2+C1*cos(t)+C2*sin(t)*a^2+C2*sin(t))/(a^2+1)
>> dsolve(D2y=2*Dy)
??? dsolve(D2y=2*Dy)
|
Error: MATLAB assignment cannot be nested.
>> dsolve('D2y=2*Dy')
ans =
C1+C2*exp(2*t)
>> y=dsolve('D2y=2*Dy')
y =
C1+C2*exp(2*t)
>> y=dsolve(D2y/y=-9)
??? y=dsolve(D2y/y=-9)
|
Error: MATLAB assignment cannot be nested.
>> y=dsolve('D2y/y=-9')
y =
C1*cos(3*t)+C2*sin(3*t)
>> y=dsolve(y=k^2*D2y*(-1))
??? y=dsolve(y=k^2*D2y*(-1))
|
Error: MATLAB assignment cannot be nested.
>> y=dsolve('y=k^2*D2y*(-1)')