2014-11-03号 MatLab初探0001
整数数据类型
>> a =16
a =
16
>> whos a
Name Size Bytes Class Attributes
a 1x1 8 double
>> a = int8(16)
a =
16
>> whos a
Name Size Bytes Class Attributes
a 1x1 1 int8
>> a = int16(12)
a =
12
>> whos a
Name Size Bytes Class Attributes
a 1x1 2 int16
>> a = int32(13)
a =
13
>> whos a
Name Size Bytes Class Attributes
a 1x1 4 int32
>> a = int64(3232)
a =
3232
>> whos a
Name Size Bytes Class Attributes
a 1x1 8 int64
>> a = double(23)
a =
23
>> whos a
Name Size Bytes Class Attributes
a 1x1 8 double
>> a = single(3)
a =
3
>> whos a
Name Size Bytes Class Attributes
a 1x1 4 single
可以用如下赋值语句来产生复数：a=5+10i;
也可以用函数 complex 来产生复数，示例代码如下：
x=5;
y=10;
z=complex(x,y);
其中 x、y 为实数，得到的 z 是以 x 为实部，y 为虚部的复数。
也可以这样使用 complex 函数，具体代码如下：
x=5;
z=complex(x);
其中 x 为实数，得到的 z 是以 x 为实部，以 0 为虚部的复数。
>> a = 12 + 9i
a =
12.0000 + 9.0000i
>> whos a
Name Size Bytes Class Attributes
a 1x1 16 double complex
>> a = complex(12,4)
a =
12.0000 + 4.0000i
>> whos a
Name Size Bytes Class Attributes
a 1x1 16 double complex
>> a = 12+13j
a =
12.0000 +13.0000i
>> whos a
Name Size Bytes Class Attributes
a 1x1 16 double complex
inf与NaN
>> a = log(0)
a =
-Inf
>> whos a
Name Size Bytes Class Attributes
a 1x1 8 double
>> a = exp(1000)
a =
Inf
>> whos a
Name Size Bytes Class Attributes
a 1x1 8 double
>> a = 1/0
a =
Inf
>> a = 0/0
a =
NaN
>> whos a
Name Size Bytes Class Attributes
a 1x1 8 double
>> a = inf/inf
a =
NaN
>> a=-inf/inf
a =
NaN
>> a = logical(1)
a =
1
>> whos a
Name Size Bytes Class Attributes
a 1x1 1 logical
>> a = logical(0)
a =
0
>> whos a
Name Size Bytes Class Attributes
a 1x1 1 logical
>> a = logical(2121)
a =
1
>> whos a
Name Size Bytes Class Attributes
a 1x1 1 logical
>> a ='ewerwer'
a =
ewerwer
>> whos a
Name Size Bytes Class Attributes
a 1x7 14 char
>> a = char(34)
a =
"
>> whos a
Name Size Bytes Class Attributes
a 1x1 2 char
>> a = char([334,34,23,5,34])
a =
Ŏ""
>> whos a
Name Size Bytes Class Attributes
a 1x5 10 char 
>> a = @log
a =
@log
>> a(3)
ans =
1.0986
>> whos a
Name Size Bytes Class Attributes
a 1x1 32 function_handle
>>