1
Matlab , , , , ^ ( ), , , . . Enter. ans :
>> 1.5+2.9
ans =
.4000
, . ans . . :
, , ;
;
(!!!).
=, :
>> a=3.25*(0.7-3.3/5.1)+2.3^3
a =
12.3391
, . . e : 0.00125 1.25e-3 . i:
>>b=5*(2.2+3.9i)+0.8
b =
1.8000 +19.5000i
Matlab . . 1. . , help elfun. help . help, - , help .
1.
( ) | |
sin, cos, tan, cot | , , |
sec, csc | , |
( ) | |
asin, acos, atan, acot | , , |
asec, acsc | , |
sinh, cosh, tanh, coth | , , |
sech, csch | |
asinh, acosh, atanh, acoth | , , ; |
, , | |
Exp | |
Log, log2, log10 | , 2 10 |
sqrt | |
, | |
Abs, sign | |
conj, imag, real | -, |
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, , x = 0.2 y = -3.9:
, . Matlab , "Enter" Matlab :
>> x=0.2;
>> y=-3.9;
>> c=sqrt((sin(4/3*pi*x)+exp(0.1*y))/(cos(4/3*pi*x)+exp(0.1*y)))+...
((sin(4/3*pi*x)+exp(0.1*y))/(cos(4/3*pi*x)+exp(0.1*y)))^(1/3)
, :
>> x=0.2;
>> y=-3.9;
>> a=sin(4/3*pi*x)+exp(0.1*y);
>> b=cos(4/3*pi*x)+exp(0.1*y);
>> c=sqrt(a/b)+(a/b)^(1/3)
c =
2.0451
. , , . b, a. ↑. , , , sin cos, "Enter". "↑" "↓" , .. , "←","→", "Home", "End" - . ( , ) "PageUp", "PageDown" .
6.0 Matlab Command History . , "Enter", disp:
>> disp(c)
2.0451
. Matlab , . , , -1. , , Inf -Inf. NaN (Not a Number - ). Matlab .
whos. , a b :
>> a=-1.34;
>> b=2.98+3.86i;
whos,
>> whos a b
, . Class , Bytes - , , Size . .
Name Size Bytes Class
a 1x1 8 double array
b 1x1 16 double array (complex)
Grand total is 2 elements using 24 bytes
, Matlab . Matlab .
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, . . Preferences: File . Matlab 5.3 Numeric Format General , 6.x Text display Numeric Format Numeric display ( Command Window ). :
short (default) - ( );
long - ;
short e - ;
long e - ;
short g - short, short e ( long g);
hex - ;
+ - "+" "-", - ;
bank - ;
rat - .
, Matlab . , , short. 1/3333 short e, , .
format . ,
>> format short e
Preferences. , , short long . .
, whos.
- Matlab.
- , .
- .
- Matlab .
- ?
- , .
- , , .
- , , .
- .
- .
- , .
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- .
- "NaN" ?
- , .
- .
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- .
- .
- .
- .
- () .
- : "."( ),".."( ), "..."() ";".
- : ",", "%", "!", "=".
- : ans, computer, eps, i (j), inf, NaN.
- : nargin, nargout, pi, realmin, realmax.
- .
- .
- .
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- .
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